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Constraints on the formation of the Baogutu reduced porphyry copper deposit (West Junggar, NW China): Assessing the role of mafic magmas in mineralization

文献类型：期刊论文

作者Wu, Chu1,2,3; Hong, Tao1,3,4; Xu, Xing-Wang1,3,5; Cao, Ming-Jian1,3; Li, Hao1,3; Ke, Qiang1,3; Li, Hang1,3; Dong, Lian-Hui1,3,6
刊名LITHOS
出版日期2019-07-01
卷号336页码:112-124
ISSN号0024-4937
关键词Gabbro Petrogenesis Cu-rich mafic magma Baogutu reduced porphyry copper deposit
DOI10.1016/j.lithos.2019.03.034
英文摘要The Baogutu porphyry copper deposit is a typically reduced porphyry copper deposit (RPCD), characterized by reduced, calc-alkaline, felsic shallow intrusions. A newly discovered gabbro, which contains 1182-1260 ppm Cu, provides an ideal window to reveal the genesis and formation of the Baogutu RPCD. A combined study of the petrological, geochronological, geochemical and isotopic characteristics of the Cu-bearing gabbro and granitoids in the Baogutu RPCD has been completed. The laser ablation inductively coupled plasma mass spectrometry (IA-ICP-MS) U-Pb dating of zircons from a gabbro, diorite and porphyritic diorite are 318.2 +/- 0.8 Ma (MSWD = 0.01, n = 16), 315.8 +/- 1.0 Ma (MSWD = 1.50, n = 16), and 314.9 +/- 0.6 Ma (MSWD = 0.12, n = 20), respectively. The geochemical and isotopic characteristics of the gabbro, diorite, and porphyritic diorite at Baogutu RPCD are all metaluminous, calc-alkaline series rocks with depletion in Nb, Ta, and Ti and enrichment in light rare earth elements (LREE) and large ion lithophile elements consistent with an arc-related setting. The relatively high Nd and Hf isotopes (epsilon Nd(t) = +6.9 to +7.5, epsilon Hf(t) = +8.8 to +14.4) and wide variations of major and trace elements suggest that the gabbro and diorite in the Baogutu RPCD were all derived from a mixture of melts of metasomatized mantle wedge, the hydrous slab, and old crustally derived materials. The high Mg andesites (HMA)/sanukite features (high Mg#, Cr and Ni content) of the gabbro suggest it was derived mainly from a metasomatized mantle-hydrous slab-derived melt source with only slightly contamination by the old crustal materials, whereas adakitic features of the diorite (high Al2O3 and Sr contents and Sr/Y ratios) suggest a greater role the melting of residual subducted oceanic crust with juvenile mantle materials. The porphyritic diorite, which inherited the geochemical characteristics of diorite, was probably derived from a similar parental magma but the low epsilon Nd(t) of +1.4, old T-2DM (Nd) age of 961 Ma and enrichment in Zr and Hf suggest a greater degree of crustal contamination. The high content of Cu and high oxidation state of the gabbro is consisted with it having formed early from an unusually Cu-rich parental magma. This magma would have provided abundant metal and sulfides which would have been mobilized and reconcentrated by later ore bearing fluids linked to the intermediate to acid porphyry intrusions in the Baogutu RPCD. (C) 2019 Elsevier B.V. All rights reserved.
WOS关键词SETOUCHI VOLCANIC BELT ; HIGH-MG ANDESITES ; MO-AU DEPOSIT ; U-PB ; CU DEPOSIT ; CONTINENTAL-CRUST ; EAST JUNGGAR ; ARC MAGMAS ; FRACTIONAL CRYSTALLIZATION ; CHEMICAL CLASSIFICATION
资助项目National Key R&D Program of China[2017YFC0601201] ; National Key R&D Program of China[2018YFC0604002] ; National Natural Science Foundation of China[41802093] ; China Postdoctoral Science Foundation[2018M630201] ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; UCAS Joint PhD Training Program of China[UCAS (2015)37] ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences[KLMR2017-10]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000470043100008
资助机构National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; UCAS Joint PhD Training Program of China ; UCAS Joint PhD Training Program of China ; UCAS Joint PhD Training Program of China ; UCAS Joint PhD Training Program of China ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; UCAS Joint PhD Training Program of China ; UCAS Joint PhD Training Program of China ; UCAS Joint PhD Training Program of China ; UCAS Joint PhD Training Program of China ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; UCAS Joint PhD Training Program of China ; UCAS Joint PhD Training Program of China ; UCAS Joint PhD Training Program of China ; UCAS Joint PhD Training Program of China ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; 2018 Sino-German (CSC-DAAD) Postdoc Scholarship Program ; UCAS Joint PhD Training Program of China ; UCAS Joint PhD Training Program of China ; UCAS Joint PhD Training Program of China ; UCAS Joint PhD Training Program of China ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Foundation of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/92264]  
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Hong, Tao
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Beijing Urban Construct Explorat & Surveying Desi, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
4.Univ Freiburg, Inst Earth & Environm Sci, D-79104 Freiburg, Germany
5.Chinese Acad Sci, Xinjiang Res Ctr Mineral Resources, Urumqi 830011, Peoples R China
6.Xinjiang Bur Geol & Mineral Resources, Urumqi 830011, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Chu,Hong, Tao,Xu, Xing-Wang,et al. Constraints on the formation of the Baogutu reduced porphyry copper deposit (West Junggar, NW China): Assessing the role of mafic magmas in mineralization[J]. LITHOS,2019,336:112-124.
APA Wu, Chu.,Hong, Tao.,Xu, Xing-Wang.,Cao, Ming-Jian.,Li, Hao.,...&Dong, Lian-Hui.(2019).Constraints on the formation of the Baogutu reduced porphyry copper deposit (West Junggar, NW China): Assessing the role of mafic magmas in mineralization.LITHOS,336,112-124.
MLA Wu, Chu,et al."Constraints on the formation of the Baogutu reduced porphyry copper deposit (West Junggar, NW China): Assessing the role of mafic magmas in mineralization".LITHOS 336(2019):112-124.

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来源：地质与地球物理研究所

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