Critical shear stress for mechanical twinning of jadeite - an experimental study

doi:10.1016/S0040-1951(03)00242-7

	Critical shear stress for mechanical twinning of jadeite - an experimental study
	Orzol, J ; Trepmann, CA ; Stockhert, B ; Shi, G
刊名	TECTONOPHYSICS
	2003-09-11
卷号	372 期号:3-4 页码:135-145
关键词	deformation experiments mechanical twinning jadeite paleopiezometry
ISSN号	0040-1951
DOI	10.1016/S0040-1951(03)00242-7
文献子类	Article
英文摘要	Coarse-grained natural jadeitite samples from Myanmar were experimentally deformed in a Griggs-type solid-medium apparatus at strain rates of 2(.)10(-5) and 5(.)10(-6) s(-1) and temperatures of 900 and 1000 degreesC. The microfabrics of the deformed samples are investigated by scanning electron microscopy (SEM) using the electron backscatter diffraction (EBSD) technique. The critical shear stress for twinning in the (100) [001] system is derived from the orientation distribution of jadeite crystals with and without mechanical twins. The results indicate a homogeneous stress field within the sample and a critical shear stress of 150+/-25 MPa, which compares well to that determined by Kolle and Blacic [J. Geophys. Res. 87 (1982) 4019] for mechanical twinning of other clinopyroxenes. With the critical shear stress known, mechanical twinning of jadeite can be used as a paleopiezometer for high stress tectonic environments. (C) 2003 Elsevier B.V. All rights reserved.
WOS关键词	POSTSEISMIC CREEP ; WESTERN ALPS ; DEFORMATION ; PRESSURE ; ORIENTATION ; DIOPSIDE ; ROCKS ; FLOW ; SEM
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000186405600002
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/78129]
专题	中国科学院地质与地球物理研究所
通讯作者	Orzol, J
作者单位	1.Ruhr Univ Bochum, Inst Geol Mineral & Geophys, D-4630 Bochum, Germany 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Orzol, J,Trepmann, CA,Stockhert, B,et al. Critical shear stress for mechanical twinning of jadeite - an experimental study[J]. TECTONOPHYSICS,2003,372(3-4):135-145.
APA	Orzol, J,Trepmann, CA,Stockhert, B,&Shi, G.(2003).Critical shear stress for mechanical twinning of jadeite - an experimental study.TECTONOPHYSICS,372(3-4),135-145.
MLA	Orzol, J,et al."Critical shear stress for mechanical twinning of jadeite - an experimental study".TECTONOPHYSICS 372.3-4(2003):135-145.