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Geochemical and Re-Os isotope constraints on the origin and age of the Songshugou peridotite massif in the Qinling orogen, central China

文献类型：期刊论文

作者Nie, Hu1; Yang, Jianzhou1,2,3; Zhou, Guangyan1; Liu, Chuanzhou2; Zheng, Jianping1; Zhang, Wen-Xiang1; Zhao, Yu-Jie1; Wang, Hao2; Wu, Yuanbao1
刊名LITHOS
出版日期2017-11-01
卷号292页码:307-319
ISSN号0024-4937
关键词Songshugou Peridotite Qinling Orogen Forearc Mantle Wedge Re-os Age Geochemistry South China Block
DOI10.1016/j.lithos.2017.09.009
文献子类Article
英文摘要The Songshugou peridotite massif in the Qinling orogenic belt is one of the largest orogenic spinel peridotite bodies in central China, but its origin remains controversial and its age is poorly constrained. We have carried out an integrated study of major and trace element composition, mineral chemistry, platinum group elements (PGE), as well as Re-Os isotope systematics of 1 harzburgite and 12 dunites from the Songshugou peridotite massif. These samples contain high Mg# olivine (90.0-91.3) and Cr# spinel (83.4-96.0). The harzburgite and dunites are characterized by relatively low whole-rock Al2O3 (0.32-0.60 wt.%), CaO (0.26-1.57 wt.%), and Na2O (0.07-0.12 wt.%) concentrations. The studied samples have very low concentrations of middle and heavy rare earth elements and exhibit enrichments in iridium-group platinum-group elements (IPGE) relative to palladium-group PGE. The Songshugou peridotites exhibit variable enrichments of light rare earth elements, large ion lithophile elements, Re, Zr, and Hf, which resulted from reactions with melt after their isolation from the convecting mantle. Combined with previous results, our data suggest that the Songshugou peridotites are highly refractory mantle residues derived from a forearc mantle wedge. Os-187/Os-188 values of the studied samples vary from 0.12073 to 0.12390, and Re-187/Os-188 ratios are 0.005-0.081. The average Re-Os model ages (T-MA) and maximum Re depletion model age (T-RD) of the Songshugou peridotites are ca. 1.2-1.1 Ga, suggesting a tectonic affinity to the South China Block and that the peridotites formed during the assembly of the Rodinia supercontinent. The Songshugou peridotites were sourced from a mantle wedge above a subduction zone, and finally incorporated into the underlying continental lithosphere by exhumation. (C) 2017 Elsevier B.V. All rights reserved.
WOS关键词SUBCONTINENTAL LITHOSPHERIC MANTLE ; NORTHERN TIBETAN PLATEAU ; DIAMOND-BEARING ZIRCONS ; SULU UHP TERRANE ; TECTONIC EVOLUTION ; GARNET PERIDOTITE ; EASTERN CHINA ; TRACE-ELEMENTS ; GEODYNAMIC IMPLICATIONS ; CONTINENTAL COLLISION
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000416185500020
资助机构Chinese 973 project(20150856106) ; Chinese 973 project(20150856106) ; National Natural Science Foundation of China(41625008 ; National Natural Science Foundation of China(41625008 ; 41573047 ; 41573047 ; 41273035) ; 41273035) ; Chinese 973 project(20150856106) ; Chinese 973 project(20150856106) ; National Natural Science Foundation of China(41625008 ; National Natural Science Foundation of China(41625008 ; 41573047 ; 41573047 ; 41273035) ; 41273035) ; Chinese 973 project(20150856106) ; Chinese 973 project(20150856106) ; National Natural Science Foundation of China(41625008 ; National Natural Science Foundation of China(41625008 ; 41573047 ; 41573047 ; 41273035) ; 41273035) ; Chinese 973 project(20150856106) ; Chinese 973 project(20150856106) ; National Natural Science Foundation of China(41625008 ; National Natural Science Foundation of China(41625008 ; 41573047 ; 41573047 ; 41273035) ; 41273035)
源URL[http://ir.iggcas.ac.cn/handle/132A11/82072]  
专题中国科学院地质与地球物理研究所
通讯作者Wu, Yuanbao
作者单位1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Fac Earth Sci, Wuhan 430074, Hubei, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Chinese Acad Geol Sci, Inst Geophys & Geochem Explorat, Langfang 065000, Peoples R China
推荐引用方式
GB/T 7714		 Nie, Hu,Yang, Jianzhou,Zhou, Guangyan,et al. Geochemical and Re-Os isotope constraints on the origin and age of the Songshugou peridotite massif in the Qinling orogen, central China[J]. LITHOS,2017,292:307-319.
APA Nie, Hu.,Yang, Jianzhou.,Zhou, Guangyan.,Liu, Chuanzhou.,Zheng, Jianping.,...&Wu, Yuanbao.(2017).Geochemical and Re-Os isotope constraints on the origin and age of the Songshugou peridotite massif in the Qinling orogen, central China.LITHOS,292,307-319.
MLA Nie, Hu,et al."Geochemical and Re-Os isotope constraints on the origin and age of the Songshugou peridotite massif in the Qinling orogen, central China".LITHOS 292(2017):307-319.

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来源：地质与地球物理研究所

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