The Mesozoic Orpheus rift basin, offshore Nova Scotia and Newfoundland, Canada: synrift and early postrift evolution of a well-imaged North Atlantic rift basin
The Orpheus rift basin of offshore eastern Canada formed during the Mesozoic breakup of the Pangean supercontinent before the opening of the North Atlantic Ocean. Using a dense grid of 2D seismic data, I have identified four distinct unconformity-bounded packages (A-D) associated with the basin’s ea...
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ftrutgersuniv:oai:example.org:rutgers-lib:32011 2023-05-15T17:22:53+02:00 The Mesozoic Orpheus rift basin, offshore Nova Scotia and Newfoundland, Canada: synrift and early postrift evolution of a well-imaged North Atlantic rift basin Zulfitriadi, Zulfitriadi Zulfitriadi, Zulfitriadi (author) Withjack, Martha O. (chair) Schlische, Roy W. (internal member) Monteverde, Donald H. (internal member) Rutgers University Graduate School - New Brunswick 2011 xii, 142 p. : ill. electronic resource application/pdf http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000058836 eng eng Rutgers University Electronic Theses and Dissertations Graduate School - New Brunswick Electronic Theses and Dissertations rucore19991600001 http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000058836 Geological Sciences Basins (Geology)--Canada Eastern Rifts (Geology)--Canada Geology Stratigraphic--Mesozoic Text theses 2011 ftrutgersuniv 2022-05-30T13:41:21Z The Orpheus rift basin of offshore eastern Canada formed during the Mesozoic breakup of the Pangean supercontinent before the opening of the North Atlantic Ocean. Using a dense grid of 2D seismic data, I have identified four distinct unconformity-bounded packages (A-D) associated with the basin’s early development. Information from nearby wells (albeit limited) and regional stratigraphy suggest that packages A, B, C, and D represent Paleozoic prerift strata and basement, Late Triassic (possibly Middle Triassic or Permian) to early Early Jurassic synrift strata, late Early to Middle Jurassic lower postrift strata, and Middle to Late Jurassic upper postrift strata, respectively. The synrift section contains salt and numerous igneous intrusions of the latest Triassic/earliest Jurassic Central Atlantic Magmatic Province (CAMP). Based on tectonostratigraphic analysis of the seismic data, I propose that the Orpheus and overlying Scotian basins experienced at least four stages of development during the Mesozoic. 1) Continental extension associated with rifting began by Late Triassic time (and possibly during Middle Triassic or Permian time) and continued into early Early Jurassic time, producing a series of E-striking, S-dipping basement-involved faults with normal separation (the Cobequid-Chedabucto border-fault system) that bound the Orpheus basin on the north. During early rifting, the basin was broad with few intrabasin faults. Most intrabasin, basement-involved faulting began during salt deposition, increasing the accommodation space and causing pronounced southward thickening of the salt. Movement on basement-involved faults during rifting produced broad fault-propagation folds in the synrift strata above the salt. 2) Shortening/inversion occurred shortly after rifting, causing widespread uplift and erosion and producing the breakup unconformity. Below the salt, the shortening reactivated many of the basement-involved extensional faults with at least a reverse component of displacement. Above the salt, the ... Thesis Newfoundland North Atlantic RUcore - Rutgers University Community Repository Canada |
institution |
Open Polar |
collection |
RUcore - Rutgers University Community Repository |
op_collection_id |
ftrutgersuniv |
language |
English |
topic |
Geological Sciences Basins (Geology)--Canada Eastern Rifts (Geology)--Canada Geology Stratigraphic--Mesozoic |
spellingShingle |
Geological Sciences Basins (Geology)--Canada Eastern Rifts (Geology)--Canada Geology Stratigraphic--Mesozoic Zulfitriadi, Zulfitriadi The Mesozoic Orpheus rift basin, offshore Nova Scotia and Newfoundland, Canada: synrift and early postrift evolution of a well-imaged North Atlantic rift basin |
topic_facet |
Geological Sciences Basins (Geology)--Canada Eastern Rifts (Geology)--Canada Geology Stratigraphic--Mesozoic |
description |
The Orpheus rift basin of offshore eastern Canada formed during the Mesozoic breakup of the Pangean supercontinent before the opening of the North Atlantic Ocean. Using a dense grid of 2D seismic data, I have identified four distinct unconformity-bounded packages (A-D) associated with the basin’s early development. Information from nearby wells (albeit limited) and regional stratigraphy suggest that packages A, B, C, and D represent Paleozoic prerift strata and basement, Late Triassic (possibly Middle Triassic or Permian) to early Early Jurassic synrift strata, late Early to Middle Jurassic lower postrift strata, and Middle to Late Jurassic upper postrift strata, respectively. The synrift section contains salt and numerous igneous intrusions of the latest Triassic/earliest Jurassic Central Atlantic Magmatic Province (CAMP). Based on tectonostratigraphic analysis of the seismic data, I propose that the Orpheus and overlying Scotian basins experienced at least four stages of development during the Mesozoic. 1) Continental extension associated with rifting began by Late Triassic time (and possibly during Middle Triassic or Permian time) and continued into early Early Jurassic time, producing a series of E-striking, S-dipping basement-involved faults with normal separation (the Cobequid-Chedabucto border-fault system) that bound the Orpheus basin on the north. During early rifting, the basin was broad with few intrabasin faults. Most intrabasin, basement-involved faulting began during salt deposition, increasing the accommodation space and causing pronounced southward thickening of the salt. Movement on basement-involved faults during rifting produced broad fault-propagation folds in the synrift strata above the salt. 2) Shortening/inversion occurred shortly after rifting, causing widespread uplift and erosion and producing the breakup unconformity. Below the salt, the shortening reactivated many of the basement-involved extensional faults with at least a reverse component of displacement. Above the salt, the ... |
author2 |
Zulfitriadi, Zulfitriadi (author) Withjack, Martha O. (chair) Schlische, Roy W. (internal member) Monteverde, Donald H. (internal member) Rutgers University Graduate School - New Brunswick |
format |
Thesis |
author |
Zulfitriadi, Zulfitriadi |
author_facet |
Zulfitriadi, Zulfitriadi |
author_sort |
Zulfitriadi, Zulfitriadi |
title |
The Mesozoic Orpheus rift basin, offshore Nova Scotia and Newfoundland, Canada: synrift and early postrift evolution of a well-imaged North Atlantic rift basin |
title_short |
The Mesozoic Orpheus rift basin, offshore Nova Scotia and Newfoundland, Canada: synrift and early postrift evolution of a well-imaged North Atlantic rift basin |
title_full |
The Mesozoic Orpheus rift basin, offshore Nova Scotia and Newfoundland, Canada: synrift and early postrift evolution of a well-imaged North Atlantic rift basin |
title_fullStr |
The Mesozoic Orpheus rift basin, offshore Nova Scotia and Newfoundland, Canada: synrift and early postrift evolution of a well-imaged North Atlantic rift basin |
title_full_unstemmed |
The Mesozoic Orpheus rift basin, offshore Nova Scotia and Newfoundland, Canada: synrift and early postrift evolution of a well-imaged North Atlantic rift basin |
title_sort |
mesozoic orpheus rift basin, offshore nova scotia and newfoundland, canada: synrift and early postrift evolution of a well-imaged north atlantic rift basin |
publishDate |
2011 |
url |
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000058836 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Newfoundland North Atlantic |
genre_facet |
Newfoundland North Atlantic |
op_relation |
Rutgers University Electronic Theses and Dissertations Graduate School - New Brunswick Electronic Theses and Dissertations rucore19991600001 http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000058836 |
_version_ |
1766109793674592256 |