Spectral Analysis of the Forel-Ule Ocean Colour Comparator Scale
New paper on the Triassic Snadd Formation Regional ... · ing at times given the hectic sched-ule,...
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News from the research project Reconstructing the Triassic northern Barents shelf: basin infill patterns controlled by gentle sags and faults No 3 March 2015 Main Trias events in 2015: • June 1 st –3 rd : Partner meeting in Oslo: Datasharing summit. • Field work at Svalbard tentatively August 18 th – 31 st . !! New paper on the Triassic Snadd Formation Regional development and sequence stratigraphy Trias postdoc Tore Grane Klausen and co-work- ers have just published an article on this topic in Marine and Petroleum Geology. We quote the article’s abstract: T he Middle to Late Triassic Snadd Forma- tion represents one of the later stages of Early Mesozoic infilling of the Barents Sea Basin, expressed by a silicilastic wedge prograding from the southeast, where sediments were shed from the Uralide Orogeny. The formation was deposited in a shallow (100–500 m) basin facing the Boreal part of the Panthalassa Ocean, and the progradation reached its peak at the Svalbard Archipelago which has since been uplifted and where outcrops are exposed as the timeequiva- lent Botneheia and De Geerdalen formations. The Snadd Formation includes depositional environ- ments ranging from offshore shale through shallow marine to fluvial, arranged in discrete stratigraphic sequences. Here we present a refined sequence stratigraph- ic framework for the Snadd Formation. Two sec- ond order sequences have been interpreted within the limits of the study area, divided into six third order sequences. The two second order sequences are split along an Intra Carnian maximum flooding surface. Depositional elements inherent to the se- quence stratigraphic framework are also interpret- ed and extrapolated so as to describe the regional distribution of potential reservoir sandstones and the control exerted on the development of third order sequences. Different depositional environments from various datasets and scales of observation show the progressive development of a prograding delta across more than 700 km from a proximal position on the Finnmark Platform to a distal position on Edgeøya. Regional correlation of well logs and 2D seismic coupled with detailed depositional envi- ronment interpretation from 3D seismic and core has resulted in basin-wide palaeogeographic recon- struction of the formation throughout the Norwe- gian part of the Barents Sea, with implications for understanding the distribution and evolution of depositional systems during this large-scale basin infill. http://dx.doi.org/10.1016/j.marpetgeo.2015.02.004
Transcript of New paper on the Triassic Snadd Formation Regional ... · ing at times given the hectic sched-ule,...
News from the research project Reconstructing the Triassic northern Barents shelf: basin infill patterns controlled by gentle sags and faults
No 3March2015
Main Trias events in 2015: • June1st–3rd:PartnermeetinginOslo:Datasharing summit.• FieldworkatSvalbardtentativelyAugust18th–31st.!!
New paper on the Triassic Snadd Formation Regional development and sequence stratigraphyTriaspostdocTore Grane Klausenandco-work-ershavejustpublishedanarticleonthistopicinMarineandPetroleumGeology.Wequotethearticle’sabstract:
TheMiddletoLateTriassicSnaddForma-tionrepresentsoneofthelaterstagesofEarlyMesozoicinfillingoftheBarentsSea
Basin,expressedbyasilicilasticwedgeprogradingfromthesoutheast,wheresedimentswereshedfromtheUralideOrogeny.Theformationwasdepositedinashallow(100–500m)basinfacingtheBorealpartofthePanthalassaOcean,andtheprogradationreacheditspeakattheSvalbardArchipelagowhichhassincebeenupliftedandwhereoutcropsareexposedasthetimeequiva-lentBotneheiaandDeGeerdalenformations.TheSnaddFormationincludesdepositionalenviron-mentsrangingfromoffshoreshalethroughshallowmarinetofluvial,arrangedindiscretestratigraphicsequences. Herewepresentarefinedsequencestratigraph-icframeworkfortheSnaddFormation.Twosec-ondordersequenceshavebeeninterpretedwithin
thelimitsofthestudyarea,dividedintosixthirdordersequences.ThetwosecondordersequencesaresplitalonganIntraCarnianmaximumfloodingsurface.Depositionalelementsinherenttothese-quencestratigraphicframeworkarealsointerpret-edandextrapolatedsoastodescribetheregionaldistributionofpotentialreservoirsandstonesandthecontrolexertedonthedevelopmentofthirdordersequences. Differentdepositionalenvironmentsfromvariousdatasetsandscalesofobservationshowtheprogressivedevelopmentofaprogradingdeltaacrossmorethan700kmfromaproximalpositionontheFinnmarkPlatformtoadistalpositiononEdgeøya.Regionalcorrelationofwelllogsand2Dseismiccoupledwithdetaileddepositionalenvi-ronmentinterpretationfrom3Dseismicandcorehasresultedinbasin-widepalaeogeographicrecon-structionoftheformationthroughouttheNorwe-gianpartoftheBarentsSea,withimplicationsforunderstandingthedistributionandevolutionofdepositionalsystemsduringthislarge-scalebasininfill.http://dx.doi.org/10.1016/j.marpetgeo.2015.02.004
2D seismic mappingTheplanistofocusonconstrainingtheregionalge-ologybyfocusingontwoareas,oneofwhichwillbetheStappenHigh,whichisakeyinunderstandingthedevelopmentofthenorthernpartoftheshelf.
