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Age and tectonic setting of Mesozoic metavolcanic and metasedimentary rocks, northern White Mountains, California

Hanson, R. Brooks and Saleeby, Jason and Fates, D. Gilbert (1987) Age and tectonic setting of Mesozoic metavolcanic and metasedimentary rocks, northern White Mountains, California. Geology, 15 (11). pp. 1074-1078. ISSN 0091-7613. https://resolver.caltech.edu/CaltechAUTHORS:20140826-093917285

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Abstract

Mesozoic metavolcanic and metasedimentary rocks in the northern White Mountains, eastern California and western Nevada, are separated from lower Paleozoic and Precambrian rocks by Jurassic and Cretaceous plutons. The large stratigraphic hiatus across the plutons is called the Barcroft structural break. Recent mapping and new U/Pb zircon ages of 154 +3/−1 Ma and 137 ±1 Ma. from an ash-flow tuff and a hypabyssal intrusion, respectively, indicate that part of the Mesozoic section and the Barcroft structural break are younger than the 160–165 Ma Barcroft Granodiorite, in contrast to previous interpretations. The Barcroft Granodiorite has been thrust westward over most of the Mesozoic section. It is everywhere in fault contact with overturned metasedimentary rocks on the west side of the range, rocks which were previously thought to be upright and the oldest part of the Mesozoic section. The McAfee Creek Granite, which has a 100 ±1 Ma U/Pb zircon age, postdates thrusting; therefore, the Barcroft structural break is primarily Early Cretaceous in age.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1130/0091-7613(1987)15<1074:AATSOM>2.0.CO;2DOIArticle
http://geology.gsapubs.org/content/15/11/1074PublisherArticle
http://geology.geoscienceworld.org/content/15/11/1074PublisherArticle
Additional Information:© 1987 Geological Society of America. Manuscript received April 1, 1987; Revised manuscript received August 7, 1987; Manuscript accepted August 28, 1987. Funding was provided by grants from White Mountain Research Station, University of California, to Hanson and Fates, Sigma Xi and National Science Foundation (NSF) Grant EAR 8312702 (to W. G. Ernst) for Hanson, and NSF Grant EAR 8419731 to Saleeby. We thank W. G. Ernst, C. A. Hall, S. S. Sorensen, and G. A. Dunne for comments on earlier versions of this manuscript and R. Kistler and J. Stewart for thoughtful reviews. Mahmood Chaudhry and Cherilyn Saleeby assisted in preparing the samples for U/Pb dating.
Funders:
Funding AgencyGrant Number
University of California White Mountain Research StationUNSPECIFIED
Sigma XiUNSPECIFIED
NSFEAR 8312702
NSFEAR 8419731
Issue or Number:11
Record Number:CaltechAUTHORS:20140826-093917285
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140826-093917285
Official Citation:R. Brooks Hanson, Jason B. Saleeby, and D. Gilbert Fates Age and tectonic setting of Mesozoic metavolcanic and metasedimentary rocks, northern White Mountains, California Geology, November, 1987, v. 15, p. 1074-1078, doi:10.1130/0091-7613(1987)15<1074:AATSOM>2.0.CO;2
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48896
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:26 Aug 2014 16:54
Last Modified:03 Oct 2019 07:08

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