OVERVIEW OF RECENT GEOLOGIC FIELD INVESTIGATIONS,...

PIR 2008-1A 1

INTRODUCTIONIn recent years, the Alaska Department of Natural Resources (DNR) has pursued a leadership role in advanc-

ing the understanding of North Slope geology and petroleum systems, primarily through stratigraphic studies and geologic mapping in the foothills of the northern Brooks Range (fi g. 1). The North Slope Energy Program was developed in response to the need for high quality, publicly available geologic data to stimulate exploration for hydrocarbons in northern Alaska. Directed by the Division of Geological & Geophysical Surveys (DGGS), this program is a multi-agency collaboration with geologists and geophysicists from the Division of Oil & Gas (DOG), the United States Geological Survey (USGS), and the University of Alaska Fairbanks (UAF), among others.

In addition to original geological studies, we also led an annual two-day fi eld trip aimed at highlighting key exposures that provide insight into the geologic evolution of the North Slope petroleum system. In 2007, this tour took place on June 29 and 30 and was attended by 21 geologists from seven oil and gas companies, in addition to geologists and directors from DGGS, DOG, and USGS. The summary presentation provided to attendees is included here as Appendix A-1.

This volume of collected papers is intended to offer timely summaries of recent data and interpretations (fi g. 1 shows location of each study area). Some of the topics covered in papers in this volume include data acquired prior to the 2007 season. All of these reports are based in part on preliminary fi eld evidence; fi nal interpretations await additional analytical data, particularly biostratigraphic information.

PROJECT STAFFIn order to achieve our program objectives, we annually assemble a team with a cross-section of expertise suf-

fi cient to address topics relevant to understanding of the petroleum system in northern Alaska. During 2007, the following geologists participated in various aspects of fi eld and/or analytical work, some of which are presented in various papers included in this volume:

Marwan Wartes (DGGS)—Clastic sedimentology, basin analysis, and tectonicsPaul Decker (DOG)—Stratigraphy, structural geology, and petroleum geologyDavid LePain (DGGS)—Clastic sedimentology and sequence stratigraphyRobert Gillis (DGGS)—Structural geology and thermochronologyRocky Reifenstuhl (DGGS)—Reservoir quality and geologic mappingRobert Swenson (DGGS)—Structural geology and petroleum geologyWes Wallace (UAF)—Structural geology, tectonics, and geologic mappingC. Gil Mull (Consultant)—Regional geologyPaige (Peapples) Delaney (DGGS)—Structural geology and geologic mappingAndrea Loveland (DGGS)—Structural geology and geologic mappingKen Helmold (DOG)—Reservoir quality and basin modelingDiane Shellenbaum (DOG)—Seismic stratigraphy and data processingPeter Flaig (UAF, Ph.D student)—sedimentology and stratigraphyDolores van der Kolk (DGGS/UAF, MS student)—sedimentology and stratigraphyJacob Mongrain (DGGS/UAF, Ph.D student)—sedimentology and stratigraphy

In addition, we also benefi tted from informal collaboration with several USGS geologists engaged in petro-leum-related geological research in northern Alaska, including David Houseknecht, Tom Moore, Chris Schenk, and Chris Potter.

1Alaska Division of Geological & Geophysical Surveys, 3354 College Rd., Fairbanks, Alaska 99709-3707Email for Marwan A. Wartes: [email protected]

2Alaska Division of Oil & Gas, 550 W. 7th Ave., Suite 800, Anchorage, Alaska 99501-3560

OVERVIEW OF RECENT GEOLOGIC FIELD INVESTIGATIONS, NORTH SLOPE AND BROOKS RANGE FOOTHILLS, ALASKA

byMarwan A. Wartes1 and Paul L. Decker2

2 PIR 2008-1A Preliminary results, fi eld investigations, Brooks Range foothils & North Slope, Alaska

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Overview of recent geologic fi eld investigations, North Slope and Brooks Range foothills, Alaska 3

SUMMARY OF 2007 FIELD PROGRAMIn 2007, our team was based out of a temporary camp near Galbraith Lake from June 15 through July 10 (Sheet

A-1). The majority of our work was helicopter supported and ranged from daily fl ights to multi-day spike camps that were deployed to remote locations. Sheet A-1 illustrates the coverage of our ~700 different fi eld stations. In addition to sedimentologic and structural observations, an extensive selection of samples were collected, most of which require contracted analytical work. The results of these analyses were not yet available for inclusion in this volume, although subsequent publications will incorporate these data. Samples were collected for the following purposes:

• Lithology (representative) • Thin sections • Porosity and permeability • RockEval and total organic carbon • Vitrinite refl ectance • Hydrocarbon extract and biomarker typing • Megafossil paleontology • Microfossil paleontology (foraminifera and palynology) • Whole-rock geochemistry • Geochronology (tuff and bentonite) • Apatite fi ssion track thermochronology • Detrital zircon geochronology

The following summary of our 2007 fi eld work is intended to be a brief review; more detailed data and inter-pretations either appear within the papers in this volume, or will be expanded upon in future reports. The focus for our 2007 fi eld studies can be geographically subdivided into a northern and southern belt (Sheet A-1) and are discussed below accordingly.

Northern Belt (Cretaceous strata of the south-central Sagavanirktok Quadrangle)Previous reconnaissance work and stratigraphic studies by DGGS have documented a number of important

exposures of Cretaceous strata between the Toolik and Echooka rivers (Sheet A-1). These outcrops expose sev-eral Brookian depositional sequences in a compact area and provide valuable insight into the time-transgressive northeastward progradation of genetically related shelf, slope, and deepwater facies. Through increased col-laboration with DOG geologists, we have begun integrating detailed outcrop observations with available well and two-dimensional (2-D) seismic data, greatly increasing the robustness of our stratigraphic correlations and regional geologic models.

• Preliminary Sagavanirktok River Area Geologic Mapping—We have received state and federal funding to conduct a STATEMAP project in 2008 in the south-central Sagavanirktok Quadrangle (Sheet A-1). In preparation for this detailed (1:63,360-scale) mapping effort, we conducted reconnaissance work during the 2007 season. The area contains a number of large east–west-trending folds with uncertain gas prospectivity, but has never been mapped in detail (see Mull [1989] for 1:250,000-scale “strip maps” along the Dalton Highway). Our preliminary work helped identify geologically reasonable map borders and highlighted stratigraphic nomenclature issues. In particular, the stratigraphy of this map area is transitional between the Umiat area, where the formation designations largely focus on proximal units, and the Canning River area, which includes correlative distal units, but with differing stratigraphic nomenclature (Molenaar and others, 1986; Mull and others, 2003).

• Gilead sandstone (Torok Formation)—Tertiary uplift of the northeastern Brooks Range has locally exposed the lower parts of the Brookian Sequence along the Phillip Smith mountain front (Pessel and others, 1990). These rocks include the Albian–Cenomanian Gilead sandstone (informal name), which provides unique insight into the early evolution of the basin that is largely concealed in the subsurface to the west (Reifenstuhl, 1991). To improve our understanding of the stratigraphy and structure of this area, a number of traverses were conducted during the 2007 fi eld season along the Ivishak River, Gilead Creek, and across Gilead syncline (Sheet A-1). Our preliminary interpretations, summarized in Decker and others (2008), suggest that Albian to Turonian depositional environments near the southeastern


margin of the Colville foreland basin may have been signifi cantly different from the time-equivalent stratigraphic record farther west in the Umiat and Tarn/Meltwater areas.

• Terminal Nanushuk shelf edge—The terminal shelf edge of the easterly prograding Albian–Cenoma-nian Nanushuk–Torok depositional system is well defi ned by seismic and well log correlations in the area north of the Umiat baseline near the Itkillik River, some 80 km west of the Dalton Highway (for example, Houseknecht and Schenk, 2005). However, this depositional system also included a northerly prograding topset sequence derived from the Brooks Range that extended much farther east across the present-day foothills province (Molenaar, 1988; Huffman and others, 1988). The northern limit of the Nanushuk Formation within this transverse component of the system is very poorly known due to limited exposure, complex structure, and the lack of publicly available subsurface data. The Torok Formation is exposed along the Dalton Highway at a locality named “Ice Cut” (Mull, 1989; Sheet A-1). During the 2007 fi eld season, we visited an enigmatic exposure of loosely consolidated pebble conglomerate and sandstone exposed east–northeast of Ice Cut. This isolated outcrop includes locally channelized facies that are not typical of the deepwater Torok Formation in this area, most notably with respect to grain size. On the basis of reconnaissance mapping, we suspect these gravels lie in the footwall of a thrust fault and may represent a preserved remnant of the most northerly Nanushuk topset facies. Whether part of the Nanushuk, Torok, or conceivably the Tuluvak Formation, this exposure has signifi cant implications for paleogeographic, depositional environment, and thrust reconstructions, particularly with respect to the type and extent of prospective reservoirs in this area. More work is needed to evaluate multiple hypotheses that might explain this anomalous exposure.