Provenance of reservoir sandstonesWewillcontinuetheprovenancestudiesofsilici-clasticfaciesbelongingtotheTriassicsedimentarysuccessionofSvalbard,onthebasisoftheresultsofpetrographic(opticalmicroscopy,SEMandCLtech-niques)andgeochemicalanalyses.ThesubjectoftheresearchwillbemostlysandstonesrepresentingtheKarentoppenandSomovbreenMembersoftheBra-vaisbergetFormation.
Fluvial seismic geomorphology Targetsaretoformalize,presentandpublishworkondecompactionofsedimentarysystems,withanemphasisonclinoforms.AtthenextstagetheseresultswillbeusedonclinoformdatasetsfromtheSWBarentsSea,toseeifnewlearningcanbegained.Ofspecialinterestisthequantificationofclinoformgeometriesassuchparametersmayinformourunder-standingoftheassociatedsedimentarysystem.
Sedimentary facies belts and regional variability WewillsamplecoresfromSnaddandKobbefor-mationatNPD’scorestore,andperformdetailedsedimentologicalstudy(logging)fromDeGeerdalenFormationandWilhelmøyaSubgroupatSvalbard.Furthermore,wewilllookforpossibleanalyticalmethodstoconstructthermalburialhistorytounder-standtheeffectofupliftondiageneticalterationandreservoirquality.
Did Triassic faulting halt regional clinoform pro-gradation? Workisfocusingonlinkingobservationsoftheoff-shoreseismicdatatoonshorelogsonEdgeøyabasedonourcurrentunderstandingofclinoformsanddeltasinshallowerwater.Additionally,wewillbefocusingontheTriassiclarge-scaledevelopmentofEdgeøya.3D photometric models Wewillcontinuewiththephotogrammetricprocess-ing,andweneedtocompletesomedevelopmentworktoensuretransitionbetweenthephotogrammetricsoftwareoutputandourregularlidarworkflows.Thetextured3Doutcropmodelswhenfinishedwillbe
handedoverforgeologicalwork.Atthisstagemarkerbedswillbetracedoutandstratigraphiclogsplacedintothemodelforfurtheranalysis,spanningacrosstothestudyoflow-angleclinoformsonstructuralhighs,clinothemearchitectureandrelatedsedimentaryfacies.
3D photometric models and strip-logs Datasetsfromtwofieldcampaigns(2012and2014)withextensivelogginginmanyhalf-grabensspanningacrosstofaciesinterpretationarecurrentlycompiledforpublication.
Faults analysed for deformation mechanism and sealing potential Ourworkoncharacterizingfaultsinpoorlyconsoli-datedsedimentsdividesintotwophases.Phase1willfocusontheanalysisandinterpretationsofthedatasetcollectedduringthe2014fieldcampaignPhase2willbededicatedtotheanalysisofthe2015dataandtoimplementthetotalstructural-stratigraphicdatabase.
Shale detachmentsExtensivedatahasbeencollectedthroughtwofieldseasons,andarecurrentlyprocessedtowardsasum-mary.Theseresultswillbecoordinatedwiththeotherfaultstudies.
Synthetic seismic modelling of the facies beltTheworkusesseismicmodellingsoftwareofNOR-SARproprietary,commercialandprototypes,espe-ciallyaPSDMsimulator(seeproposalfordetails).AtthemomentthefocusisontheKvalpyntenoutcropofEdgeøya.Abetterinputmodelcomingoutsoonwillformthebaseforamorecompletemodellingthatwillbeundertaken.
