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An 850-820 Ma LIP dismembered during breakup of the Rodinia supercontinent and destroyed by Early Paleozoic continental subduction in the northern Tibetan Plateau, NW China
Xu, Xin1; Song, Shuguang1; Allen, Mark B.2; Ernst, Richard E.3,4; Niu, Yaoling2,5; Su, Li6
2016-09-01
发表期刊PRECAMBRIAN RESEARCH
卷号282页码:52-73
文章类型Article
摘要Neoproterozoic intraplate magmatism is widely distributed in NW China and generally thought to be related to the breakup of the Rodinia supercontinent. Here we report a fragmented Large Igneous Province (LIP) formed at 850-820 Ma in the northern margin of the Qaidam block, northern Tibetan Plateau (named herein as the "North Qaidam LIP"). The associated rocks have undergone various grades of metamorphism from greenschist to ultrahigh-pressure (UHP) eclogite facies, including the greenschist-facies Yingfeng dolerite dikes and basalts (846-821 Ma), the amphibolite- to HP granulite-facies Aolaoshan meta-volcanic sequence (protolith age of 832 Ma and metamorphic age of 439 Ma), and the North Qaidam UHP eclogites (protolith age of 847-828 Ma and metamorphic age of 440-420 Ma). Geochemical data reveal that they resemble present-day E-MORB/OIB and typical continental flood basalts. These features, together with high potential temperatures (T-p = 1434-1524 degrees C) for "primary" magmas, suggest that these basaltic rocks were most likely derived from a mantle plume source and were emplaced in a continental extensional environment.
关键词North Qaidam Lip Dolerite Dike And Basalt Eclogite Mantle Plume Breakup Of Rodinia Continental Subduction
DOI10.1016/j.precamres.2016.07.007
收录类别SCI
语种英语
WOS记录号WOS:000382273100003
引用统计
被引频次:11[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
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条目标识符http://ir.qdio.ac.cn/handle/337002/135870
专题海洋地质与环境重点实验室
作者单位1.Peking Univ, Sch Earth & Space Sci, MOE Key Lab Orogen Belt & Crustal Evolut, Beijing 100871, Peoples R China
2.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
3.Carleton Univ, Dept Earth Sci, Ottawa, ON K1S 5B6, Canada
4.Tomsk State Univ, Fac Geol & Geog, Tomsk, Russia
5.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
6.China Univ Geosci, Geol Lab Ctr, Beijing 100083, Peoples R China
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Xu, Xin,Song, Shuguang,Allen, Mark B.,et al. An 850-820 Ma LIP dismembered during breakup of the Rodinia supercontinent and destroyed by Early Paleozoic continental subduction in the northern Tibetan Plateau, NW China[J]. PRECAMBRIAN RESEARCH,2016,282:52-73.
APA Xu, Xin,Song, Shuguang,Allen, Mark B.,Ernst, Richard E.,Niu, Yaoling,&Su, Li.(2016).An 850-820 Ma LIP dismembered during breakup of the Rodinia supercontinent and destroyed by Early Paleozoic continental subduction in the northern Tibetan Plateau, NW China.PRECAMBRIAN RESEARCH,282,52-73.
MLA Xu, Xin,et al."An 850-820 Ma LIP dismembered during breakup of the Rodinia supercontinent and destroyed by Early Paleozoic continental subduction in the northern Tibetan Plateau, NW China".PRECAMBRIAN RESEARCH 282(2016):52-73.
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