4 NExT Struct Compression Notes 22110
-
Upload
iwan-kurniawan -
Category
Documents
-
view
218 -
download
0
Transcript of 4 NExT Struct Compression Notes 22110
![Page 1: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/1.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 1/42
An Introduction to
Structural Styles and Tectonicsin Petroleum Geology
COMPRESSION
Dr Kevin C. HillUniversity of Melbourne
![Page 2: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/2.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 2/42
Thrust Faultsusually at a low angle to bedding, they
repeat stratigraphic section.
![Page 3: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/3.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 3/42
![Page 4: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/4.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 4/42
Detachments,often parallel to bedding, they
separate different structural styles
D e t a c h m e n t
Contorted Beds
P a r a l l e l B e d s
![Page 5: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/5.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 5/42
Thrust repeat in duplex
![Page 6: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/6.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 6/42
Section repeated in Break-Thrust
Fold first, then thrust forelimb
![Page 7: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/7.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 7/42
Section repeated inBreak-Thrust
Fold first, thenthrust forelimb
Forelimb
![Page 8: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/8.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 8/42
Fault-bendFolding
3 types of fold-thrust interactions
ramp
ramp Fault-propagationFolding
DetachmentFolding
Detachment
Detachment
Detachment
![Page 9: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/9.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 9/42
Fault-bend fold or
ramp anticline
PalaeozoicLimestone Cretaceous clastics
Over 40 kmdisplacement
![Page 10: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/10.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 10/42
INCOMPETENT
Typical hanging wall shape
Step spacing dependson thickness changes
major step is locus of younger extensional faults
Major thrust faults don'toverlap significantly
Double the faulted section , net shortening always ~50%
Where thickened section encountersfootwall step motion is transferred
to new fault
Major faults are younger in direction of tectonic transport
FIXEDPOINT
Faults cut up-section indirection of tectonic transport
Faults tend to be parallel to beddingin incompetent rocks and oblique in
competent rocks
COMPETENT "BEAMS"
Idealized Thrust Fault Development
![Page 11: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/11.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 11/42
Position of hinges locate ramp
Gentle dip on top of anticlinegives regional tilt
Ramp height = elevation of horizon on top of
anticline minus regional elevationRegional elevation
Elevation of top must be known
Dip of limb = dip of rampE
E
D
DD
C
CC
B
BB
A AA
RAMPHEIGHT
![Page 12: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/12.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 12/42
Fault Propagation Fold
Tip
![Page 13: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/13.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 13/42
A fault propagation fold inCarboniferous slates, South Wales
TRef I
d
0 1 2 m
after Chapman & Williams (1984)
![Page 14: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/14.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 14/42
Loss of displacementby folding
Tip
Loss of displacementby imbrication
![Page 15: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/15.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 15/42
Detachment fold
![Page 16: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/16.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 16/42
Typical detachments in theAlberta Disturbed Belt
Concentric Fold Detachments
"Sole Fault" Detachment
"Front Fold" Detachment
![Page 17: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/17.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 17/42
Detachment fold then break-
thrust through forelimb
![Page 18: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/18.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 18/42
FLAT
RA M P COMPETENTROCK
INCOMPETENT
Ramp anticline
Ramp / flat geometry
![Page 19: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/19.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 19/42
Possible hangingwall / footwallrelationships
FWF
HWF - Hangingwall Flat
HWR - Hangingwall RampFWF - Footwall FlatFWR - Footwall Ramp
FWFFWF
FWR
FWRHWF
HWF
1.2.
3.4. 5.
![Page 20: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/20.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 20/42
Cape Liptrap – near Melbourne
![Page 21: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/21.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 21/42
![Page 22: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/22.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 22/42
Competent beds deform
independently
Internally deformedcompetent beds
D e t a
c h m e n
t
![Page 23: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/23.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 23/42
Competent beds deform
independentlyRamp anticline
![Page 24: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/24.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 24/42
Hook structure top
Ramp anticline
![Page 25: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/25.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 25/42
1.00
1.375
After Liu & Dixon 1995
Competent (strong) beds
deform independently
![Page 26: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/26.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 26/42
DD
R R
1
2
2
Thrust over young beds
Section thickenedby duplication
Thrust cuts up sectionin direction of transport
Thickness normalThickness normal
Normal stratigraphicsequence
Normal stratigraphicsequence
Normalstratigraphic
interval
Thickening
Flat R a m p
3
4
What happens to bed 1 to the right and to beds 3 & 4 to the left?
![Page 27: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/27.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 27/42
![Page 28: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/28.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 28/42
Wage
Shelf Kubor-Mendi Trough
Basin Toro
B a s i n T o r o Shelf Toro
Shelf Toro
Kutubu Mubi
NE
Regional Kutubu - Wage - Nembi SectionSW
A
NembiValleyWage
KutubuIagifu
Omati Trough HediniaIorogabaiu Mubi
0
0
5
5
10
10
km
km
Darai Limestone
Miocene (distal)
Eocene
Ieru Formation
(Miocene)
(Cretaceous)
Toro Sandstone
Jurassic
Basement
(Neocomian)
(Paleozoic)0 20 km
![Page 29: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/29.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 29/42
Gulf of Papua
BintuniBasin
SalawatiBasin
KutubuOilfield
HidesGasfield
SFS
Neogene Basin
Late Mio-PlioceneForeland Basin
ArafuraPlatform
T a s m a n L i n e
F ly
Platform
Tangguh Gas Province
New GuineaOil & Gas
CenderawasihBay
250 km Pandora-Pasca
![Page 30: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/30.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 30/42
Fold Belt
HighlandsHighway
![Page 31: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/31.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 31/42
After Dahlstrom 1970
Simple Transfer
Zone
![Page 32: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/32.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 32/42
After Dahlstrom 1970
Footwallboundary
Bedding surfacein upper part of
thrust sheet
Opposed plungesaligned above
buried tear
Tear fault
Bedding surfacein lower half of the thrust sheet
![Page 33: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/33.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 33/42
Mananda
Hides
Juha
![Page 34: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/34.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 34/42
Model for the offset of fold axesabove a footwall lateral ramp
Hides?
Juha?
![Page 35: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/35.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 35/42
FOOTWALL
RAMP ANTICLINE
FLAT
RAMP
![Page 36: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/36.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 36/42
Iagifu-Wage Regional Section
![Page 37: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/37.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 37/42
SAR
Mananda
Moran
Agogo
Paua
IagifuHedinia
![Page 38: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/38.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 38/42
Looking ESE
Previous Modelextent to the west
Iagifu Hedinai
![Page 39: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/39.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 39/42
![Page 40: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/40.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 40/42
![Page 41: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/41.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 41/42
![Page 42: 4 NExT Struct Compression Notes 22110](https://reader033.fdocuments.us/reader033/viewer/2022052516/577cd1081a28ab9e78937422/html5/thumbnails/42.jpg)
8/13/2019 4 NExT Struct Compression Notes 22110
http://slidepdf.com/reader/full/4-next-struct-compression-notes-22110 42/42