• Seabee Formation—In outcrop, the Seabee Formation has been fairly well defi ned in the Umiat area (for example, Houseknecht and Schenk, 2005; Mull and others, 2004). However, despite signifi cant hydrocarbon discoveries in more distal facies, such as the informally named Bermuda interval (Alaska Oil and Gas Conservation Commission, 1998; 2001), limited work has been published correlating the unit basinward to the east (Decker, 2007). During 2001, 2002, and 2007, D. LePain and colleagues conducted detailed sedimentologic work on Turonian–Campanian strata discontinuously exposed along an unnamed tributary between the Sagavanirktok and Ivishak rivers. We informally refer to this drainage as “Sagashak Creek” (Sheet A-1). Despite signifi cant stretches of cover, we have been able to construct a composite stratigraphy along this traverse encompassing approximately 2,450 m of Upper Cretaceous section (LePain and others, 2008a). On the basis of biostratigraphic control, cor-relation with available subsurface data, and facies considerations, the lower portion of this section is designated as Seabee Formation and is interpreted as proximal basin-fl oor(?)–base-of-slope deposits (LePain and others, 2008a, this volume; 2008c).

We also revisited an exposure on the Sagavanirktok River, just downstream from the confl uence with the Lupine River (Sheet A-1; see also LePain and others, 2002). This sandstone and shale section was originally mapped as Nanushuk Formation by Mull (1989). However, recent revisions to Cretaceous stratigraphic nomenclature (Mull and others, 2003) restrict the Nanushuk Formation to seismic topset facies. Based on the sedimentary facies at this location, such as the prevalence of sediment gravity fl ows, we presently interpret the section as dominantly deepwater deposits, of either the Cenomanian upper Torok Formation or Turonian Seabee Formation, or perhaps spanning the contact between these two units. This interpretation is supported by the locally abundant bentonite, tuff, and appar-ent tuffaceous sandstone, all of which are characteristic of Upper Cretaceous units. We are awaiting biostratigraphic analyses to assist formation designation and more precise ties to the nearby Lupine well (Sheet A-1).

• Hue Shale—At the type locality along Hue Creek in ANWR, the Hue Shale includes condensed ba-sinal mudstone, bentonites, and tuff ranging from Aptian to Campanian in age (Molenaar and others, 1987). However, coeval Brookian strata in the central Sagavanirktok Quadrangle are much thicker and include more proximal slope facies of the Seabee and Canning Formations (fi g. 2; LePain and others, 2008a). The transitional nature of these facies relationships is well illustrated at one locality along Sagashak Creek (Sheet A-1), where a conspicuous section of organic-rich mudstone and tuffa-ceous strata are intercalated with more sandstone-rich slope and base-of-slope(?) facies (LePain and others, 2008a). We interpret this as a direct outcrop example of the commonly depicted intertonguing of more proximal units with the condensed Hue shale (fi g. 2). This interval was also noteworthy for


Figure 2. Chronostratigraph-ic column showing revised Cretaceous and Tertiary stratigraphic nomenclature of Mull and others (2003). cs* = cobblestone sandstone (informal unit) of Fortress Mountain Formation; ms** = manganiferous shale unit (informal).


its strong hydrocarbon odor within shales and subjacent tuffaceous sandstone beds. The presence of this condensed zone is a potentially useful sequence stratigraphic marker and likely refl ects sediment starvation, probably during transgressive and/or highstand conditions.

• Canning Formation—In outcrop, the term Canning Formation has historically been limited to the area east of about the Echooka River (Sheet A-1). Many Santonian–Campanian rocks in the central Sagavanirktok Quadrangle have been assigned instead to the Schrader Bluff Formation (Mull and others, 2003; C.G. Mull, unpublished mapping). However, recent well and seismic correlations indi-cate that shelfal strata of the lower and middle(?) Schrader Bluff Formation transition eastward into slope–clinoform deposits, and are thus more appropriately ascribed to the Canning Formation (for example, Houseknecht and Schenk, 2005; Decker, 2007). This is supported by biostratigraphic data and facies interpretations from Sagashak Creek area, where the Canning Formation is interpreted to overlie the Seabee Formation (LePain and others, 2008a, this volume; 2008c).

• Prince Creek and Schrader Bluff Formations—In 2007, we measured sections in the Schrader Bluff Formation at three localities. From west to east (proximal to distal) these sections were along the Toolik River, Sagashak Creek, and the Ivishak River (Sheet A-1). Detailed outcrop observations for the Sagashak section are reported in LePain and others (2008a), where the upward transition from upper slope Canning Formation into shelfal Schrader Bluff can be documented. An additional section measured along the Ivishak River expanded upon on earlier work by LePain in 1999, characterizing depositional environments ranging from distributary mouth bars and channels to stacked coarsen-ing- and thickening-upward delta lobes. UAF graduate students Peter Flaig and Dolores van der Kolk collected detailed sedimentologic and stratigraphic data along the Toolik River where they documented intercalations of nonmarine coal-bearing facies of the Prince Creek Formation with shallow marine rocks of the Schrader Bluff Formation. Similar intertonguing relationships are interpreted in the sub-surface (Decker, 2007). Subsequent work will seek to correlate these three exposures and consider their evolution in a sequence stratigraphic context.

Southern Belt (proximal synorogenic foreland basin facies)Lower Cretaceous rocks in the Brooks Range foothills possess signifi cant potential for large oil and gas

accumulations, particularly shallow marine and turbidite facies of the Nanushuk–Torok system (for example, Houseknecht, 2003). Recent leasing activity, the potential opening of additional acreage in southern NPRA, and the move toward commercialization of North Slope gas all underscore the signifi cance of this underexplored interval. During the 2007 fi eld season, we continued a number of ongoing stratigraphic studies of Lower Cretaceous rocks in the foothills. The complex structural evolution of the foothills results in an increased exploration risk associated with maturation, migration, and trap formation. Therefore, the program also continued to evaluate the structural geology of the inner Brooks Range foothills (south of the Tuktu escarpment shown on Sheet A-1), documenting the geometry and style of deformation.

• Geologic Mapping in the Proximal Foreland Basin—In recent years, DGGS has conducted detailed (1:63,360-scale) geologic mapping across the central Brooks Range foothills, just north of the moun-tain front (for example, Peapples and others, 2007; Harris and others, 2002). Due to the complexity of the geology in this area, there remain signifi cant unresolved questions that limit our ability arrive at a coherent structural/stratigraphic model for the evolution of the area. Our main focus in 2007 was along Peregrine Ridge, Section Creek, and Accomplishment Creek (Sheet A-1). This new detailed mapping data will be integrated with previous work to help develop a more regionally consistent framework.

• Burial History in the Proximal Foreland Basin—Recent geologic mapping, stratigraphic studies, thermal maturity data, and thermochronologic constraints have led us to conclude that a signifi cant portion of the proximal foreland basin was deposited on top of the orogenic wedge—including the entire belt marked by the Early Cretaceous Fortress Mountain Formation. This observation suggests that an extensive Early Cretaceous wedge-top depozone (in the sense of DeCelles and Giles, 1996) existed in the southern Colville foreland basin. Syndepositional deformation within this zone may have promoted persistent structural highs that limited accommodation and thus burial (Wartes and Swenson, 2005). This model of foreland basin development partly explains anomalously low thermal maturity values observed by other studies along the Brooks Range foothills (for example, Cole and


others, 1997; Mull and others, 2000). In order to test the wedge-top model, we collected a number of apatite fi ssion track samples in 2007 from the Cobblestone Creek area. This region was selected in light of prior data that indicated abrupt northward increase in mid to Late Cretaceous stratigraphic burial (Mull and others, in review). Ultimately, future oil and gas exploration in the foothills will benefi t from a basin model that can accurately predict burial history and maturation.

