中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
Ore Genesis of the Kalatongke Cu-Ni Sulfide Deposits, Western China: Constraints from Volatile Chemical and Carbon Isotopic Compositions

文献类型：期刊论文

作者Fu Piaoer1; Tang Qingyan1; Zhang Mingjie1; Zhang Zhaowei2; Li Liwu3; Li Wenyuan2
刊名ACTA GEOLOGICA SINICA-ENGLISH EDITION
出版日期2012-06-01
卷号86期号:3页码:568-578
关键词Ore genesis chemical composition carbon isotope volatile mafic-ultramafic intrusion Kalatongke Cu-Ni sulfide deposits Xinjiang
ISSN号1000-9515
DOI10.1111/j.1755-6724.2012.00686.x
文献子类Article
英文摘要The Kalatongke CuNi sulfide deposits located in the East Junggar terrane, northern Xinjiang, western China are the largest magmatic sulfide deposits in the Central Asian Orogenic Belt (CAOB). The chemical and carbon isotopic compositions of the volatiles trapped in olivine, pyroxene and sulfide mineral separates were analyzed by vacuum stepwise-heating mass spectrometry. The results show that the released volatiles are concentrated at three temperature intervals of 200-400 degrees C, 400-900 degrees C and 900-1200 degrees C. The released volatiles from silicate mineral separates at 400-900 degrees C and 900-1200 degrees C have similar chemical and carbon isotopic compositions, which are mainly composed of H2O (av. similar to 92 mol%) with minor H2, CO2, H2S and SO2, and they are likely associated with the ore-forming magmatic volatiles. Light d13CCO2 values (from 20.86 parts per thousand to 12.85 parts per thousand) of pyroxene indicate crustal contamination occurred prior to or synchronous with pyroxene crystallization of mantle-derived ore-forming magma. The elevated contents of H2 and H2O in the olivine and pyroxene suggest a deep mantle-originated ore-forming volatile mixed with aqueous volatiles from recycled subducted slab. High contents of CO2 in the ore-forming magma volatiles led to an increase in oxygen fugacity, and thereby reduced the solubility of sulfur in the magma, then triggered sulfur saturation followed by sulfide melt segregation; CO2 contents correlated with Cu contents in the whole rocks suggest that a supercritical state of CO2 in the ore-forming magma system under high temperature and pressure conditions might play a key role in the assemblage of huge Cu and Ni elements. The volatiles released from constituent minerals of intrusion 1* have more CO2 and SO2 oxidized gases, higher CO2/CH4 and SO2/H2S ratios and lighter d13CCO2 than those of intrusions 2# and 3#. This combination suggests that the higher oxidation state of the volatiles in intrusion 1# than intrusions 2# and 3#, which could be one of key ore-forming factors for large amounts of ores and high contents of Cu and Ni in intrusion 1#. The volatiles released at 200-400 degrees C are dominated by H2O with minor CO2, N2+CO and SO2, with d13CCO2, values (25.66 parts per thousand to 22.98 parts per thousand) within the crustal ranges, and are considered to be related to secondary tectonic hydrothermal activities.
WOS关键词MAFIC-ULTRAMAFIC INTRUSIONS ; NW CHINA ; NORTHERN XINJIANG ; PRINCIPAL CHARACTERISTICS ; GEODYNAMIC IMPLICATIONS ; ALTAY OROGENS ; FLOOD BASALTS ; MANTLE PLUME ; GEOCHEMISTRY ; EVOLUTION
WOS研究方向Geology
语种英语
WOS记录号WOS:000306065300005
出版者WILEY-BLACKWELL
资助机构NSF of China(41072056 ; NSF of China(41072056 ; Key Projects of China Geological Survey(1212011121092) ; Key Projects of China Geological Survey(1212011121092) ; MOE(311010) ; MOE(311010) ; 40772058 ; 40772058 ; 91014003 ; 91014003 ; 40534020 ; 40534020 ; 40772062) ; 40772062) ; NSF of China(41072056 ; NSF of China(41072056 ; Key Projects of China Geological Survey(1212011121092) ; Key Projects of China Geological Survey(1212011121092) ; MOE(311010) ; MOE(311010) ; 40772058 ; 40772058 ; 91014003 ; 91014003 ; 40534020 ; 40534020 ; 40772062) ; 40772062) ; NSF of China(41072056 ; NSF of China(41072056 ; Key Projects of China Geological Survey(1212011121092) ; Key Projects of China Geological Survey(1212011121092) ; MOE(311010) ; MOE(311010) ; 40772058 ; 40772058 ; 91014003 ; 91014003 ; 40534020 ; 40534020 ; 40772062) ; 40772062) ; NSF of China(41072056 ; NSF of China(41072056 ; Key Projects of China Geological Survey(1212011121092) ; Key Projects of China Geological Survey(1212011121092) ; MOE(311010) ; MOE(311010) ; 40772058 ; 40772058 ; 91014003 ; 91014003 ; 40534020 ; 40534020 ; 40772062) ; 40772062)
源URL[http://ir.iggcas.ac.cn/handle/132A11/84426]  
专题中国科学院地质与地球物理研究所
通讯作者Zhang Mingjie
作者单位1.Lanzhou Univ, Sch Earth Sci, Key Lab Western Chinas Environm Syst MOE, Lanzhou 730000, Peoples R China
2.CGS, Xian Inst Geol & Mineral Resources, Xian 710054, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource Res, Lanzhou 730000, Peoples R China
推荐引用方式
GB/T 7714		 Fu Piaoer,Tang Qingyan,Zhang Mingjie,et al. Ore Genesis of the Kalatongke Cu-Ni Sulfide Deposits, Western China: Constraints from Volatile Chemical and Carbon Isotopic Compositions[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2012,86(3):568-578.
APA Fu Piaoer,Tang Qingyan,Zhang Mingjie,Zhang Zhaowei,Li Liwu,&Li Wenyuan.(2012).Ore Genesis of the Kalatongke Cu-Ni Sulfide Deposits, Western China: Constraints from Volatile Chemical and Carbon Isotopic Compositions.ACTA GEOLOGICA SINICA-ENGLISH EDITION,86(3),568-578.
MLA Fu Piaoer,et al."Ore Genesis of the Kalatongke Cu-Ni Sulfide Deposits, Western China: Constraints from Volatile Chemical and Carbon Isotopic Compositions".ACTA GEOLOGICA SINICA-ENGLISH EDITION 86.3(2012):568-578.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。