The Laurel-Convict fault, eastern Sierra Nevada, California: A Permo–Triassic left-lateral fault, not a Cretaceous intrabatholithic break

Title:
The Laurel-Convict fault, eastern Sierra Nevada, California: A Permo–Triassic left-lateral fault, not a Cretaceous intrabatholithic break
Authors:
Greene, David C.; Stevens, Calvin H.; Wise, James M.
Citation:
Greene, D. C., Stevens, C. H., & Wise, J. M. (1997). The laurel-convict fault, eastern sierra nevada, california: A permo-triassic left-lateral fault, not a cretaceous intrabatholithic break. GSA Bulletin, 109(4), 483-488.
Publisher:
Geological Society of America Bulletin
DATE ISSUED:
Apr-1997
PERMANENT LINK:
http://hdl.handle.net/2374.DEN/4993; http://hdl.handle.net/2374
Type:
Article
Language:
en_US
Description:
The Laurel-Convict fault is a prominent, northwest-striking, high-angle fault exposed in Paleozoic rocks of the Mount Morrison pendant in the eastern Sierra Nevada of California. The fault zone averages 25–50 m in width and consists of narrow, anastomosing domains of ductile deformation separating lenses of Paleozoic metasedimentary rock. The fault, which cuts structures in middle Permian metasedimentary rocks, is intruded by a relatively undeformed quartz porphyry felsite dike that has yielded a U-Pb zircon upper intercept age of 225 ± 16 Ma. Displacement on the Laurel-Convict fault is therefore constrained to the interval between middle Permian and Late Triassic. Displacement criteria, including curvature and offset of bedding in the fault zone, rare mesoscopic ductile shear indicators, and restoration of offset lower Paleozoic stratigraphy and structure across splay faults, all indicate a moderate amount of apparent left-lateral strike-slip displacement. Our data do not support previous interpretations of the Laurel-Convict fault as a thrust-faulted terrane boundary or a major right-lateral shear zone. The Laurel-Convict fault is not, therefore, an exposed segment of Intrabatholithic Break 3 (IBB3), thus proposed Cretaceous right-lateral displacement of the Sr i = 0.706 isopleth on IBB3 must be accommodated either east of the Mount Morrison pendant in the Owens Valley or west of the pendant in the eastern Sierra Nevada.
ISSN:
00167606
Appears in Collections:
Faculty Publications

Full metadata record

DC FieldValue Language
dc.contributor.authorGreene, David C.en
dc.contributor.authorStevens, Calvin H.en
dc.contributor.authorWise, James M.en
dc.date.accessioned2013-01-02T15:40:13Zen
dc.date.accessioned2013-12-18T21:04:36Z-
dc.date.available2013-01-02T15:40:13Zen
dc.date.available2013-12-18T21:04:36Z-
dc.date.created1997-04en
dc.date.issued1997-04en
dc.identifier.citationGreene, D. C., Stevens, C. H., & Wise, J. M. (1997). The laurel-convict fault, eastern sierra nevada, california: A permo-triassic left-lateral fault, not a cretaceous intrabatholithic break. GSA Bulletin, 109(4), 483-488.en_US
dc.identifier.issn00167606en
dc.identifier.urihttp://hdl.handle.net/2374.DEN/4993en
dc.identifier.urihttp://hdl.handle.net/2374-
dc.descriptionThe Laurel-Convict fault is a prominent, northwest-striking, high-angle fault exposed in Paleozoic rocks of the Mount Morrison pendant in the eastern Sierra Nevada of California. The fault zone averages 25–50 m in width and consists of narrow, anastomosing domains of ductile deformation separating lenses of Paleozoic metasedimentary rock. The fault, which cuts structures in middle Permian metasedimentary rocks, is intruded by a relatively undeformed quartz porphyry felsite dike that has yielded a U-Pb zircon upper intercept age of 225 ± 16 Ma. Displacement on the Laurel-Convict fault is therefore constrained to the interval between middle Permian and Late Triassic. Displacement criteria, including curvature and offset of bedding in the fault zone, rare mesoscopic ductile shear indicators, and restoration of offset lower Paleozoic stratigraphy and structure across splay faults, all indicate a moderate amount of apparent left-lateral strike-slip displacement. Our data do not support previous interpretations of the Laurel-Convict fault as a thrust-faulted terrane boundary or a major right-lateral shear zone. The Laurel-Convict fault is not, therefore, an exposed segment of Intrabatholithic Break 3 (IBB3), thus proposed Cretaceous right-lateral displacement of the Sr i = 0.706 isopleth on IBB3 must be accommodated either east of the Mount Morrison pendant in the Owens Valley or west of the pendant in the eastern Sierra Nevada.en_US
dc.language.isoen_USen_US
dc.publisherGeological Society of America Bulletinen_US
dc.relation.ispartofFaculty Publicationsen_US
dc.titleThe Laurel-Convict fault, eastern Sierra Nevada, California: A Permo–Triassic left-lateral fault, not a Cretaceous intrabatholithic breaken_US
dc.typeArticleen_US
dc.contributor.institutionDenison Universityen_US
dc.date.digitized2013-01-02en
dc.contributor.repositoryDenison Resource Commonsen_US
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