• Okpikruak Formation—Although the Berriasian–Valanginian Okpikruak Formation is unlikely to represent a viable reservoir interval, the unit does represent our only stratigraphic window into the early Neocomian record of foreland basin evolution. In 2007, we investigated several exposures in the Section Creek area (Sheet A-1). The northeastern Brooks Range has undergone signifi cant Ter-tiary exhumation and, as a result, this is the only area where the Early Cretaceous orogenic wedge and overlying basal foreland basin strata are well exposed in long, coherent sections. Formation and age designations remain problematic in these rocks, although we discovered several new occurrences of the key Valanginian coquinoid limestone marker bed. We also anticipate having improved criteria following biostratigraphic analyses and further petrographic examinations.

• Phosphatic/Manganiferous Shale—This informal stratigraphic unit remains enigmatic, despite its unique lithofacies that includes a conspicuous reddish-brown, metallic-weathering sheen. The unit underlies the cobblestone sandstone member of the Fortress Mountain Formation and is best known from the Cobblestone Creek area (Sheet A-1; Mull and others, in review). The unusual shale may record the change in basin polarity (sediment dispersal direction) and the onset of Brookian deposi-tion in this area, north of the advancing allochthons and Okpikruak fl ysch deposits. On the basis of stratigraphic position and limited biostratigraphic control, we speculate that the unit is correlative with the Kongakut Formation and Barremian Pebble Shale unit to the north (fi g. 2). To allow better evalu-ation of these hypotheses, detailed sedimentologic data were collected in 2007 from the best-exposed section along Cobblestone Creek. The interpreted correlation with the Pebble Shale was supported by the fi rst reported discovery of numerous outsized granules, pebbles, and cobbles fl oating within the shale. Further characterization of this interval awaits analytical data from newly collected petrographic, geochemical, and micropaleontology samples.

• Cobblestone Sandstone—The Aptian(?) Cobblestone Sandstone member of the Fortress Mountain Formation locally records the earliest sandstone deposition in the proximal foreland basin (Mull and others, in review). However, this distinctive lighter-weathering graywacke has not been recognized west of the Kanayut River (Harris and others, 2004). In 2007, we visited several key exposures of amalgamated sediment gravity fl ow deposits to collect additional sedimentologic and stratigraphic information. Most notably, an exposure along the Nanushuk River (Sheet A-1) included an unusual association of facies including poorly sorted conglomerate and breccia. The texturally immature facies, and clast composition were indistinguishable from a syntectonic unit we termed “Kfmv” in recent mapping farther west in the Siksikpuk River area (Peapples and others, 2007). This observation sup-ports our earlier speculation that the two units are correlative and likely represent gradational facies equivalents of one another. If additional data further substantiate this interpretation, it will allow us to construct a more coherent model for basin evolution in this wedge-top environment (for example, Wartes and Swenson, 2005).

• Fortress Mountain Formation—DGGS has supported several years of stratigraphic research on the Fortress Mountain Formation, resulting in refi ned depositional environment interpretations and strati-graphic correlations (at the local to sub-regional scales). An example of this work from the Atigun syncline area is included in this volume (fi g. 1; Sheet A-1; Wartes, 2008a, this volume). In collabora-tion with the USGS, another publication on the stratigraphy of the Fortress Mountain in the Siksikpuk River area should be published imminently (Houseknecht and others, 2007).

We conducted additional stratigraphic reconnaissance and sampling in 2007 near Toolik Lake (Sheet A-1). These are the northernmost exposures of the Fortress Mountain Formation in this area and have the potential to clarify the basinward evolution of this part of the clastic wedge. In particular, it remains unclear how this part of the upper(?) Fortress Mountain Formation relates to nearby exposures of the Nanushuk Formation. This important stratigraphic question is further addressed in another chapter in this volume through a comparison of detrital zircon ages within the two units (fi g. 1; Wartes, 2008b, this volume).


• Nanushuk Formation—DGGS has led a multi-year, outcrop-based investigation of the sequence stratigraphy and reservoir potential of the Nanushuk Formation. This work has resulted in numerous detailed measured sections throughout the central Brooks Range foothills and greatly improved our understanding of this depositional system. A major publication summarizing a substantial part of our Nanushuk investigations is now complete (LePain and others, 2008d) and will be released shortly after the publication of this volume. In addition to sequence stratigraphic analyses, this milestone synthesis includes a comprehensive summary of Nanushuk lithofacies, facies associations, ichnology, micro-paleontology, and regional depositional environments. During 2007, we conducted limited follow-up work on the Nanushuk at Slope Mountain (Sheet A-1). Our main focus was revisiting a signifi cant intraformational sequence boundary and better documenting the overlying facies association and erosional relief on the unconformity (LePain and others, 2008d).

We have also extended our Nanushuk studies westward in recent years, examining well exposed sec-tions along the Colville River (fi g. 1). Based on facies analysis, these exposures appear to refl ect the development of river-dominated deltas, contrasting with the more pervasive wave infl uence observed to the east (for example, LePain and others, 2006; Huffman and others, 1988). These measured sec-tions and preliminary correlations with publicly available seismic data are summarized in LePain and others (2008b) in this volume.

During our work along the Colville River, we sampled a gas seep in the Nanushuk Formation near the mouth of Aupuk Creek (fi g. 1). Based on new geochemical data from this seep, we were able to demonstrate the gas is thermogenic in origin and likely represents condensate- or oil-associated gas generated at oil-window maturity. These results are included in Decker and Wartes (2008, this vol-ume).

SUMMARYThe above discussion is intended only as a preliminary progress report that provides a brief introduction to

recent fi eld investigations, particularly during 2007. This volume is an effort to execute a rapid turn-around of many of our observations and preliminary interpretations, rather than delay distribution of data until all results are in. Additional work will be published as analytical data become available and as stratigraphic and structural interpretations continue to mature.

ACKNOWLEDGMENTSThis review incorporated the work of the entire geoscience team associated with the DNR North Slope Pro-

gram (listed under project staff in the text). C.G. Mull deserves special mention—much of our work would not be possible without the geological framework he established during decades of fi eld work in northern Alaska. D. LePain provided a helpful review of this manuscript. Finally, J. Robinson and P. Davis are thanked for their tireless editorial work in preparing this volume for publication.

Fieldwork was supported through a combination of state budget sources and substantial contributions from companies and individuals involved in the Alaska oil and gas industry. Recent sponsors included Anadarko Petro-leum Corp., BG Alaska, Chevron, ConocoPhillips Alaska, Inc., ENI, Petro-Canada, Pioneer Natural Resources, Repsol YPF Exploration and Production Co., Shell International Exploration and Production Co., and Talisman Energy, Inc.

REFERENCESAlaska Oil and Gas Conservation Commission, 1998, Conservation Order No. 430 (Tarn Pool Rules): Anchorage,

AK, 7 p.———2001, Conservation Order No. 456 (Meltwater Pool Rules): Anchorage, AK, 9 p.Cole, F.E., Bird, K.J., Toro, J., Roure, F., O’Sullivan, P.B., Pawlewicz, M.J., and Howell, D.G., 1997, An integrated

model for the frontal Brooks Range and Colville Basin 250 km west of the Trans-Alaska Crustal Transect: Journal of Geophysical Research, v. 102, p. 20,685–20,708.

DeCelles, P.G., and Giles, K.A., 1996, Foreland basin systems: Basin Research, v. 8, p. 105–123.


Decker, P.L., 2007, Brookian sequence stratigraphic correlations, Umiat Field to Milne Point Field, west-central North Slope, Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2007-2, 19 p., 1 sheet.

Decker, P.L., and Wartes, M.A., 2008, Geochemistry of the Aupuk gas seep along the Colville River—Evidence for a thermogenic origin, in Wartes, M.A., and Decker, P.L., eds., Preliminary results of recent geologic fi eld investigations in the Brooks Range foothills and North Slope, Alaska: Alaska Division of Geological & Geo-physical Surveys Preliminary Interpretive Report 2008-1, p. 47–53.

Decker, P.L., Wartes, M.A., Wallace, W.K., Houseknecht, David, Schenk, Christopher, Gillis, R.J., and Mongrain, Jacob, 2008, Stratigraphic and structural investigations in the Ivishak River and Gilead Creek areas: Progress during 2007, in Wartes, M.A., and Decker, P.L., eds, Preliminary results of recent geologic fi eld investigations in the Brooks Range foothills and North Slope, Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2008-1, p. 55–83, 1 sheet, measured section.