Structural style controlled by fault growth vs sedi-ment loadingInParma,wewillstartthepilotmodelandcompletethefirstseriesofpreliminaryexperiments.Themodelsetuphasbeendiscussedandmodifiedinlinewithpreliminaryresultsandfeedbackfromthepartners.Lateron,wewillcalibratethemodelandthediffer-entscenariosalongwiththeresultscomingfromthepreliminaryexperiments.
Decoupled fault-segment growth in mechanically layered successionsDatasetsarecurrentlybeingprocessed.
Excerpts from the Trias North Work Plan 2015
Things we hope to get done ...
Trias North in the Emerging Leaders program
The Future of the Final FrontierEmerging leadersisaprogramwhichisruninconjunctionwiththeArctic Frontiers conferenceinTromsø.ThisyearourownpostdocIngrid Anell hadthechancetoparticipateintheprogramasoneoftenPhD/PostdocsfromNorwegianinsti-tutionsfundedbytheNorwegianresearchcouncil.Thisisherreport.
Theprogrambroughttogether30youngpeoplefromavarietyofbackgrounds;geology,biology,oceanography,climate
science,economy,business,managementandpol-itics.ThegrouptravelledtogetherfromBodøviaSvolværandfinallytoTromsø,wheretheexcitingweek-longeventwasroundedoffwithtwodaysofpolicyatArcticFrontiers.Alongthewayanemi-nentgroupofmentorsjoined,includingembassyrepresentatives,prominentscientistsandleadersinindustryandbusiness.Theweektogetherwasintenseandexciting.Thetalksincludedsessionsfocusedonpoliticsandsecurityinthehigharctic,climateandenergy,safetyandmaritimeresourcesandbusinessandsocietyinnorthernNorway.Buttherewasalsoroomrforsomefantasticlunchesanddinners,aswellasculturalandsocialengage-mentslikeahigh-speedboatsafariaroundtheLofotenislands,andvisitinganaquariumandaVikingmuseum. Theconvergenceofsuchaninterdisciplinarygroupplacedeverydiscussioninawidercontext.Everyquestionwasviewedfromasocialperspective,aneconomicperspective,anenvironmentalper-spective,apoliticalperspective.Thediscussionsandworkhighlightedtheinter-disciplinarynatureofthegroupandparticularlythedifferentconsid-erationsbetweenscienceandsocie-ty.Amongseveralothertopics,the
groupdiscussedvisionsforthefutureenergymixintheArctic,whichnaturallyincludedtheroleofoilandgas.ThisdiscussiondidnotremainaboardHurtigruten,however,asitalsoheldacentralroleinthediscussionsthroughoutthepolicysessionatArcticFrontiers.AttheopeningsessiontherewasanarmchairdiscussionaboutoilandgasintheArctic,betweenapanelofpeoplewhichfeaturedbothGreenpeaceandroyalty.Asageologistyoudevelopauniquesenseoftimeandauniqueviewoftheearth.Itsevolutionanddevelopmentoccuronascalewhichisfarbeyondthehumantime-frame.Tectonicplates,outpouringsoflavaandvolcanicgas,supercon-tinents,andsnowballearth–allthiscanmakeanthropogenicinfluenceseemalmostpetty.Theearth,therocks,ourstudyarea,willmostcertainlysurviveclimatechange.Speciesmaynot,butlifewill.Asanacademic,evenwhenworkingwithseismicdata,wellsandsedimentaryrock,itiseasytotakeaneutralstandonoilandgasexploration.Theacademicroleissimplytopiecetogetherthegeologicalhistory. Itwasthereforethought-provokingtobeapartofthediscussionandtohearothersdiscusstheseverypertinentquestions.Questions,itbecameclear,whicharewithoutsimpleanswers.Visionscanbeeasycomparedtotherealityofthemultiplefactorswhichneedtobetakenintoaccountwhenmakingdecisions.
The emerging leaders and their mentors at The Edge Hotel in Tromsø, all glammed up for the banquet.
DuringthepolicysessionatArcticFrontiersprominentpeoplefrompolitics,business,envi-ronmentalorganizations,arcticgovernanceandscientificadvi-sorsdiscussedissuesrelatedtoclimateandenergyintheArctic.IfoundmyselfsittingbetweentwoambassadorslisteningtothePrinceofMonaco.ThismadeArcticFrontiersalittlemoreintimidatingthanmostconferencesIhadattendedbefore. Policygavewaytosciencesessions,however,andonThursdayIheldatalkentitledBridging the
gaps of our understanding of the Triassic develop-ment of the northern Barents Shelf.WhileArctic
Frontierswasveryenthusiastic,theorganizerswarnedmeofanaudienceofnon-geologistsandaneedtokeepthingssimple.Thepresentationthereforebe-camequiteageneraltalkabouthowunderstandingtheTrias-sicprovidesunderstandingof
source,reservoirandpotentiallysealonthenorth-ernBarentsshelf.Thetalkwaswellmetanditwasagoodchallengetopresenttoanaudiencewithadiversebackground.
