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The geologic evolution of the Okanagan Valley shear zone near Oliver, British Columbia, Canada Towell, Moses Jesus
Abstract
The Okanagan Valley shear zone (OVsz) is approximately 1.5 km thick and delineates the western margin of the Shuswap metamorphic complex (SMC). The western contact of the OVsz is defined by the Okanagan Valley detachment fault (OVdf), an approximately 20° west-dipping, extensional detachment that facilitated exhumation of the Shuswap metamorphic complex during the orogenic collapse of the southeastern Canadian Cordillera in the Eocene. The field area studied is located to the north of Oliver, B.C. and west of Vaseaux Lake. This study observes and constrains its geologic evolution through petrographic and structural analysis of the rocks within the footwall. Two main lithologies are observed within the OVsz, the Green Lake metasedimentary complex (GLmc), the host rock, and the Mt. Keogan intrusive complex. Intense ductile deformation is observed through a penetrative mylonitic fabric that overprints both lithologies. A top-to-the-westnorth- west sense of shear has been suggested through kinematic indicators.
Item Metadata
Title |
The geologic evolution of the Okanagan Valley shear zone near Oliver, British Columbia, Canada
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Creator | |
Date Issued |
2015-03
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Description |
The Okanagan Valley shear zone (OVsz) is approximately 1.5 km thick and
delineates the western margin of the Shuswap metamorphic complex (SMC). The western
contact of the OVsz is defined by the Okanagan Valley detachment fault (OVdf), an
approximately 20° west-dipping, extensional detachment that facilitated exhumation of the
Shuswap metamorphic complex during the orogenic collapse of the southeastern Canadian
Cordillera in the Eocene. The field area studied is located to the north of Oliver, B.C. and
west of Vaseaux Lake. This study observes and constrains its geologic evolution through
petrographic and structural analysis of the rocks within the footwall. Two main lithologies
are observed within the OVsz, the Green Lake metasedimentary complex (GLmc), the host
rock, and the Mt. Keogan intrusive complex. Intense ductile deformation is observed
through a penetrative mylonitic fabric that overprints both lithologies. A top-to-the-westnorth-
west sense of shear has been suggested through kinematic indicators.
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Genre | |
Type | |
Language |
eng
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Series | |
Date Available |
2015-10-22
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivs 2.5 Canada
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DOI |
10.14288/1.0053621
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URI | |
Affiliation | |
Campus | |
Peer Review Status |
Unreviewed
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Scholarly Level |
Undergraduate
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Rights URI | |
Aggregated Source Repository |
DSpace
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Rights
Attribution-NonCommercial-NoDerivs 2.5 Canada