Harris, E.E., Mull, C.G., Montayne, S., and Reifenstuhl, R.R., 2002, Geologic map of the Dalton Highway (Atigun Gorge to Slope Mountain) area, southern Arctic Foothills, Alaska: Alaska Division of Geological & Geophysi-cal Surveys Preliminary Interpretive Report 2002-2, 1 sheet, scale 1:63,360.

Harris, E.E., Mull, C.G., Peapples, P.R., LePain, D.L., and Burns, P.A., 2004, New detailed (1:63,360-scale) map-ping of the Brooks Range northern foothills and rangefront, Kanayut River area, Alaska: AAPG Abstracts with Programs, v. 13, p. 58–59.

Houseknecht, D.W., 2003, Brookian stratigraphic plays in the National Petroleum Reserve—Alaska (NPRA): U.S. Geological Survey Open-File Report 2003-039, 19 p.

Houseknecht, D.W, and Schenk, C.J., 2005, Sedimentology and sequence stratigraphy of the Cretaceous Nanushuk, Seabee, and Tuluvak Formations exposed on Umiat Mountain, north-central Alaska, in Haeussler, P., and Gal-loway, J.P., eds., Studies by the U.S. Geological Survey in Alaska, 2004, U.S. Geological Survey Professional Paper 1709B, 18 p., 1 plate.

Houseknecht, D.W., Schenk, C.J., and Wartes, M.A., 2007, Sedimentology and sequence stratigraphy of the Lower Cretaceous Fortress Mountain and Torok Formations exposed along the Siksikpuk River, north-central Alaska, in Haeussler, Peter J., and Galloway, John P., eds., Studies by the U.S. Geological Survey in Alaska, 2006: U.S. Geological Survey Professional Paper 1739-D, 27 p., 1 plate.

Huffman, A.C., Jr., Ahlbrandt, T.S., and Bartsch-Winkler, Susan, 1988, Sedimentology of the Nanushuk Group, North Slope, in Gryc, George, ed., Geology and exploration of the National Petroleum Reserve in Alaska, 1974 to 1982: U.S. Geological Survey Professional Paper 1399, p. 281–298.

LePain, D.L., Decker, P.L., and Wartes, M.A., 2008a, Turonian–Campanian strata east of the Trans-Alaska Pipeline corridor, North Slope foothills, Alaska: Progress during the 2001–02 and 2007 fi eld seasons, in Wartes, M.A., and Decker, P.L., eds, Preliminary results of recent geologic fi eld investigations in the Brooks Range foothills and North Slope, Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2008-1, p. 85–134.

LePain, D.L., Decker, P.L., and Wartes, M.A., 2008b, Measured sections and preliminary interpretations of the Nanushuk Formation exposed along the Colville River near the confl uences with the Awuna and Killik rivers, in Wartes, M.A., and Decker, P.L., eds, Preliminary results of recent geologic fi eld investigations in the Brooks Range foothills and North Slope, Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2008-1, p. 41–45, 4 sheets.

LePain, D.L., Decker, P.L., Wartes, M.A., Gillis, R.J., Mongrain, J.R., Kirkham, R., and Shellenbaum, D.P., 2008c, Sedimentology and Stratigraphy of Upper Cretaceous strata in the Sagavanirktok River area, east-central North Slope, Alaska: AAPG annual meeting abstracts, in press.

LePain, D.L., McCarthy, P.J., and Kirkham, R. 2006, Variations in facies stacking patterns in storm-infl uenced delta front and shoreface successions, Nanushuk Formation, central North Slope, Alaska [abs.]: Geological Society of America Abstracts with Program, v. 38, no. 5.

———2008d, Sedimentology and sequence stratigraphy of the Nanushuk Formation in the central Brooks Range foothills, northern Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation, in press.

LePain, D.L., Kirkham, R., and McCarthy, P.J., 2002, Shoreline to basin transition (?) in Albian–Cenomanian strata east of the Sagavanirktok River, Brooks Range foothills, Alaska [abs.]: AAPG Pacifi c Section/SPE Regional Conference, Program and Abstracts, p. 87.


Molenaar, C.M., Bird, K.J., and Collett, T.S., 1986, Regional correlation sections across the North Slope of Alaska: U.S. Geological Survey Miscellaneous Field Studies 1907, 1 sheet.

Molenaar, C.M., Bird, K.J., and Kirk, A.R., 1987, Cretaceous and Tertiary stratigraphy of northeastern Alaska, in Tailleur, I.L., and Weimer, P., eds., Alaskan North Slope Geology: Pacifi c Section, Society of Economic Paleontologists and Mineralogists and Alaska Geological Society, Book 50, v. 1, p. 513–528.

Molenaar, C.M., 1988, Depositional history and seismic stratigraphy of Lower Cretaceous rock in the National Petroleum Reserve in Alaska and adjacent areas, in Gryc, G., editor, Geology and exploration of the National Petroleum Reserve in Alaska, 1974–1982: U.S. Geological Survey Professional Paper 1399, p. 593–621.

Mull, C.G., 1989, Road log from Chandalar Shelf (Mile 237.1) to Prudhoe Bay (Mile 414), in Mull, C.G., and Adams, K.E., eds., Dalton Highway, Yukon River to Prudhoe Bay, Alaska: Alaska Division of Geological & Geophysical Surveys Guidebook 7, v. 1, p. 101–131.

Mull, C.G., Harris, E.E., Reifenstuhl, R.R., and Moore, T.E., 2000, Geologic map of the Coke Basin–Kukpowruk River area, DeLong Mountains D-2 and D-3 quadrangles, northwestern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 2000-2, 1 sheet, scale 1:63,360.

Mull, C.G, Houseknecht, D.W., and Bird, K.J., 2003, Revised Cretaceous and Tertiary Stratigraphic Nomenclature in the Colville Basin, Northern Alaska: U.S. Geological Survey Professional Paper 1673, 51 p.

Mull, C.G., Houseknecht, D.W., Pessel, G.H., and Garrity, C.P., 2004, Geologic map of the Umiat Quadrangle, Alaska: U.S. Geological Survey Scientifi c Investigations Map 2817-A, 1 sheet.

Mull, C.G., Harris, E.E., and Peapples, P.R., in review, Geologic map of the Cobblestone Creek–May Creek area, east-central Brooks Range foothills, Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report, 1 sheet, scale 1:63,360, and booklet.

Peapples, P.R., Wallace, W.K., Wartes, M.A., Swenson, R.F., Mull, C.G., Dumoulin, J.A., Harris, E.E., Finzel, E.S., Reifenstuhl, R.R., and Loveland, A.M., 2007, Geologic map of the Siksikpuk River area, Chandler Lake Quadrangle, Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2007-1, 1 sheet.

Pessel, G.H., Robinson, M.S., Clough, J.G., Imm, T.A., Reifenstuhl, R.R., Ryherd, T.J., Myers, M.D., and Mull, C.G., 1990, Preliminary geologic map of the Gilead Creek area, Sagavanirktok A-2 Quadrangle, Arctic Foothills, Alaska: Alaska Division of Geological & Geophysical Surveys Public-Data File 90-18, 7 p., 1 sheet.

Reifenstuhl, R.R., 1991, Gilead sandstone, northeastern Brooks Range, Alaska; An Albian to Cenomanian marine clastic succession, in Reger, R.D., ed., Short Notes on Alaskan Geology 1991: Alaska Division of Geological & Geophysical Surveys Professional Report 111, p. 69–76.

Wartes, M.A., 2008a, Measured section and facies analysis of the Lower Cretaceous Fortress Mountain Formation, Atigun Syncline, northern Alaska, in Wartes, M.A., and Decker, P.L., eds, Preliminary results of recent geologic fi eld investigations in the Brooks Range foothills and North Slope, Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2008-1, p. 11–24, 1 sheet.

Wartes, M.A., 2008b, Evaluation of stratigraphic continuity between the Fortress Mountain and Nanushuk For-mations in the Central Brooks Range foothills—Are they partly correlative?, in Wartes, M.A., and Decker, P.L., eds, Preliminary results of recent geologic fi eld investigations in the Brooks Range foothills and North Slope, Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2008-1, p. 25–39.

