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GEOREF RECORD

The Papoose Flat Pluton of eastern California; a reassessment of its emplacement history in the light of new microstructural and crystallographic fabric observations

R. D. Law, S. S. Morgan, M. Casey, A. G. Sylvester and M. Nyman
The Papoose Flat Pluton of eastern California; a reassessment of its emplacement history in the light of new microstructural and crystallographic fabric observations (in The second Hutton symposium on the origin of granites and related rocks; proceedings, P. E. Brown (editor) and B. W. Chappell (editor))
Special Paper - Geological Society of America (1992) 272: 361-375

Abstract

The Papoose Flat pluton was forcibly emplaced with sideways expansion into a series of Cambrian shelf strata. Intense crystal plastic deformation of the mylonitic border facies to the pluton and surrounding country rocks is shown by <= 90% thinning of individual stratigraphic layers in the metamorphic aureole. Microstructural and crystallographic fabric analysis indicates that mylonite formation around the W margin of the pluton was dominantly associated with plane strain deformation. Crystal plastic deformation was restricted to the pluton's gneissic border facies and the overlying aureole rocks. The relatively high deformation T (> 450 degrees C) indicated by the c-axis fabrics in the mylonites means that the pluton acted as a heat source during thrusting-related mylonite formation synchronous with pluton emplacement, or at least commenced during the early stages of pluton cooling.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Volume: 272
Title: The Papoose Flat Pluton of eastern California; a reassessment of its emplacement history in the light of new microstructural and crystallographic fabric observations
Title: The second Hutton symposium on the origin of granites and related rocks; proceedings
Author(s): Law, R. D.Morgan, S. S.Casey, M.Sylvester, A. G.Nyman, M.
Author(s): Brown, P. E.editor
Author(s): Chappell, B. W.editor
Affiliation: Virginia Polytechnic Institute and State University, Department of Geological Sciences, Blacksburg, VA, United States
Affiliation: University of St. Andrews, Department of Geology, St. Andrews, United Kingdom
Pages: 361-375
Published: 1992
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
ISBN: 0-8137-2272-1
Meeting name: The second Hutton symposium on the Origin of granites and related rocks
Meeting location: Canberra, AUS, Australia
Meeting date: 19910923Sept. 23-28, 1991
References: 63
Accession Number: 1993-010086
Categories: Igneous and metamorphic petrologyStructural geology
Document Type: Serial Conference document
Bibliographic Level: Analytic
Annotation: Originally publ. in Transact. R. Soc. Edinburgh, Earth Sci., Vol. 83, parts 1 and 2
Illustration Description: illus. incl. sects., sketch maps
N32°30'00" - N42°00'00", W124°30'00" - W114°15'00"
Secondary Affiliation: Australian National University, AUS, Australia
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 1993
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