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  4. 中国科学院矿产资源研究重点实验室
Sulfur and copper isotopic signatures of chalcopyrite at Kalatongke and Baishiquan: Insights into the origin of magmatic Ni-Cu sulfide deposits

文献类型：期刊论文

作者Tang, Dongmei2,4; Qin, Kezhang2,3,4; Su, Benxun2,3,4; Mao, Yajing2,4; Evans, Noreen J.1; Niu, Yanjie2,3,4; Kang, Zhen2,3,4
刊名GEOCHIMICA ET COSMOCHIMICA ACTA
出版日期2020-04-15
卷号275页码:209-228
关键词Ni-Cu sulfide deposit S and Cu isotopes Mantle source Crustal contamination Central Asian Orogenic Belt
ISSN号0016-7037
DOI10.1016/j.gca.2020.02.015
英文摘要Sulfide Cu isotope systematic has been used as a metallogenic tracer in various deposits; however, only rarely in magmatic Ni-Cu sulfide deposits. Here we present chalcopyrite delta S-34 and delta Cu-65 data for the Kalatongke and Baishiquan Ni-Cu sulfide deposits in the Central Asian Orogenic Belt. The Kalatongke deposit yields delta S-34 of -3.99 parts per thousand to 3.30 parts per thousand and delta Cu-65 of -1.32 parts per thousand to 0.07 parts per thousand, whereas chalcopyrite from the Baishiquan deposit has delta S-34 values ranging from 1.70%e to 4.98%e and delta Cu-65 from -0.40 parts per thousand to 0.59 parts per thousand. These isotopic ratios show no correlation with intrusion/orebody shape, location of sample in the orebody, lithofacies or type of mineralization. Based on Kalatongke and Baishiquan delta S-34 data, our multicomponent modeling suggests that, with an increase in the relative crustal component contribution, the measured delta S-34 values in sulfide ores approach the value of the contaminant. Mass ratios (R') of silicate magma/(xenomelt + sulfide xenomelt + resitite + crystalline olivine) of 250-800 in the Kalatongke and 10-1000 in the Baishiquan deposit, yield delta S-34 values of -1.78 parts per thousand to 1.74 parts per thousand and 1.70 parts per thousand to 4.98 parts per thousand in these deposits. Contamination by host tuff and shale material with delta S-34 values of -7.2 parts per thousand to 3.3 parts per thousand reasonably explains the negative delta S-34 in the Kalatongke ores. A lack of correlation between the Kalatongke and Baishiquan chalcopyrite delta Cu-65 values and Cu or S contents (or Cu/Ni ratios) indicates that Cu isotopic fractionation was not controlled by sulfide fractional crystallization, but instead by contamination and the mantle source. Multicomponent modeling shows that an R' factor between 10 and 1000 can reproduce most delta Cu-65 signatures in sulfide ores from the Kalatongke and Baishiquan deposits, with the exception of a few negative delta Cu-65 values. Undetected contamination and heterogeneous mantle resulting from different degrees of partial melting and metasomatism in the mantle source may explain these negative values and the wide range of delta Cu-65 noted in magmatic sulfide deposits worldwide. The Cu and S isotopes in sulfide from the magmatic Ni-Cu sulfide deposits can be utilized as indicators of crustal contamination and the nature of the mantle source. (C) 2020 Elsevier Ltd. All rights reserved.
WOS关键词MIDCONTINENT RIFT SYSTEM ; VOISEYS BAY ; S ISOTOPE ; PGE DEPOSIT ; MULTIPLE S ; MO DEPOSIT ; NW CHINA ; PARAGNEISS ASSIMILATION ; NORILSK PROVINCE ; STABLE-ISOTOPE
资助项目National Key R&D Program of China[2017YFC0601204] ; National Natural Science Foundation of China[41830430] ; National Natural Science Foundation of China[41472075]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000520018300012
出版者PERGAMON-ELSEVIER SCIENCE LTD
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 ; 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 ; 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 ; 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
源URL[http://ir.iggcas.ac.cn/handle/132A11/95512]  
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Tang, Dongmei
作者单位1.Curtin Univ, John de Laeter Ctr, Sch Earth & Planetary Sci, Perth, WA 6845, Australia
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Tang, Dongmei,Qin, Kezhang,Su, Benxun,et al. Sulfur and copper isotopic signatures of chalcopyrite at Kalatongke and Baishiquan: Insights into the origin of magmatic Ni-Cu sulfide deposits[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2020,275:209-228.
APA Tang, Dongmei.,Qin, Kezhang.,Su, Benxun.,Mao, Yajing.,Evans, Noreen J..,...&Kang, Zhen.(2020).Sulfur and copper isotopic signatures of chalcopyrite at Kalatongke and Baishiquan: Insights into the origin of magmatic Ni-Cu sulfide deposits.GEOCHIMICA ET COSMOCHIMICA ACTA,275,209-228.
MLA Tang, Dongmei,et al."Sulfur and copper isotopic signatures of chalcopyrite at Kalatongke and Baishiquan: Insights into the origin of magmatic Ni-Cu sulfide deposits".GEOCHIMICA ET COSMOCHIMICA ACTA 275(2020):209-228.

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来源：地质与地球物理研究所

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