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Two different types of granitoids in the Suyunhe large porphyry Mo deposit, NW China and their genetic relationships with molybdenum mineralization

文献类型：期刊论文

作者Zhong, Shihua1,2; Seltmann, Reimar3; Shen, Ping2
刊名ORE GEOLOGY REVIEWS
出版日期2017-08-01
卷号88页码:116-139
关键词Porphyry Mo deposit Adakite Ce4+/Ce3+ Suyunhe West Junggar
ISSN号0169-1368
DOI10.1016/j.oregeorev.2017.04.012
文献子类Article
英文摘要The Suyunhe large porphyry Mo deposit (similar to 0.57 Mt molybdenum), located in the West Junggar, NW China, is the largest known porphyry Mo deposit in Xinjiang. Granitoids in this deposit are mainly characterized by three closely spaced intrusive centers (known as stocks I, II and III respectively). The stocks I and III mainly consist of barren granodiorite porphyry and tonalite porphyry, whereas the stock II is mainly composed of fertile monzonitic granite porphyry and granite porphyry. Based on detailed major and trace element, and Sr-Nd isotopic analyses, two distinct compositional groups can be identified. The first group of high-silica end-members (HSE) is characterized by high SiO2 (mostly >75 wt%), low MgO (0.07-0.69 wt%) and Mg# (0.19-0.36), significant Eu depletion in the chondrite-normalized diagram, and low Sr/Y and La/yb, as well as noticeably negative anomalies of Ba, Sr, P and Ti in the primitive mantle-normalized diagram. The second group of low-silica end-members (LSE), however, displays adakite-like features with lower SiO2 (<75 wt%), higher MgO (0.52-1.32 wt%) and Mg# (0.32-0.52; mostly >0.4), and higher Sr/Y (mostly >20) and La/Yb (>8). The depleted Sr-Nd isotopic characteristics (epsilon(Nd)(T) = 3.5-6.4 and I-sr, = 0.7026-0.7055) and young two-stage model ages of HSE and LSE indicate that they were both derived from partial melting of juvenile lower crust that might be triggered byasthenosphere upwelling subsequent to a slab rollback event. However, the depths of initial melting might be different. The current evidence demonstrates that HSE in the Suyunhe deposit formed by partial melting of juvenile crust at depths of less than similar to 33 km with a plagioclase residue, whereas that for LSE occurred at depths of >40 km where a garnet residue existed and the crust was thickened. The lower source depth, as well as subsequently strong plagioclase fractionation, results in the absence of adakite-like characteristics in HSE.
WOS关键词ZIRCON U-PB ; ASIAN OROGENIC BELT ; WESTERN JUNGGAR EVIDENCE ; TRACE-ELEMENT ; COPPER-DEPOSITS ; SR-ND ; CONTINENTAL-CRUST ; RIDGE SUBDUCTION ; CU DEPOSIT ; INTRAOCEANIC SUBDUCTION
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000405252200007
出版者ELSEVIER SCIENCE BV
资助机构National Natural Science Foundation of China(U1303293 ; IUGS-UNESCO(IGCP-592) ; Key Deployment Project of the Chinese Academy of Sciences(KJZD-EW-TZ-G07) ; National 305 Project(2011BAB06B01) ; 41390442 ; 41272109) ; National Natural Science Foundation of China(U1303293 ; IUGS-UNESCO(IGCP-592) ; Key Deployment Project of the Chinese Academy of Sciences(KJZD-EW-TZ-G07) ; National 305 Project(2011BAB06B01) ; 41390442 ; 41272109) ; National Natural Science Foundation of China(U1303293 ; IUGS-UNESCO(IGCP-592) ; Key Deployment Project of the Chinese Academy of Sciences(KJZD-EW-TZ-G07) ; National 305 Project(2011BAB06B01) ; 41390442 ; 41272109) ; National Natural Science Foundation of China(U1303293 ; IUGS-UNESCO(IGCP-592) ; Key Deployment Project of the Chinese Academy of Sciences(KJZD-EW-TZ-G07) ; National 305 Project(2011BAB06B01) ; 41390442 ; 41272109)
源URL[http://ir.iggcas.ac.cn/handle/132A11/46646]  
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Seltmann, Reimar
作者单位1.Chinese Acad Geol Sci, Inst Mineral Resources, MLR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
3.Nat Hist Museum, Ctr Russian & Cent EurAsian Mineral Studies, Dept Earth Sci, London SW7 5BD, England
推荐引用方式
GB/T 7714		 Zhong, Shihua,Seltmann, Reimar,Shen, Ping. Two different types of granitoids in the Suyunhe large porphyry Mo deposit, NW China and their genetic relationships with molybdenum mineralization[J]. ORE GEOLOGY REVIEWS,2017,88:116-139.
APA Zhong, Shihua,Seltmann, Reimar,&Shen, Ping.(2017).Two different types of granitoids in the Suyunhe large porphyry Mo deposit, NW China and their genetic relationships with molybdenum mineralization.ORE GEOLOGY REVIEWS,88,116-139.
MLA Zhong, Shihua,et al."Two different types of granitoids in the Suyunhe large porphyry Mo deposit, NW China and their genetic relationships with molybdenum mineralization".ORE GEOLOGY REVIEWS 88(2017):116-139.

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来源：地质与地球物理研究所

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