Wartes, M.A., and Swenson, R.F., 2005, New constraints on the structural and stratigraphic development of the proximal Colville foreland basin; Implications for burial history and oil and gas exploration in the central Brooks Range foothills, northern Alaska, in GSA, Cordilleran Section, 101st annual meeting: AAPG, Pacifi c Section, 80th annual meeting, Abstracts with Programs, v. 37, no. 4, p. 92–93.

Text for reports with appendices: This appendix is included in this PDF document for the reader’s convenience. In the full publication, the appendices and sheets are placed at the conclusion of all of the text. The separation of the appendices and sheets from their chapter in the full publication determines the page numbers; thus, you will find that the page numbers for this smaller piece of the larger document are not sequential.

Appendix A-1 135

APPENDIX A-1

2007 NORTH SLOPE FIELD TOUR

This page has intentionally been left blank.

Appendix A-1 137

Intr

oduc

tory

Com

men

ts:

Intr

oduc

tory

Com

men

ts:

The

Ala

ska

Div

isio

n of

Geo

logi

cal &

Geo

phys

ical

Sur

veys

(DG

GS)

Th

e A

lask

a D

ivis

ion

of G

eolo

gica

l & G

eoph

ysic

al S

urve

ys (D

GG

S) a

nd D

ivis

ion

of

and

Div

isio

n of

O

il &

Gas

(DO

G) l

eads

an

annu

al tw

oO

il &

Gas

(DO

G) l

eads

an

annu

al tw

o --da

y fie

ld tr

ip in

the

foot

hills

of t

he

day

field

trip

in th

e fo

othi

lls o

f the

no

rthe

rn B

rook

s R

ange

. Th

is to

ur ty

pica

lly fo

cuse

s on

key

exp

osno

rthe

rn B

rook

s R

ange

. Th

is to

ur ty

pica

lly fo

cuse

s on

key

exp

osur

es th

at

ures

that

pr

ovid

e in

sigh

t int

o th

e ge

olog

ic e

volu

tion

of th

e pe

trol

eum

sys

prov

ide

insi

ght i

nto

the

geol

ogic

evo

lutio

n of

the

petr

oleu

m s

yste

m in

nor

ther

n te

m in

nor

ther

n A

lask

a.A

lask

a.

In 2

007,

this

tour

took

pla

ce o

n Ju

ne 2

9In

200

7, th

is to

ur to

ok p

lace

on

June

29t

hthan

d 30

and

30thth

, bas

ed o

ut o

f Gal

brai

th L

ake

in

, bas

ed o

ut o

f Gal

brai

th L

ake

in

the

east

the

east

-- cen

tral

foot

hills

. O

n Ju

ne 2

8ce

ntra

l foo

thill

s. O

n Ju

ne 2

8thth, a

pre

sent

atio

n w

as o

ffere

d th

at b

riefly

, a

pre

sent

atio

n w

as o

ffere

d th

at b

riefly

su

mm

ariz

ed re

cent

geo

logi

cal s

tudi

es b

y D

GG

S an

d pr

evie

wed

upc

omsu

mm

ariz

ed re

cent

geo

logi

cal s

tudi

es b

y D

GG

S an

d pr

evie

wed

upc

omin

g fie

ld

ing

field

st

ops.

stop

s.

The

follo

win

g pr

esen

tatio

n w

as c

reat

ed a

nd d

eliv

ered

by

Mar

wan

WTh

e fo

llow

ing

pres

enta

tion

was

cre

ated

and

del

iver

ed b

y M

arw

an W

arte

s (D

GG

S)

arte

s (D

GG

S)

with

hel

p fr

om P

aul D

ecke

r (D

OG

). T

he v

ersi

on in

clud

ed h

ere

is

with

hel

p fr

om P

aul D

ecke

r (D

OG

). T

he v

ersi

on in

clud

ed h

ere

is o

nly

slig

htly

on

ly s

light

ly

mod

ified

from

the

orig

inal

; in

the

abse

nce

of a

spe

aker

, som

e sl

mod

ified

from

the

orig

inal

; in

the

abse

nce

of a

spe

aker

, som

e sl

ides

hav

e be

en

ides

hav

e be

en

anno

tate

d to

impr

ove

clar

ity.

anno

tate

d to

impr

ove

clar

ity.

Mar

wan

War

tes

(DG

GS

)

E-m

ail:

mar

wan

.war

tes@

alas

ka.g

ov

Pho

ne: (

907)

451

-505

6

Pau

l Dec

ker (

DO

G)

E-m

ail:

paul

.dec

ker@

alas

ka.g

ov

Pho

ne: (

907)

269

-879

1

For m

ore

info

rmat

ion,

ple

ase

cont

act:

For m

ore

info

rmat

ion,

ple

ase

cont

act:

This

pre

sent

atio

n be

nefit

ed fr

om a

n in

tern

al D

GG

S re

view

by

Dav

id L

ePai

n

138 PIR 2008-1 Preliminary results, fi eld investigations, Brooks Range Foothils & North Slope, Alaska

DG

GS

/ DO

G 2

007

Nor

th S

lope

Fie

ld T

our

DG

GS

/ DO

G 2

007

Nor

th S

lope

Fie

ld T

our

Appendix A-1 139

Bro

oks

Ran

ge F

ooth

ills

& N

orth

Slo

pe P

rogr

amB

rook

s R

ange

Foo

thill

s &

Nor

th S

lope

Pro

gram

Stra

tigra

phic

and

stru

ctur

al

Stra

tigra

phic

and

stru

ctur

al

stud

ies

of e

cono

mic

ally

st

udie

s of

eco

nom

ical

ly

sign

ifica

nt u

nits

sign

ifica

nt u

nits

Cha

ract

eriz

atio

n of

the

Cha

ract

eriz

atio

n of

the

regi

onal

pet

role

um s

yste

m

regi

onal

pet

role

um s

yste

m

(sou

rce

rock

geo

chem

istry

(s

ourc

e ro

ck g

eoch

emis

try

and

rese

rvoi

r qua

lity)

and

rese

rvoi

r qua

lity)

Det

aile

d 1:

63,3

60D

etai

led

1:63

,360

-- sca

lesc

ale

geol

ogic

map

ping

of

geol

ogic

map

ping

of

econ

omic

ally

sig

nific

ant

econ

omic

ally

sig

nific

ant

area

sar

eas

Sci

entif

ic a

nd lo

gist

ical

sup

port

for

Sci

entif

ic a

nd lo

gist

ical

sup

port

for

stud

ent t

hese

sst

uden

t the

ses

Fund

ing

sour

ces

Fund

ing

sour

ces

DG

GS

gen

eral

fund

D

GG

S g

ener

al fu

nd

Sta

te C

IPS

tate

CIP

Fede

ral S

tate

Map

Fe

dera

l Sta

teM

ap

Indu

stry

con

sorti

um p

ays

for

Indu

stry

con

sorti

um p

ays

for

oper

atio

nal e

xpen

ses

and

oper

atio

nal e

xpen

ses

and

inte

rn s

uppo

rtin

tern

sup

port


2007

Indu

stry

Sup

port

2007

Indu

stry

Sup

port

Ana

dark

oA

nada

rko

FEX

FEX

BG

Ala

ska

BG

Ala

ska

Che

vron

Che

vron

Petr

oPe

tro --

Can

ada

Can

ada

Pion

eer N

atur

al R

esou

rces

Pion

eer N

atur

al R

esou

rces

ENI

ENI

Shel

lSh

ell

Con

ocoP

hilli

psC

onoc

oPhi

llips

Appendix A-1 141

Prim

ary

Inve

stig

ator

s / C

olla

bora

tors

Prim

ary

Inve

stig

ator

s / C

olla

bora

tors

DG

GS

DG

GS M

. War

tes

M. W

arte

sD

. LeP

ain

D. L

ePai

n R

. Rei

fens

tuhl

R. R

eife

nstu

hlR

. Gill

isR

. Gill

isR

. Sw

enso

n R

. Sw

enso

n P.

Del

aney

P.

Del

aney

A

. Lov

elan

d A

. Lov

elan

d

DO

GD

OG

P. D

ecke

rP.