EmergingLeaders/ArcticFrontierswasafantasticopportu-nity.Althoughalmostoverwhelm-ingattimesgiventhehecticsched-ule,sheeramountofinformationandintensityofconversation,itwastrulyafulfillingexperience.Thegroupwasdiverseandstimu-latingandthementorscamewithawidevarietyofinsightandguid-ance.IfeelIhadthechancetoseethingsdifferentlyandmeetsometrulyinterestingpeople,manyofwhomarenownotonlycontacts,butfriends.
“What happens in the Arctic does not stay in the Arctic”
Robert Papp, US Spe-cial representative to the Arctic, speaking at Arctic Frontiers 2015
Postdoc Ingrid Anell in Svolvær
• Osmundsen,Braathen,Rød,Hynne:Stylesofnormalfaultingandfaultcontrolledsedimenta-tionintheTriassicdepositsofEasternSvalbard.Norwegian Petroleum Directorate Bulletin.
• Anell,Braathen,Olaussen:TheTriassic–EarlyJurassicofthenorthernBarentsShelf:aregionalunderstandingoftheLongyearbyenCO2reser-voir.Norsk Geologisk Tidsskrift.
• Anell,Midtkandal,Braathen:TrajectoryanalysisandinferencesongeometricrelationshipsofanEarlyTriassicprogradingclinoformsuccession
onthenorthernBarentsShelf.Marine and Petro-leum Geology.
• Gabrielsen,Braathen,Skar:NormalFaultsinSedimentaryRocks;Dynamics,ArchitectureandInfluencesonFluidFlow.ConferenceonGeome-tryandGrowthofNormalFaults.
• Ogata,Anell,Braathen,Osmundsen,Smy-rak-Sikora,Husteli,Olaussen,Maher:Syndepo-sitionalfaultingintheLateTriassicsuccessionofKvalpynten,Edgeøya,EastSvalbard.CongressoftheItalianGeologicalSociety.
As registered in the Cristin Research Database
Trias merits of 2014
Trias website at UiO: mn.uio.no/triasnorth
Presenting our staffWe continue our presentation of people working at the Trias project. This time we take the trip to the far north to meet some folks at Svalbard.
MynameisGareth Lord andIamaPhDcandidateattheDepartmentofGeologyandMineralResourcesEngineeringattheNorwegianUniversityofScienceandTechnology(NTNU)inTrondheim.IamalsoanexternalPhDattheUniversityCentreinSvalbard(UNIS).MyprojectworkisfundedbytheNorwegianPetroleumDirectorate(NPD)andwillbeconductedincloseco-operationwiththeTriassicNorthProject,SINTEFandtheUniversityofBergen. IgraduatedtheUniversityofPlymouthinEnglandin2010,withaBachelorHonoursDegreeinGeology,includingathesiswhichinvolvedmappingtheareaofHarstadinnorthernNorway.MycarreerinSvalbardbeganthesameyearasafieldassistantwithSINTEF,NPDandlaterforUiT,anopportunitywhichsubsequentlydevelopedintoathesis.Iearnedmymas-tersinPetroleumGeologyatNTNUinTrondheim,inassociationwithUNIS.
ThetopiccoveredaregionaldevelopmentoffracturepatternsthroughoutcentralSpitsbergen,EdgeøyaandHopen. MyPhDprojectistoincreasetheunderstandingoftheentireTriassicsuccessionofSvalbardandtheNorthernBar-entsSea.Implimentinganextensivefielddataset,withrecentoffshoredatafromeasternSvalbardandtheKongKarlsLandregion.Theobjectivebeingtodiscernthemorediscretesedimentologicalandstratigraphicaldevelopmentswithinthesuccession.
