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

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

Figure 1-5: Central Scotian Slope basemap showing gross seafloor bathymetry, select exploration wells, Lithoprobe deep seismic lines 88-1 and 88-1a, and study area (red). 14
converted using velocity information from wells and migrated. This processing was not done as it was outside the objectives of the thesis. The use of time migrated seismic is, however, a standard within both academia and the petroleum industry and, as long as its limitations are acknowledged, is an acceptable means of interpretation. Guidelines for the interpretation of salt structures and surrounding strata were obtained from salt tectonic and structural models established in works by Jenyon (1986), Jackson and Cramez (1989), Venderville and Jackson (1992a, 1992b), Jackson and Venderville (1994) Letouzey et al. (1995), Ge et al. (1997) and others. Eight exploration wells are located within the thesis study area: three on the shelf and five on the slope (Figure 1-6). Two of the slope wells, Newburn H-23 and Weymouth A-45, were drilled within the past two years during the completion of this study. Thus, according to regulations, information pertaining to these two wells was held proprietary by the operating companies, Chevron et al. and EnCana et al. respectively, and was not available for public use. BP Canada provided digital density, sonic and checkshot data for five of the remaining wells: Moheida P-15, Glooscap C-63 and Oneida O-25 all located on the shelf, Evangeline H-98 located on the shelf break, and Acadia K-62 located on the slope (Figure 1-6). Digital density and sonic data were provided by BP Canada for the slope well Shubenacadie H-100. Synthetic seismic sections were created in order to tie seismic and well data. Lithostratigraphic and biostratigraphic data posted on the GSC Atlantic Basin Database (2004) was used to identify and date key seismic surfaces. These surfaces were then used 15
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 and 8: 3.3.4 Tr2 Sequence Boundary 57 3.3.
Page 9 and 10: List of Figures (Short Titles) 1-1
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: SE NW 0 6 12 Kilometers 13 Figure 1
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
Page 65 and 66: NW SE Onlap Downlap 0 6 12 Kilomete
Page 67 and 68: 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
Page 73 and 74: Glooscap C-63 E Moheida P-15 D TWT
Page 75 and 76: NW SE D D’ Eurydice Figure 3-9: S
Page 77 and 78: Formation consists of a series of m
Page 79 and 80:
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
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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-
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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
Page 161 and 162:
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
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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
Page 185 and 186:
egardless of depositional setting a
Page 187 and 188:
growth will continue until the sour
Page 189 and 190:
Salt structures with onlapping syn-
Page 191 and 192:
the base of post-kinematic stratigr
Page 193 and 194:
SE NW 4093 m 179 Offset of paleo-de
Page 195 and 196:
NE SW 6 km 181 Turtle Structure Pos
Page 197 and 198:
NE SW 183 0 3 6 Turtle Structure Ki
Page 199 and 200:
Figure 6-1: Seismic profile from th
Page 201 and 202:
Figure 6-2: Tectono-stratigraphic c
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Ordovician metasedimentary rocks of
Page 205 and 206:
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
Page 211 and 212:
Listric growth faults typically tip
Page 213 and 214:
this diapiric region. However, it w
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characteristically concordant with
Page 217 and 218:
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
Page 229 and 230:
7.2 Key Conclusions Geological Evol
Page 231 and 232:
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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