the stratigraphy and structural history of the mesozoic and cenozoic ...

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$A marine wide angle reflection/refraction profile adjacent Nova ...$

5.3 Halotectonic Structural Associations 136 5.3.1 The Trough and Swell Association 136 5.3.2 The Intra-Salt Detachment Association 137 5.3.3 The Diapiric Association 142 5.3.4 The Secondary Weld Association 155 5.3.5 The Allochthonous Salt Association 158 5.4 Kinematic Analysis of Salt Structures 170 5.4.1 Introduction 170 5.4.2 Salt Movement and Sedimentation 173 Chapter 6: Evolution of the Scotian Slope Basin: Discussion 6.1 Evolution of the Scotian Slope Basin 184 6.1.1 Pre-Mesozoic 184 6.1.2 Late Triassic to Early Jurassic 190 6.1.3 Middle to Late Jurassic 193 6.1.4 Cretaceous 196 6.1.5 Tertiary 198 6.1.6 Quaternary 200 6.2 Implications for a Scotian Slope Petroleum System 202 Chapter 7: Conclusions and Recommendations for Future Work 7.1 Justifications for the Study 214 7.2 Key Conclusions 215 7.3 Recommendations for Future Work 220 References 221 viii
List of Figures (Short Titles) 1-1 Bathymetry, political boundaries, petroleum exploration licenses and study area of the Nova Scotia continental margin 2 1-2 Comparative stratigraphic chart of Scotian Basin and Atlantic margin analogs 9 1-3 Basemap of TGS-NOPEC seismic data used in study 11 1-4 Example TGS-NOPEC seismic line 13 1-5 Basemap of Lithoprobe seismic data used in study 14 1-6 Basemap of exploration wells located on the Scotian Slope and those within study area 16 2-1 Regional Tectonic Elements of Atlantic Canada 19 2-2 Schematic cross-section A-A’ through Scotian Basin 22 2-3 Lithostratigraphy of the Scotian Shelf 23 2-4 Cross-section B-B’ of Glooscap C-63, Moheida P-15, Mohican I-100 and Acadia K-62 wells 26 2-5 Generalized facies distribution of the Abenaki and equivalent formations 28 2-6 Multibeam bathymetric image of central Scotian Slope 32 2-7 Basement structure of the Scotian Basin 34 2-8 Tectonic reconstruction of Orpheus and Scotian basins 36 2-9 Regional geologic cross-section C-C’ across the Scotian Shelf and Slope 38 2-10 Scotian Margin basemap showing bathymetry, lease block boundaries, study area and salt body distribution 41 3-1 Seismic profile showing key seismic surfaces (1-10) and other significant surfaces 43 3-2 Synthetic seismogram of the Oneida O-25 well 45 ix
Page 1 and 2: THE STRATIGRAPHY AND STRUCTURAL HIS
Page 3 and 4: The integration of seismic stratigr
Page 5 and 6: leaving his door open and helping m
Page 7: 3.3.4 Tr2 Sequence Boundary 57 3.3.
Page 11 and 12: 3-22 Time structure map of the T1 S
Page 13 and 14: 5-17 End member geometries of alloc
Page 15 and 16: Chapter 1 Introduction 1.1 Introduc
Page 17 and 18: developed in the western part of th
Page 19 and 20: Areomagnetic surveys of the North A
Page 21 and 22: y Mukhopadhyay and Wade (1990), Wil
Page 23 and 24: 9 Figure 1-2: Comparative stratigra
Page 25 and 26: Naskapi N-30 Figure 1-3: Map showin
Page 27 and 28: SE NW 0 6 12 Kilometers 13 Figure 1
Page 29 and 30: converted using velocity informatio
Page 31 and 32: to date the effects of salt tectoni
Page 33 and 34: A 19 A’ Figure 2-1: Bathymetry an
Page 35 and 36: Within the area of the Scotian Basi
Page 37 and 38: 23 Figure 2-3: Generalized lithostr
Page 39 and 40: the landward extensions of regularl
Page 41 and 42: marine shales of the Misaine Member
Page 43 and 44: and positive relief structures on t
Page 45 and 46: formation thickness consistently in
Page 47 and 48: 2.4 Structural Styles and Geometry
Page 49 and 50: and igneous rocks of the Meguma Ter
Page 51 and 52: approximately 6 to 7 kilometers bel
Page 53 and 54: 4.2.3 Halotectonics In addition to
Page 55 and 56: 41 Figure 2-10: Scotian Margin base
Page 57 and 58: NW SE 6126 m 43 Figure 3-1: Represe
Page 59 and 60:
TGS Base Tertiary Unconformity 45 T
Page 61 and 62:
47 Figure 3-3: Lithoprobe seismic r
Page 63 and 64:
(Member Good DS9 Good Good Excellen
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NW SE Onlap Downlap 0 6 12 Kilomete
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3.3.1. Top Basement Marker Within t
Page 69 and 70:
3.3.2. Tr1 Sequence Boundary The Tr
Page 71 and 72:
3.3.3 Depositional Sequence 1 Depos
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Glooscap C-63 E Moheida P-15 D TWT
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NW SE D D’ Eurydice Figure 3-9: S
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Formation consists of a series of m
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These reflections may represent int
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Anomalous highs Sequence boundary i
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in shape, 1 to 12 kilometers in dia
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Intersection with salt structure Fa
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62, also intersected the Abenaki Fo
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marker in a landward direction (Fig
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south (slope-parallel) direction. T
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3.3.13 Depositional Sequence 5 Depo
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Thickness TWT (ms) D D’ Thick Int
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NW SE Quaternary Miocene - Oligocen
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Due to the consistently high amplit
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Correlation with the Shubenacadie H