Dec

ker

K. H

elm

old

K. H

elm

old

D. S

helle

nbau

mD

. She

llenb

aum

UA

FU

AF

W. W

alla

ceW

. Wal

lace

M. W

hale

nM

. Wha

len

P. M

cCar

thy

P. M

cCar

thy

Stud

ents

Stud

ents

D. v

an d

er K

olk

D. v

an d

er K

olk

P. F

laig

P. F

laig

J. M

ongr

ain

J. M

ongr

ain

A. D

unca

nA

. Dun

can

USG

SU

SGS J.

Dum

oulin

J. D

umou

linD

. Hou

sekn

echt

D. H

ouse

knec

htC

. Sch

enk

C. S

chen

kT.

Moo

reT.

Moo

reC

. Pot

ter

C. P

otte

r

Con

sulta

ntC

onsu

ltant

G. M

ull

G. M

ull

Appendix A-1 143

Bro

okia

n Se

quen

ce S

trat

igra

phic

Cro

ss S

ectio

nB

rook

ian

Sequ

ence

Str

atig

raph

ic C

ross

Sec

tion

(Dec

ker,

2007

)


NPR

AN

PRA

AN

WR

AN

WR

Loca

tion

Map

CO

LVIL

LEC

OLV

ILLE

BA

SIN

BA

SIN

BR

OO

KS

BR

OO

KS

RA

NG

ER

AN

GEBA

RRO

WBA

RRO

W““A

RCH

ARCH

””

Appendix A-1 145

2007

DG

GS

2007

DG

GS

Tour

Loc

aliti

esTo

ur L

ocal

ities

Day

1D

ay 1

Stop

1.1

For

tres

s M

tn F

m

Stop

1.1

For

tres

s M

tn F

m

fan

delta

, fa

n de

lta,

Atig

un s

yncl

ine

Atig

un s

yncl

ine

Stop

1.2

Nan

ushu

k Fm

St

op 1

.2 N

anus

huk

Fm

shor

efac

e,sh

oref

ace,

Slop

e M

ount

ain

Slop

e M

ount

ain

Stop

1.3

Nan

ushu

k Fm

St

op 1

.3 N

anus

huk

Fm

fluvi

al,

fluvi

al,

NE

of Ic

ecut

NE

of Ic

ecut

Stop

1.4

Tor

ok F

m

Stop

1.4

Tor

ok F

m

turb

idite

s,tu

rbid

ites,

Sag

/ Lup

ine

Riv

erSa

g / L

upin

e R

iver

2007

cam

p –

Gal

brai

th L

ake

1.2

1.1

1.1

1.3

1.4


CRETACEOUSTERTIARY

Stop

1.1

Stop

1.1

Fort

ress

Mou

ntai

nFo

rtre

ss M

ount

ain

Form

atio

nFo

rmat

ion

Mul

l et a

l., 2

003

Appendix A-1 147

Stop

1.1

For

tres

s M

tn F

orm

atio

n St

op 1

.1 F

ortr

ess

Mtn

For

mat

ion

––A

tigun

Syn

clin

e A

tigun

Syn

clin

e A

ptia

n(?)

Apt

ian(

?)-- A

lbia

n pr

oxim

al to

pset

faci

es (f

an d

elta

fron

t)A

lbia

n pr

oxim

al to

pset

faci

es (f

an d

elta

fron

t)B

asin

war

d di

ppin

g fo

rese

tsB

asin

war

d di

ppin

g fo

rese

ts


Stop

1.1

For

tres

s M

tn F

orm

atio

n St

op 1

.1 F

ortr

ess

Mtn

For

mat

ion

––A

tigun

Syn

clin

e A

tigun

Syn

clin

e A

ptia

n(?)

Apt

ian(

?)-- A

lbia

n pr

oxim

al to

pset

faci

es (f

an d

elta

fron

t)A

lbia

n pr

oxim

al to

pset

faci

es (f

an d

elta

fron

t)B

asin

war

d di

ppin

g fo

rese

tsB

asin

war

d di

ppin

g fo

rese

ts

Appendix A-1 149

2007

DG

GS

2007

DG

GS

Tour

Loc

aliti

esTo

ur L

ocal

ities

Day

1D

ay 1

Stop

1.1

For

tres

s M

tn F

m

Stop

1.1

For

tres

s M

tn F

m

fan

delta

, fa

n de

lta,

Atig

un s

yncl

ine

Atig

un s

yncl

ine

Stop

1.2

Nan

ushu

k Fm

St

op 1

.2 N

anus

huk

Fm

shor

efac

e,sh

oref

ace,

Slop

e M

ount

ain

Slop

e M

ount

ain

Stop

1.3

Nan

ushu

k Fm

St

op 1

.3 N

anus

huk

Fm

fluvi

al,

fluvi

al,

NE

of

NE

of Ic

ecut

Icec

ut

Stop

1.4

Tor

ok F

m

Stop

1.4

Tor

ok F

m

turb

idite

s,tu

rbid

ites,

Sag

/ Lup

ine

Riv

erSa

g / L

upin

e R

iver

2007

cam

p –

Gal

brai

th L

ake

1.2

1.1

1.1

1.3

1.4


CRETACEOUSTERTIARY

Stop

1.2

Stop

1.2

Nan

ushu

kN

anus

huk

Form

atio

nFo

rmat

ion

Mul

l et a

l., 2

003

Appendix A-1 151

Stop

1.2

Nan

ushu

k Fo

rmat

ion

Stop

1.2

Nan

ushu

k Fo

rmat

ion

––Sl

ope

Mou

ntai

n Sl

ope

Mou

ntai

n A

lbia

n to

pset

faci

es (s

hore

face

A

lbia

n to

pset

faci

es (s

hore

face

––di

strib

utar

y ch

anne

l)di

strib

utar

y ch

anne

l)Er

osio

nal s

eque

nce

boun

dary

Eros

iona

l seq

uenc

e bo

unda

ry


2007

DG

GS

2007

DG

GS

Tour

Loc

aliti

esTo

ur L

ocal

ities

Day

1D

ay 1

Stop

1.1

For

tres

s M

tn F

m

Stop

1.1

For

tres

s M

tn F

m

fan

delta

, fa

n de

lta,

Atig

un s

yncl

ine

Atig

un s

yncl

ine

Stop

1.2

Nan

ushu

k Fm

St

op 1

.2 N

anus

huk

Fm

shor

efac

e,sh

oref

ace,

Slop

e M

ount

ain

Slop

e M

ount

ain

Stop

1.3

Nan

ushu

k Fm

St

op 1

.3 N

anus

huk

Fm

fluvi

al,

fluvi

al,

NE

of

NE

of Ic

ecut

Icec

ut

Stop

1.4

Tor

ok F

m

Stop

1.4

Tor

ok F

m

turb

idite

s,tu

rbid

ites,

Sag

/ Lup

ine

Riv

erSa

g / L

upin

e R

iver

2007

cam

p –

Gal

brai

th L

ake

1.2

1.1

1.1

1.3

1.4

Appendix A-1 153

CRETACEOUSTERTIARY

Stop

1.3

Stop

1.3

Nan

ushu

k(?)

Nan

ushu

k(?)

Form

atio

nFo

rmat

ion

Mul

l et a

l., 2

003


Stop

1.3

Nan

ushu

k Fo

rmat

ion

Stop

1.3

Nan

ushu

k Fo

rmat

ion

––N

E of

Ice

Cut

NE

of Ic

e C

utFl

uvia

l (?)

Fl

uvia

l (?)

––co

nstr

aini

ng th

e te

rmin

al s

helf

cons

trai

ning

the

term

inal

she

lf --ed

geed

ge

Appendix A-1 155

2007

DG

GS

2007

DG

GS

Tour

Loc

aliti

esTo

ur L

ocal

ities

Day

1D

ay 1

Stop

1.1

For

tres

s M

tn F

m

Stop

1.1

For

tres

s M

tn F

m

fan

delta

, fa

n de

lta,

Atig

un s

yncl

ine

Atig

un s

yncl

ine

Stop

1.2

Nan

ushu

k Fm

St

op 1

.2 N

anus

huk

Fm

shor

efac

e,sh

oref

ace,

Slop

e M

ount

ain

Slop

e M

ount

ain

Stop

1.3

Nan

ushu

k Fm

St

op 1

.3 N

anus

huk

Fm

fluvi

al,

fluvi

al,

NE

of

NE

of Ic

ecut

Icec

ut

Stop

1.4

Tor

ok F

m

Stop

1.4

Tor

ok F

m

turb

idite

s,tu

rbid

ites,

Sag

/ Lup

ine

Riv

erSa

g / L

upin

e R

iver

2007

cam

p –

Gal

brai

th L

ake

1.2

1.1

1.1

1.31.4


CRETACEOUSTERTIARY

Stop

1.4

Stop

1.4 To

rok(

?)To

rok(

?)Fo

rmat

ion

Form

atio

n

Mul

l et a

l., 2

003

Appendix A-1 157

Stop

1.4

Tor

ok(?

