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Geochemistry of the similar to 326 Ma Xinyuan mafic intrusion in the Eastern Junggar Terrane, Northwest China: implications for tectonic setting and magmatic Ni-Cu mineralization potential

文献类型：期刊论文

作者Mao, Ya-Jing1; Tang, Dong-Mei1; Qin, Ke-Zhang1; Taranovic, Valentina2
刊名INTERNATIONAL GEOLOGY REVIEW
出版日期2017
卷号59期号:10页码:1276-1291
关键词Magmatic Ni-cu Deposit Northern Xinjiang Central Asian Orogenic Belt Xinyuan Mafic Intrusion Eastern Junggar Terrane
ISSN号0020-6814
DOI10.1080/00206814.2016.1209435
文献子类Article
英文摘要The Xinyuan intrusion of the Eastern Junggar terrane is one of the mafic-ultramafic intrusions located in the Northern Xinjiang region and is associated with the southern part of the Central Asian Orogenic Belt (CAOB). Based on the secondary ion mass spectrometry (SIMS) zircon U-Pb dating, the intrusion is 326.2 +/- 1.1Ma old. Positive zircon Hf(t) values (+12.4 to +15.7) and mantle-like O-18 values (5.0-5.5 parts per thousand) suggest that the parental magma was derived from a depleted mantle source with a low degree of crustal contamination. Significant negative Nb-Ta anomaly and large iron lithophile element (LILE) enrichment of the Xinyuan intrusion are identical to those of the coeval basalt-andesite rocks in the study area. Temporal, spatial, and geochemical evidence suggest that the Xinyuan intrusion and coeval basalt-andesite rocks are associated with the northward subduction of the Kelameili Ocean. This, together with the ages of alkaline granites and sedimentary record in the Eastern Junggar, suggests that closure of the Kelameili Ocean was probably between 326Ma and 310Ma. Fractional crystallization modelling indicates that the parental magma of the Xinyuan intrusion has experienced significant fractional crystallization at depth. The Xinyuan parental magma was estimated to contain similar to 20 ppm Ni, which is significantly lower than the coeval basaltic magma (similar to 200 ppm). Magma that is depleted in Ni has potentially undergone extensive fractional crystallization, during which most of the Ni has been sequestered into olivine in the early stages. The Xinyuan intrusion has Hf isotope and trace element characteristics similar to the Permian sulphide-bearing mafic-ultramafic intrusions. However, the low degree of crustal contamination apparent in O-18 data is more characteristic for the pre-Permian sulphide-poor intrusions in the area. Extensive fractional crystallization and the low degree of crustal contamination in the parental magma of Xinyuan intrusion experienced are suggestive of a low-magmatic Ni-Cu mineralization potential.
WOS关键词ASIAN OROGENIC BELT ; U-PB GEOCHRONOLOGY ; NI-CU-(PGE) SULFIDE DEPOSIT ; SR-ND ISOTOPES ; ULTRAMAFIC INTRUSION ; NW CHINA ; VOLCANIC-ROCKS ; CONTINENTAL GROWTH ; ZIRCON MEGACRYSTS ; SANTANGHU BASIN
WOS研究方向Geology
语种英语
WOS记录号WOS:000403145800004
出版者TAYLOR & FRANCIS INC
资助机构National Natural Science Foundation of China(41472075 ; China Postdoctoral Science Foundation(2015M570146) ; 41502095) ; National Natural Science Foundation of China(41472075 ; China Postdoctoral Science Foundation(2015M570146) ; 41502095) ; National Natural Science Foundation of China(41472075 ; China Postdoctoral Science Foundation(2015M570146) ; 41502095) ; National Natural Science Foundation of China(41472075 ; China Postdoctoral Science Foundation(2015M570146) ; 41502095)
源URL[http://ir.iggcas.ac.cn/handle/132A11/52866]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Qin, Ke-Zhang
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Wayne State Univ, Dept Geol, Detroit, MI USA
推荐引用方式
GB/T 7714		 Mao, Ya-Jing,Tang, Dong-Mei,Qin, Ke-Zhang,et al. Geochemistry of the similar to 326 Ma Xinyuan mafic intrusion in the Eastern Junggar Terrane, Northwest China: implications for tectonic setting and magmatic Ni-Cu mineralization potential[J]. INTERNATIONAL GEOLOGY REVIEW,2017,59(10):1276-1291.
APA Mao, Ya-Jing,Tang, Dong-Mei,Qin, Ke-Zhang,&Taranovic, Valentina.(2017).Geochemistry of the similar to 326 Ma Xinyuan mafic intrusion in the Eastern Junggar Terrane, Northwest China: implications for tectonic setting and magmatic Ni-Cu mineralization potential.INTERNATIONAL GEOLOGY REVIEW,59(10),1276-1291.
MLA Mao, Ya-Jing,et al."Geochemistry of the similar to 326 Ma Xinyuan mafic intrusion in the Eastern Junggar Terrane, Northwest China: implications for tectonic setting and magmatic Ni-Cu mineralization potential".INTERNATIONAL GEOLOGY REVIEW 59.10(2017):1276-1291.

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来源：地质与地球物理研究所

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