The Jinshajiang suture zone: tectono-stratigraphic subdivision and;revision of age

doi:10.1007/BF02877827

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	The Jinshajiang suture zone: tectono-stratigraphic subdivision and;revision of age
	Wang, XF 3; Metcalfe, I ; Jian, P ; He, LQ ; Wang, CS
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2000
卷号	43 期号:1 页码:10-22
关键词	Jinshajiang suture zone complex ophiolitic melange Paleo-Tethys
ISSN号	1006-9313
DOI	10.1007/BF02877827
英文摘要	Integrated study of rock assemblage, tectonic setting, geochemical feature, fossil contained and isotopic geochronology on the metamorphic mixed bodies, exposed in the Jinshajiang suture zone, suggests that one informal lithostratigraphic unit, the Eaqing Complex, and three tectono-stratigraphic units, the Jinshajiang ophiolitic melange, the Gajinxueshan Group and the Zhongxinrong Group, can be recognized there. It is first pointed out that the redefined Eaqing Complex might represent the Meso- to Neo-Proterozoic remnant metamorphic basement or microcontinental fragment in the Jinshajiang area. The original rocks of it should be older than (1627 +/-192) Ma based on the geochronological study. The zircon U-Pb age of plagiogranites within the Jinshajiang ophiolitic assemblage is dated for the first time at (294+/-3) Ma and (340+/-3) Ma respectively. The Jinshajiang ophiolite is approximately equivalent to the Ailaoshan ophiolite in the formation age, covering the interval from the Late Devonian to the Carboniferous. Dating of U-Pb age from basalt interbeds indicates that the redefined Gajinxueshan Group and Zhongxinrong Group may be considered Carboniferous to Permian and latest Permian to Middle Triassic in age. In geotectonic terms the Jinshajiang suture zone is thought to be a back-are basin in the eastern margin of the Paleo-Tethys. This back-are basin started in the Late Devonian, and formed in the Devonian-Carboniferous. The collision event around the Perrnian/Triassic boundary to the Middle Triassic led to the closure of the back-are basin and formation of suture.
学科主题	地层学与地史学
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000085514900002
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37381]
专题	中国地质调查局武汉地质调查中心
作者单位	1.Chinese Acad Geol Sci, Inst Geol & Mineral Resources, Yichang 443003, Peoples R China. 2.Univ New England, Asia Ctr, Armidale, NSW, Australia. 3.中国地质调查局武汉地质调查中心
推荐引用方式 GB/T 7714	Wang, XF,Metcalfe, I,Jian, P,et al. The Jinshajiang suture zone: tectono-stratigraphic subdivision and;revision of age[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2000,43(1):10-22.
APA	Wang, XF,Metcalfe, I,Jian, P,He, LQ,&Wang, CS.(2000).The Jinshajiang suture zone: tectono-stratigraphic subdivision and;revision of age.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,43(1),10-22.
MLA	Wang, XF,et al."The Jinshajiang suture zone: tectono-stratigraphic subdivision and;revision of age".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 43.1(2000):10-22.