) For

mat

ion

Stop

1.4

Tor

ok(?

) For

mat

ion

––Sa

gava

nirk

tok

Riv

er

Saga

vani

rkto

k R

iver

ne

ar L

upin

e R

iver

con

fluen

ce

near

Lup

ine

Riv

er c

onflu

ence

Se

dim

ent g

ravi

ty fl

ows

(am

alga

mat

ed tu

rbid

ites)

Sedi

men

t gra

vity

flow

s (a

mal

gam

ated

turb

idite

s)C

orre

latio

n to

Lup

ine

wel

l(?)

Cor

rela

tion

to L

upin

e w

ell(?

)


2007

DG

GS

2007

DG

GS

Tour

Loc

aliti

esTo

ur L

ocal

ities

Day

2D

ay 2

Stop

2.1

Gile

ad S

s (T

orok

Fm

) St

op 2

.1 G

ilead

Ss

(Tor

ok F

m)

turb

idite

s,tu

rbid

ites,

Ivis

hak

Riv

erIv

isha

k R

iver

Stop

2.2

Sea

bee

Fm

Stop

2.2

Sea

bee

Fm

turb

idite

s, H

ue S

hale

tu

rbid

ites,

Hue

Sha

le

equi

vale

nt s

ourc

e, &

equi

vale

nt s

ourc

e, &

basa

l Can

ning

Fm

ba

sal C

anni

ng F

m

stru

ctur

e,st

ruct

ure,

““ Sag

asha

k C

reek

Saga

shak

Cre

ek””

Stop

2.3

Can

ning

Fm

St

op 2

.3 C

anni

ng F

m

turb

idite

s,tu

rbid

ites,

““ Sag

asha

k C

reek

Saga

shak

Cre

ek””

Stop

2.4

Sch

rade

r Blu

ff St

op 2

.4 S

chra

der B

luff

nonm

arin

eno

nmar

ine

to s

hallo

w m

arin

e,

to s

hallo

w m

arin

e,

Tool

ik R

iver

Tool

ik R

iver

2007

cam

p –

Gal

brai

th L

ake

2.1

2.1

2.2 2.3

2.4

Appendix A-1 159

CRETACEOUSTERTIARY

Stop

2.1

Stop

2.1

Gile

ad s

ands

tone

Gile

ad s

ands

tone

(Tor

ok F

orm

atio

n)(T

orok

For

mat

ion)

Mul

l et a

l., 2

003


Stop

2.1

Gile

ad S

s (T

orok

Fm

) St

op 2

.1 G

ilead

Ss

(Tor

ok F

m) ––

Ivis

hak

Riv

er

Ivis

hak

Riv

er

Alb

ian(

?) s

edim

ent g

ravi

ty fl

ows

(am

alga

mat

ed tu

rbid

ites)

Alb

ian(

?) s

edim

ent g

ravi

ty fl

ows

(am

alga

mat

ed tu

rbid

ites)

Appendix A-1 161

Stop

2.1

Gile

ad S

s (T

orok

Fm

) St

op 2

.1 G

ilead

Ss

(Tor

ok F

m) ––

Ivis

hak

Riv

er

Ivis

hak

Riv

er

Alb

ian(

?) s

edim

ent g

ravi

ty fl

ows

(am

alga

mat

ed tu

rbid

ites)

Alb

ian(

?) s

edim

ent g

ravi

ty fl

ows

(am

alga

mat

ed tu

rbid

ites)


2007

DG

GS

2007

DG

GS

Tour

Loc

aliti

esTo

ur L

ocal

ities

Day

2D

ay 2

Stop

2.1

Gile

ad S

s (T

orok

Fm

) St

op 2

.1 G

ilead

Ss

(Tor

ok F

m)

turb

idite

s,tu

rbid

ites,

Ivis

hak

Riv

erIv

isha

k R

iver

Stop

2.2

Sea

bee

Fm

Stop

2.2

Sea

bee

Fm

turb

idite

s, H

ue S

hale

tu

rbid

ites,

Hue

Sha

le

equi

vale

nt s

ourc

e, &

equi

vale

nt s

ourc

e, &

basa

l Can

ning

Fm

ba

sal C

anni

ng F

m

stru

ctur

e,st

ruct

ure,

““ Sag

asha

k C

reek

Saga

shak

Cre

ek””

Stop

2.3

Can

ning

Fm

St

op 2

.3 C

anni

ng F

m

turb

idite

s,tu

rbid

ites,

““ Sag

asha

k C

reek

Saga

shak

Cre

ek””

Stop

2.4

Sch

rade

r Blu

ff St

op 2

.4 S

chra

der B

luff

nonm

arin

eno

nmar

ine

to s

hallo

w m

arin

e,

to s

hallo

w m

arin

e,

Tool

ik R

iver

Tool

ik R

iver

2007

cam

p –

Gal

brai

th L

ake

2.1

2.2

2.2

2.3

2.4

Appendix A-1 163

CRETACEOUSTERTIARY

Stop

2.2

Stop

2.2

Seab

ee &

Can

ning

Seab

ee &

Can

ning

form

atio

nsfo

rmat

ions

Mul

l et a

l., 2

003


Turo

nian

Sea

bee

FmTu

roni

an S

eabe

e Fm

Cam

pani

an C

anni

ng F

mCa

mpa

nian

Can

ning

Fm

basi

nal t

o to

eba

sina

l to

toe --

ofof-- s

lope

slop

efa

cies

faci

esba

sina

l to

toe

basi

nal t

o to

e --ofof

-- slo

pesl

ope

faci

esfa

cies

slop

e fa

cies

slop

e fa

cies

Stop

2.2

& 2

.3 S

eabe

e &

Can

ning

St

op 2

.2 &

2.3

Sea

bee

& C

anni

ng fm

sfm

s----

““ Sag

asha

k C

kSa

gash

ak C

k ””So

uth

limb

of A

ufei

s an

ticlin

eSo

uth

limb

of A

ufei

s an

ticlin

e

2.2

2.2

2.3

2.3 Vi

ew t

o ea

stVi

ew t

o ea

st

Appendix A-1 165

Stop

2.2

Sea

bee

& C

anni

ng

Stop

2.2

Sea

bee

& C

anni

ng fm

sfm

s----

““ Sag

asha

k C

reek

Saga

shak

Cre

ek””

Turo

nian

Turo

nian

-- San

toni

anSa

nton

ian

to e

arly

Cam

pani

an(?

) tur

bidi

tes

to e

arly

Cam

pani

an(?

) tur

bidi

tes

Tuffa

ceou

s, o

il sa

tura

ted

inte

rval

(com

plex

str

uctu

re)

Tuffa

ceou

s, o

il sa

tura

ted

inte

rval

(com

plex

str

uctu

re)

Oil

satu

rate

dtu

fface

ous

Oil

satu

rate

dtu

fface

ous

orga

nic

rich

shal

e&

silts

tone

orga

nic

rich

shal

e&

silts

tone


2007

DG

GS

2007

DG

GS

Tour

Loc

aliti

esTo

ur L

ocal

ities

Day

2D

ay 2

Stop

2.1

Gile

ad S

s (T

orok

Fm

) St

op 2

.1 G

ilead

Ss

(Tor

ok F

m)

turb

idite

s,tu

rbid

ites,

Ivis

hak

Riv

erIv

isha

k R

iver

Stop

2.2

Sea

bee

Fm

Stop

2.2

Sea

bee

Fm

turb

idite

s, H

ue S

hale

tu

rbid

ites,

Hue

Sha

le

equi

vale

nt s

ourc

e, &

equi

vale

nt s

ourc

e, &

basa

l Can

ning

Fm

ba

sal C

anni

ng F

m

stru

ctur

e,st

ruct

ure,

““ Sag

asha

k C

reek

Saga

shak

Cre

ek””