MynameisBerit Husteli andIamaPhDcandidateinsedimentol-ogyattheUniversityCentreinSvalbard.Myresearchisrevolvingthesedimentologyofheterogeneouscoastaldepositsaffectedbytides.IhaveaBScinConstructionEngineeringfromOsloUniver-sityCollege,afewyearsexperienceasanengineerandanMScinEnvironmentandNaturalResourcesfromtheNorwegianUniver-sityofLifeSciences,specializinginGeology.StudentsummerswerespentdoinggeologicalmappingfortheNorwegianGeologicalSurvey. MyPhDresearchdealswiththeLongyearbyenCO2Lab’stargetedreservoir,thelateTriassicDeGeerdalenformation,anditssedimentology,depositionalarchitectureandlateralfaciesdistribution.Theaimofthestudyistodescribetidallyinfluencedsedimentsandtheirinherentheterogeneitiesinsuchdetailthattheircharacteristicscanbeparameterizedandimplementedintoareservoirmodel,successfullypredictingfluidbehaviour.Thedatawillprovideasspecificinputtoon-goingeffortstomodelreservoirpropertiesoftheKappToscanaGroup.Additionalfociareimprovedunderstandingofstackingpatternsintidalsystemsandtheenviron-mentsprevailingwhenthestudiedsedimentsweredeposited.
GARETH
BERIT
The Trias North project ishostedbyUniversityofOsloandfundedbytheResearchCouncilofNor-way,TullowOil,Statoil,LundinNorway,EdisonOilandRWEDea.ResearchpartnersareUniversityofBergen,UniversityCentreinSvalbard,NorwegianUniversityofScienceandTechnology,NORSAR,UniResearch,UniversityofUtrecht,UniversityofParma,PolishAcademyofSciences,andUniversityofNebraskaatOmaha,andwearecooperatingwithGeologicalSurveyofNorway,GeologicalSurveyofCanadaandothers. PleasespreadthisnewsletterwithinyourinstitutionandtootherTriasfans.
MARKMynameisMark Mulrooney,TriasNorthPhDcandidateattheUniversityCentreinSvalbard(Unis),wheremyresearchisfocusedonTriassicbasindevelopmentandevolutionintheBarentsShelf.PriortocommencingmyPhDresearchIobtainedaBScinGeologyfromUniversityCollegeDublin,andanMSCinPetroleumGeosciencefromRoyalHolloway,UniversityofLondon. MyresearchfocussesonfaultactivityduringtheTriassicutilising3Dseismicsurveys.InadditionIamconductingoutcropandcorebasedstudiesoftensileTertiarystructuresaffectingLateTriassictoEarlyJurassicsedimentsintheLong-yearbyenenvirons.IwasresponsibleforacquiringTriassicoutcropphotogrammetryduringlastsummer’sfieldworkinEasternSvalbardwhichiscurrentlybeingrenderedintoahighresolution3Dmodel.Themodelwillallowinterpreta-tionofregionalcharacteristicsofadeltaicsysteminteractingwithsyn-depositionalfaulting.InadditionwewilldeployUAVmountedhighdefinitioncamerasduringnextsummer’sfieldseasoninordertocaptureimageryfromotherwiseinaccessibleareas.
MynameisAleksandra Smyrak-Sikora.IamPhDstudentfromtheUniversityofBergenworkingintheUniversityCentreinSvalbard.MyPhDprojectfocusesonthearchitectureofsedimentsdepositedinareasofactivetectonics.AnexcellentexampleofinteractionoffaultingwithsedimentaryprocessescanbefoundinKvalpynten(SouthernEdgeøya),wherealongofninekilometreslongcliff,twelvesmallscalesedimentarybasins(grabensandhalfgrabens)areexposed.
IhavebeenattendingexpeditionstoEdgeøyatwice,in2012and2014,wheremymaintaskwastostudysedimenta-ryfillofKvalpyntengrabens.DespitesteepmountainslopesourTriassicNorthGroupmanagedtologmorethan1800mofsandstonesandshalesdepositedwithinfault-boundedbasinsandabovethem.CurrentlyIamworkingonfaciesinterpretationandsedimentaryarchitectureofbasinswemanagedtologtoandIamtryingtolinktheevolutionofsedi-mentsandfaultactivity. IcametoSvalbardforthefirsttimein2006todofieldworkformyMasterthesis,focusingonductiledeformationinHeclaHoekSuccession,exposedinSWSvalbard.In2008IdefendedMScdegreeattheUniversityofWroclaw,Poland.IworkatUNISsince2012.InadditiontoTriassicrocksonEdgeøya,IalsostudyCarboniferousriftfillinBillefjorden,CentralSpitsbergen.
ALEKS
