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Papoose Flat, Eureka Valley–Joshua Flat–Beer Creek, and Sage Hen Flat plutons: Examples of rising, sinking, and cookie-cutter plutons in the central White–Inyo Range,eastern California

By
Sven S. Morgan
Sven S. Morgan
Department of Geology, Central Michigan University, Mt. Pleasant, Michigan 48859 USA
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Richard D. Law
Richard D. Law
Department of Geological Sciences, Virginia Tech, Blacksburg, Virginia 24061 USA
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Michel de Saint Blanquat
Michel de Saint Blanquat
CNRS, Laboratoire de Pétrophysique et Tectonique, UniversitéPaul Sabatier, Toulouse, France
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Published:
January 01, 2000

Abstract

The central White-Inyo Range in eastern California has been an excellent field area to study concordant (deformed aureoles) and discordant, or “cookie cutter” plutons (see Nelson and Sylvester, 1971; Nelson et al., 1978; Sylvester et al, 1978a; Sylvester et al, 1978b; Paterson et al., 1991; Law et al., 1992, 1993; Bilodeau and Nelson, 1993; Morgan and Law, 1994; Morgan et al., 1998a and b, Saint Blanquat et al., in review), because: 1) the range is dominantly composed of a well-mapped sedimentary section where the dominant contractional regional deformation predates pluton emplacement, and 2) the plutons are well exposed at various structural levels. In this contribution, we present some of our work on three of the plutons in the range, the Eureka Valley-Joshua Flat-Beer Creek (EJB) composite pluton, the Sage Hen Flat pluton, and the Papoose Flat pluton. These three plutons exhibit drastic differences in the style and amount of deformation at their margins. Description and examination of the deformation (or lack of) at the margins of these plutons, which accommodated their emplacement, along with a characterization of the internal magmatic/solid state/magnetic foliations, are the foci of this paper and field trip.

Specifically, field trip participants will have the opportunity to observe the following; 1) Total lack of strain at a pluton contact (Sage Hen Flat pluton), 2) Intense strain at two pluton contacts related to emplacement (Papoose

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GSA Field Guide

Great Basin and Sierra Nevada

David R. Lageson
David R. Lageson
Department of Earth Sciences Montana State University Bozeman, MT 59717 USA
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Stephen G. Peters
Stephen G. Peters
Reno Field Office Mackay School of Mines, MS-176 University of Nevada Reno, Nevada 89557-0047 USA
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Mary M. Lahren
Mary M. Lahren
Department of Geological Sciences MS-l72 University of Nevada Reno, Nevada 89557 USA 2000
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Geological Society of America
Volume
2
ISBN electronic:
9780813756028
Publication date:
January 01, 2000

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