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Isotopic age constraints on middle Paleozoic deformation in the northern Sierra Nevada, California

Saleeby, Jason and Hannah, Judith L. and Varga, Robert J. (1987) Isotopic age constraints on middle Paleozoic deformation in the northern Sierra Nevada, California. Geology, 15 (8). pp. 757-760. ISSN 0091-7613. https://resolver.caltech.edu/CaltechAUTHORS:20140826-085339451

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Abstract

Allochthons of the lower Paleozoic Shoo Fly Complex in the northern Sierra Nevada were assembled and internally deformed prior to formation of a Devonian-Permian island-arc sequence. U/Pb data on zircons indicate ages of 423 +5/−15 Ma for a submarine tuff within the uppermost thrust slice of the Shoo Fly Complex and 378 +5/−10 Ma for a granitic intrusion that may be cogenetic with the lower part of the arc sequence. These data indicate late Early Silurian Shoo Fly deposition and proximity to active volcanism, as well as late Middle Devonian initiation of arc-related magmatism.


Item Type:Article
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URLURL TypeDescription
http://dx.doi.org/10.1130/0091-7613(1987)15<757:IACOMP>2.0.CO;2 DOIArticle
http://geology.gsapubs.org/content/15/8/757PublisherArticle
http://geology.geoscienceworld.org/content/15/8/757PublisherArticle
Additional Information:© 1987 Geological Society of America. Manuscript received September 8, 1986; Revised manuscript received May 4, 1987; Manuscript accepted May 15, 1987. Support for geochronological and geological studies in the northern Sierra Nevada was provided by National Science Foundation Grants EAR-8018811, EAR-8218460 (to Saleeby), and EAR-7614270 (to Eldridge Moores, supporting Hannah and Varga). We thank Eldridge Moores for initiating these studies, Cherilyn Saleeby for patience and expertise in hand sorting of zircon, and David Harwood and Richard Schweickert for constructive reviews of the manuscript.
Funders:
Funding AgencyGrant Number
NSFEAR-8018811
NSFEAR-8218460
NSFEAR-7614270
Issue or Number:8
Record Number:CaltechAUTHORS:20140826-085339451
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140826-085339451
Official Citation:Jason Saleeby, Judith L. Hannah, and Robert J. Varga Isotopic age constraints on middle Paleozoic deformation in the northern Sierra Nevada, California Geology, August, 1987, v. 15, p. 757-760, doi:10.1130/0091-7613(1987)15<757:IACOMP>2.0.CO;2
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48893
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:26 Aug 2014 17:01
Last Modified:03 Oct 2019 07:08

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