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Magma source and tectonics of the Xiangshanzhong mafic-ultramafic intrusion in the Central Asian Orogenic Belt, NW China, traced from geochemical and isotopic signatures

文献类型：期刊论文

作者Tang, Dongmei1; Qin, Kezhang1; Su, Benxun1; Sakyi, Patrick Asamoah2; Liu, Yongsheng3; Mao, Qian4; Santosh, M.5,6; Ma, Yuguang4
刊名LITHOS
出版日期2013-06-01
卷号170页码:144-163
关键词Xiangshanzhong Mafic-ultramafic intrusion Clinopyroxene Parental magma Emplacement mechanism Central Asian Orogenic Belt
ISSN号0024-4937
DOI10.1016/j.lithos.2013.02.013
文献子类Article
英文摘要Several sulfide ore-bearing mafic-ultramafic intrusions occur along the southern margin of the Late Paleozoic Central Asian Orogenic Belt (COB) in north Xinjiang, NW China. Their origin, magma evolution and relationship with the Permian basalts in the region remain equivocal. In this study, we investigate the Xiangshanzhong mafic-ultramafic intrusion in eastern Tianshan, dominantly composed of diorite, hornblende gabbro, gabbro, hornblende pyroxenite, olivine websterite and lherzolite. We report the occurrence of olivine clinopyroxenite in the intrusive complex with visible pyroxene cumulate structure, high Mg, low Cr, Na, and Ti contents, and characterized by distinctively low trace element contents. Our data suggest that the clinopyroxene in the olivine clinopyroxenite probably crystallized from an earlier batch of magma. The rare earth element (REE) patterns and epsilon(Nd) values of the Xiangshanzhong mafic-ultramafic units suggest that these rocks represent cumulates of basaltic composition that were likely co-genetic and derived from the same magmatic source. The presence of phlogopite and amphibole, occurrence of Zr, Hf, Nb, and Ta negative anomalies, the trace element abundances of the parental magma, and the Nd isotopes (+5.9-+83) of whole-rocks suggest that the source of the Xiangshanzhong complexes may be a depleted mantle metasomatized by subducted slab-derived fluid or melt. Furthermore, the (Sr-87/Sr-86)(i) ratios, epsilon(Nd(t)) values and trace element geochemistry of whole-rock and clinopyroxene grains are consistent with those of the Permian Tuha basin basalts. The Xiangshanzhong intrusion has characteristics of both plume and subduction-related origin and we therefore speculate that the partial melting of subduction-related depleted mantle triggered by Permian plume activity during the post-collision extension regime generated the parental magmas of the Xiangshanzhong intrusion. (C) 2013 Elsevier B.V. All rights reserved.
WOS关键词ORE-FORMING PROCESSES ; NI SULFIDE DEPOSITS ; EASTERN TIANSHAN ; U-PB ; TARIM BASIN ; PERMIAN BASALTS ; MANTLE PLUME ; CONTINENTAL GROWTH ; SUBDUCTION ZONE ; NORTHWEST CHINA
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000319790100009
出版者ELSEVIER SCIENCE BV
资助机构Nature Science Foundation of China(41002026 ; Nature Science Foundation of China(41002026 ; Nature Science Foundation of China(41002026 ; Nature Science Foundation of China(41002026 ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; 41030424) ; 41030424) ; 41030424) ; 41030424) ; Nature Science Foundation of China(41002026 ; Nature Science Foundation of China(41002026 ; Nature Science Foundation of China(41002026 ; Nature Science Foundation of China(41002026 ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; 41030424) ; 41030424) ; 41030424) ; 41030424) ; Nature Science Foundation of China(41002026 ; Nature Science Foundation of China(41002026 ; Nature Science Foundation of China(41002026 ; Nature Science Foundation of China(41002026 ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; 41030424) ; 41030424) ; 41030424) ; 41030424) ; Nature Science Foundation of China(41002026 ; Nature Science Foundation of China(41002026 ; Nature Science Foundation of China(41002026 ; Nature Science Foundation of China(41002026 ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; 41030424) ; 41030424) ; 41030424) ; 41030424)
源URL[http://ir.iggcas.ac.cn/handle/132A11/87280]  
专题中国科学院地质与地球物理研究所
通讯作者Tang, Dongmei
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Univ Ghana, Dept Earth Sci, Legon, Accra, Ghana
3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
5.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
6.Kochi Univ, Fac Sci, Div Interdisciplinary Sci, Kochi 7808520, Japan
推荐引用方式
GB/T 7714		 Tang, Dongmei,Qin, Kezhang,Su, Benxun,et al. Magma source and tectonics of the Xiangshanzhong mafic-ultramafic intrusion in the Central Asian Orogenic Belt, NW China, traced from geochemical and isotopic signatures[J]. LITHOS,2013,170:144-163.
APA Tang, Dongmei.,Qin, Kezhang.,Su, Benxun.,Sakyi, Patrick Asamoah.,Liu, Yongsheng.,...&Ma, Yuguang.(2013).Magma source and tectonics of the Xiangshanzhong mafic-ultramafic intrusion in the Central Asian Orogenic Belt, NW China, traced from geochemical and isotopic signatures.LITHOS,170,144-163.
MLA Tang, Dongmei,et al."Magma source and tectonics of the Xiangshanzhong mafic-ultramafic intrusion in the Central Asian Orogenic Belt, NW China, traced from geochemical and isotopic signatures".LITHOS 170(2013):144-163.

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来源：地质与地球物理研究所

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