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Residual stress preserved in quartz from the San Andreas Fault Observatory at Depth

Chen Kai, Martin Kunz, Nobumichi Tamura and Hans-Rudolf Wenk
Residual stress preserved in quartz from the San Andreas Fault Observatory at Depth
Geology (Boulder) (March 2015) 43 (3): 219-222

Abstract

We report on measurements of residual stress up to 300 MPa with a microfocused synchrotron X-ray beam in quartz fragments in a cataclasite from the damage zone of the San Andreas fault, California (USA). Samples were extracted from the San Andreas Fault Observatory at Depth drill core at a depth of 2.7 km. Stresses were derived from lattice distortions observed on Laue diffraction images. These stresses are distributed nonhomogeneously at the micron scale and are much higher than bulk-rock strengths of fault gouge, suggesting different processes at the microscopic and macroscopic scales. Our results indicate that residual lattice strain in quartz is a potential paleopiezometer to estimate stress in deformed rocks.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 43
Serial Issue: 3
Title: Residual stress preserved in quartz from the San Andreas Fault Observatory at Depth
Affiliation: Xi'an Jiantong University, Laboratory for Mechanical Behavior of Materials, Xi'an, China
Pages: 219-222
Published: 201503
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 27
Accession Number: 2015-054230
Categories: Geophysics of minerals and rocks
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 2015077
Illustration Description: illus.
Secondary Affiliation: Lawrence Berkeley National Laboratory, USA, United StatesUniversity of California, Berkeley, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201525
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