Stop

2.3

Can

ning

Fm

St

op 2

.3 C

anni

ng F

m

turb

idite

s,tu

rbid

ites,

““ Sag

asha

k C

reek

Saga

shak

Cre

ek””

Stop

2.4

Sch

rade

r Blu

ff St

op 2

.4 S

chra

der B

luff

nonm

arin

eno

nmar

ine

to s

hallo

w m

arin

e,

to s

hallo

w m

arin

e,

Tool

ik R

iver

Tool

ik R

iver

2007

cam

p –

Gal

brai

th L

ake

2.1

2.2 2.3

2.3

2.4

Appendix A-1 167

CRETACEOUSTERTIARY

Stop

2.3

Stop

2.3 Can

ning

Can

ning

Form

atio

nFo

rmat

ion

Mul

l et a

l., 2

003


Turo

nian

Sea

bee

FmTu

roni

an S

eabe

e Fm

Cam

pani

an C

anni

ng F

mCa

mpa

nian

Can

ning

Fm

basi

nal t

o to

eba

sina

l to

toe --

ofof-- s

lope

slop

efa

cies

faci

esba

sina

l to

toe

basi

nal t

o to

e --ofof

-- slo

pesl

ope

faci

esfa

cies

slop

e fa

cies

slop

e fa

cies

Stop

2.2

& 2

.3 S

eabe

e &

Can

ning

St

op 2

.2 &

2.3

Sea

bee

& C

anni

ng fm

sfm

s----

““ Sag

asha

k C

kSa

gash

ak C

k ””So

uth

limb

of A

ufei

s an

ticlin

eSo

uth

limb

of A

ufei

s an

ticlin

e

2.2

2.2

2.3

2.3 Vi

ew t

o ea

stVi

ew t

o ea

st

Appendix A-1 169

Stop

2.3

Can

ning

For

mat

ion

Stop

2.3

Can

ning

For

mat

ion

----““ S

agas

hak

Cre

ekSa

gash

ak C

reek

””C

ampa

nian

turb

idite

s C

ampa

nian

turb

idite

s co

nglo

mer

ate

sedi

men

t gra

vity

flow

sco

nglo

mer

ate

sedi

men

t gra

vity

flow

s


Stop

2.3

Can

ning

For

mat

ion

Stop

2.3

Can

ning

For

mat

ion

----““ S

agas

hak

Cre

ekSa

gash

ak C

reek

””C

ampa

nian

turb

idite

s C

ampa

nian

turb

idite

s co

nglo

mer

ate

sedi

men

t gra

vity

flow

sco

nglo

mer

ate

sedi

men

t gra

vity

flow

s

Appendix A-1 171

2007

DG

GS

2007

DG

GS

Tour

Loc

aliti

esTo

ur L

ocal

ities

Day

2D

ay 2

Stop

2.1

Gile

ad S

s (T

orok

Fm

) St

op 2

.1 G

ilead

Ss

(Tor

ok F

m)

turb

idite

s,tu

rbid

ites,

Ivis

hak

Riv

erIv

isha

k R

iver

Stop

2.2

Sea

bee

Fm

Stop

2.2

Sea

bee

Fm

turb

idite

s, H

ue S

hale

tu

rbid

ites,

Hue

Sha

le

equi

vale

nt s

ourc

e, &

equi

vale

nt s

ourc

e, &

basa

l Can

ning

Fm

ba

sal C

anni

ng F

m

stru

ctur

e,st

ruct

ure,

““ Sag

asha

k C

reek

Saga

shak

Cre

ek””

Stop

2.3

Can

ning

Fm

St

op 2

.3 C

anni

ng F

m

turb

idite

s,tu

rbid

ites,

““ Sag

asha

k C

reek

Saga

shak

Cre

ek””

Stop

2.4

Sch

rade

r Blu

ff Fm

St

op 2

.4 S

chra

der B

luff

Fm

nonm

arin

e to

sha

llow

no

nmar

ine

to s

hallo

w

mar

ine,

m

arin

e,

Tool

ik R

iver

Tool

ik R

iver

2007

cam

p –

Gal

brai

th L

ake

2.1

2.2

2.3

2.4

2.4


CRETACEOUSTERTIARY

Stop

2.4

Stop

2.4

Schr

ader

Blu

ff Sc

hrad

er B

luff

Form

atio

nFo

rmat

ion

Mul

l et a

l., 2

003

Appendix A-1 173

Stop

2.4

Too

lik R

iver

St

op 2

.4 T

oolik

Riv

er ––

Schr

ader

Blu

ff Fo

rmat

ion

Schr

ader

Blu

ff Fo

rmat

ion

Shal

low

mar

ine

Shal

low

mar

ine

tops

ets

tops

ets

––sh

oref

ace

para

sequ

ence

ssh

oref

ace

para

sequ

ence

s


Stop

2.4

Too

lik R

iver

St

op 2

.4 T

oolik

Riv

er ––

Schr

ader

Blu

ff Fo

rmat

ion

Schr

ader

Blu

ff Fo

rmat

ion

Shal

low

mar

ine

Shal

low

mar

ine

tops

ets

tops

ets

––sh

oref

ace

para

sequ

ence

ssh

oref

ace

para

sequ

ence

s

Appendix A-1 175

Safe

ty C

onsi

dera

tions

. . .

Safe

ty C

onsi

dera

tions

. . .

Hel

icop

ter a

war

enes

sH

elic

opte

r aw

aren

ess

Roc

k ha

mm

erin

gR

ock

ham

mer

ing

Pay

atte

ntio

n to

thos

e be

low

you

Pay

atte

ntio

n to

thos

e be

low

you

Loos

e an

d fa

lling

rock

sLo

ose

and

falli

ng ro

cks

Wild

life

(bea

rs, f

oxes

, rap

tors

, etc

.)W

ildlif

e (b

ears

, fox

es, r

apto

rs, e

tc.)

Gra

tuito

us b

lood

y kn

uckl

e. .

.G

ratu

itous

blo

ody

knuc

kle.

. .


Tour

Sch

edul

e / L

ogis

tics

Tour

Sch

edul

e / L

ogis

tics

Sign

Sign

-- in s

heet

dur

ing

June

28t

h ev

enin

g ov

ervi

ew s

essi

onin

she

et d

urin

g Ju

ne 2

8th

even

ing

over

view

ses

sion

Bre

akfa

st s

tart

s at

~ 6

:30

AM

(7:0

0 A

M is

fine

too.

. .)

Bre

akfa

st s

tart

s at

~ 6

:30

AM

(7:0

0 A

M is

fine

too.

. .)

Pick

up

sand

wic

h an

d ot

her l

unch

fixi

ngs

Pick

up

sand

wic

h an

d ot

her l

unch

fixi

ngs

Hel

icop

ter s

afet

y br

iefin

gs (a

s ne

cess

ary)

at ~

7:40

AM

Hel

icop

ter s

afet

y br

iefin

gs (a

s ne

cess

ary)

at ~

7:40

AM

Con

ocoP

hilli

ps &

USG

S de

part

ear

ly fo

r Sto

p 1

Con

ocoP

hilli

ps &

USG

S de

part

ear

ly fo

r Sto

p 1

All

othe

r par

ticip

ants

dep

art a

t 8:0

0 A

MA

ll ot

her p

artic

ipan

ts d

epar

t at 8

:00

AM

Ret

urn

to c

amp

at ~

5:30

PM

R

etur

n to

cam

p at

~5:

30 P

M

(last

load

USG

S &

Con

ocoP

hilli

ps ~

7:0

0 PM

)(la

st lo

ad U

SGS

& C

onoc

oPhi

llips

~ 7

:00

PM)

Din

ner a

t 7:0

0 PM

Din

ner a

t 7:0

0 PM

Even

ing

Dis

cuss

ions

. . .

Even

ing

Dis

cuss

ions

. . .

Appendix A-1 177

Mid

nigh

t sun

on

over

turn

ed L

isbu

rne

Gro

up

Mid

nigh

t sun

on

over

turn

ed L

isbu

rne

Gro

up ––

view

from

Gal

brai

th L

ake

view

from

Gal

brai

th L

ake


C. G

il M

ull –

poin

ting

tow

ard

the

“Doo

nera

kFe

nste

r”in

the

cent

ral B

rook

s R

ange

OVERVIEW OF RECENT GEOLOGIC FIELD INVESTIGATIONS,...

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