Page 103 and 104:
Page 105 and 106:
3.3.18. T2 Sequence Boundary The T2
Page 107 and 108:
Reflections within DS8 are commonly
Page 109 and 110:
3.3.20 T3 Sequence Boundary The T3
Page 111 and 112:
Page 113 and 114:
3.3.22 Water Bottom The uppermost r
Page 115 and 116:
4.1 Introductory Remarks Chapter 4
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A (TWT ms) Basin-Bounding Fault Fam
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A A’ NW SE 105
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4.2.1 Slope Basin-Bounding Fault Fa
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Figure 4-3: Seismic Profile B-B’
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Wernicke (1981) or “second-order
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a) 2.0 3.0 4.0 5.0 6.0 7.0 8.0 b) D
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T3 T2 T1 T0 K1 J2 J1 Tr2 Tr1 NW SE
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thickening, resulting in distinct w
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Tertiary. In the northwest some maj
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SE NW Minor Faults 3076 m Major Fau
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NE SW 3075 m Pock-Marks ? Erosion E
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Chapter 5 Salt Tectonics 5.1 Mechan
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as a pressurized fluid with differe
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shales related to rapid progradatio
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131 Figure 5-3: Tectono-stratigraph
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Shelf N 0 15 30 Kilometers Moheida
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Shelf N 0 15 30 Kilometers Upper Sl
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A) NW SE B) Swells Normal basement-
Page 153 and 154:
Salt Detachment Association includi
Page 155 and 156:
formed shortly after autochthonous
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and Vendeville (1994) shows that th
Page 159 and 160:
Allochthonous Stock “Finger” Di
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A’ SE A Folding of strata from T0
Page 163 and 164:
Diapirs commonly intersect the K1 S
Page 165 and 166:
D’ SE NW D 0 3 6 Strata folded fr
Page 167 and 168:
Figure 5-14: Diapir rejuvenation du
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5.3.4 The Secondary Weld Associatio
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NW SE 0 3 6 Kilometers Inclined Sec
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An allochthonous salt structure is
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Salt Stocks A salt stock is charact
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F’ NE SW F 0 6 12 Kilometers Coal
Page 179 and 180:
G (A) (B) G’ Figure 5-20: (A) Nor
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Figure 5-21: Schematic evolution of
Page 183 and 184:
listric fault, causing the developm
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egardless of depositional setting a
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growth will continue until the sour
Page 189 and 190:
Salt structures with onlapping syn-
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the base of post-kinematic stratigr
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SE NW 4093 m 179 Offset of paleo-de
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NE SW 6 km 181 Turtle Structure Pos
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NE SW 183 0 3 6 Turtle Structure Ki
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Figure 6-1: Seismic profile from th
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Figure 6-2: Tectono-stratigraphic c
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Ordovician metasedimentary rocks of
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191 Figure 6-3: Schematic block dia
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etween the location of salt swells
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On the slope, the Late to Middle Ju
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Listric growth faults typically tip
Page 213 and 214:
this diapiric region. However, it w
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characteristically concordant with
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typical of passive margins modified
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Slope Basin: Kidston et al. (2002)
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~ Present day 100 C ~ Present day 1
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area can be divided into three slop
Page 225 and 226:
Pre-Mesozoic structures are not con
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eservoir. The well locations were c
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7.2 Key Conclusions Geological Evol
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exclusively deform Late Triassic to
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• A reservoir of Cretaceous to Te
Page 235 and 236:
References Alsop, G. I., Brown, J.P
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Gauley, B. J., 2001, Lithostratigra
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Keen, C. E., and Potter, D. P., 199
Page 241 and 242:
Scotian Rise, Geological Survey of
Page 243:
Welsink, H.J., Dwyer, J.D., and Kni
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