The spatial distribution of microfaults and the tectonic stress field analysis during brittle deformation of the main hole core at Chinese Continental Sciences Drilling (CCSD)

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	The spatial distribution of microfaults and the tectonic stress field analysis during brittle deformation of the main hole core at Chinese Continental Sciences Drilling (CCSD)
	Cui, JW (Cui JunWen); Tang, ZM (Tang ZheMin); Wang, LJ (Wang LianJie); Li, PW (Li PengWu)
刊名	ACTA PETROLOGICA SINICA
	2009
卷号	25 期号:7 页码:1619-1626
关键词	Chinese Continental Sciences Drilling (CCSD) Microfaults Spatial distribution Brittle deformation Level compression Tectonic stress field
ISSN号	1000-0569
英文摘要	There development a very rich brittle microfaults within CCSD main hole core, more than 5158m deep hole, according to their spatial distribution, can be summed up as four microfault systems (or groups), i.e., the main NNE microfault system, the NW microfault system, the NE microfault group and the near EW microfault group, and two stage tectonic stress fields, i.e., dominantly SEE-NWW level compression tectonic stress fields and NE-SW level compression tectonic stress fields. The SEE-NWW level compression tectonic stress field throughout in the whole process of exhumation of the high-pressure-ultrahigh pressure metamorphic rocks, indicating that (luring the exhumation process, tectonic stress field of the deep-seated ductile deformation phase and tectonic stress field of the shallow brittle deformation stage, is highly consistency. However, flow cleavage and microfault Pole isogram showed that the deformation of ductile deformation stages is relatively simple than that of brittle deformation stages, deep happened basically is a thrust-type shear strain, while the shallow brittle deformation domain, with the exception of the succession of thrust-type shear strain, the latter often have a structure superimposed extension and strike-slip effect and hence has a more complex strain images. The NE-SW level compression tectonic stress field, in time later than the SEE-NWW level compression tectonic stress field, which is the main reason leading to pre-existing NE thrust-type flow cleavage (associated with early SEE-NWW level compression) occurred from NE to SW sliding. Comparison microfaults and flow cleavage isogram Pole of different rock types, whether it is a very dense type, or a very dense distribution of rock types are not subject to the impact on microfaults and flow cleavage formation and rock types (lithology) has nothing to do, and is mainly affected by structural factors, therefore, the use of microfaults and flow cleavage (foliation) a combination of analysis, Study tectonic stress field and dynamic processes of high pressure - ultrahigh pressure metamorphic belt exhumation phase, there are other ways irreplaceable effect.
学科主题	构造地质学
WOS关键词	PRESSURE METAMORPHIC TERRANE ; BOREHOLE ; EXHUMATION ; DYNAMICS ; UPLIFT ; ROCKS
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000268971200007
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38977]
专题	中国地质调查局
作者单位	Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Cui, JW ,Tang, ZM ,Wang, LJ ,et al. The spatial distribution of microfaults and the tectonic stress field analysis during brittle deformation of the main hole core at Chinese Continental Sciences Drilling (CCSD)[J]. ACTA PETROLOGICA SINICA,2009,25(7):1619-1626.
APA	Cui, JW ,Tang, ZM ,Wang, LJ ,&Li, PW .(2009).The spatial distribution of microfaults and the tectonic stress field analysis during brittle deformation of the main hole core at Chinese Continental Sciences Drilling (CCSD).ACTA PETROLOGICA SINICA,25(7),1619-1626.
MLA	Cui, JW ,et al."The spatial distribution of microfaults and the tectonic stress field analysis during brittle deformation of the main hole core at Chinese Continental Sciences Drilling (CCSD)".ACTA PETROLOGICA SINICA 25.7(2009):1619-1626.