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Influence of synrift salt on rift-basin development
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Text
TitleInfo
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Title
Influence of synrift salt on rift-basin development
SubTitle
application to the Orpheus basin, offshore eastern Canada
PartName
PartNumber
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ETD_2009
Identifier
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http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051811
Language
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eng
Genre
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theses
Subject
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(authority = RUETD)
Topic
Geological Sciences
Subject
(ID = SBJ-2);
(authority = ETD-LCSH)
Topic
Rifts (Geology)
Subject
(ID = SBJ-3);
(authority = ETD-LCSH)
Topic
Sedimentation and deposition
Subject
(ID = SBJ-4);
(authority = ETD-LCSH)
Topic
Basins (Geology)
Abstract
I present a new interpretation of the tectonic evolution of Orpheus basin, a narrow Mesozoic rift basin on the passive margin of offshore eastern Canada. This work
incorporates insights gained from a scaled experimental modeling study that simulates multiphase deformation on a basin with a synrift ductile unit, to show that the structural deformation observed within this basin cannot completely be attributed to salt-related
buoyancy-driven processes. Seismic data show that the Orpheus and overlying Scotian basins experienced at least four stages of development: Triassic-Early Jurassic rifting, shortening during the rift/drift transition in the mid-Early Jurassic, regional uplift and erosion during the earliest Cretaceous, and a fourth event that had, at least locally on the North Step, a compressional component during the Oligocene.
The presence of the synrift Argo salt profoundly affected the style of deformation during both the formation of the basin, and the subsequent tectonic events. The synrift
salt decoupled the cover deformation from basement deformation. Forced folds and salt ridges developed in the cover above the salt, whereas, faulting accommodated basement extension below the salt. During subsequent tectonic events, deformation was mainly accommodated above the basement faults by: 1) reactivating preexisting extensional structures such as passive salt diapirs and salt ridges, and 2) further amplifying preexisting forced folds that formed during the rifting phase. The presence of multiple unconformities, disharmonic sets of synclines and salt-cored anticlines (which developed from preexisting extensional forced folds), vertical salt welds, and detached thrusts indicate that this basin underwent multiple episodes of shortening, uplift, and erosion
after rifting ended in the Early Jurassic.
incorporates insights gained from a scaled experimental modeling study that simulates multiphase deformation on a basin with a synrift ductile unit, to show that the structural deformation observed within this basin cannot completely be attributed to salt-related
buoyancy-driven processes. Seismic data show that the Orpheus and overlying Scotian basins experienced at least four stages of development: Triassic-Early Jurassic rifting, shortening during the rift/drift transition in the mid-Early Jurassic, regional uplift and erosion during the earliest Cretaceous, and a fourth event that had, at least locally on the North Step, a compressional component during the Oligocene.
The presence of the synrift Argo salt profoundly affected the style of deformation during both the formation of the basin, and the subsequent tectonic events. The synrift
salt decoupled the cover deformation from basement deformation. Forced folds and salt ridges developed in the cover above the salt, whereas, faulting accommodated basement extension below the salt. During subsequent tectonic events, deformation was mainly accommodated above the basement faults by: 1) reactivating preexisting extensional structures such as passive salt diapirs and salt ridges, and 2) further amplifying preexisting forced folds that formed during the rifting phase. The presence of multiple unconformities, disharmonic sets of synclines and salt-cored anticlines (which developed from preexisting extensional forced folds), vertical salt welds, and detached thrusts indicate that this basin underwent multiple episodes of shortening, uplift, and erosion
after rifting ended in the Early Jurassic.
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electronic resource
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x, 139 p. : ill.
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Note
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M.S.
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Includes bibliographical references (p. 45-51)
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by Michael A. Durcanin
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Durcanin
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Michael A.
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1983-
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Michael A. Durcanin
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Roy
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chair
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Roy W Schlische
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Withjack
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Martha
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co-chair
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Martha Withjack
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Monteverde
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Donald
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Donald Monteverde
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Rutgers University
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degree grantor
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Graduate School - New Brunswick
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OriginInfo
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2009
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2009-10
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xx
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Rutgers University Electronic Theses and Dissertations
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ETD
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Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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Identifier
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doi:10.7282/T39P31T3
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ETD graduate
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The author owns the copyright to this work
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Copyright protected
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Open
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Permission or license
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Durcanin
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Michael
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Michael Durcanin
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Rutgers University. Graduate School - New Brunswick
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I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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