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青海省化隆县沙加含铜镍矿基性杂岩体地质特征及Re-Os同位素研究

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文章导航 > 西北地质 > 2012 > 45(4): 314-320

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李侃, 张照伟, 高永宝, 杜安道, 郭周平, 张江伟, 钱兵, 王亚磊, 张炳社. 青海省化隆县沙加含铜镍矿基性杂岩体地质特征及Re-Os同位素研究[J]. 西北地质, 2012, 45(4): 314-320.
引用本文: 李侃, 张照伟, 高永宝, 杜安道, 郭周平, 张江伟, 钱兵, 王亚磊, 张炳社. 青海省化隆县沙加含铜镍矿基性杂岩体地质特征及Re-Os同位素研究[J]. 西北地质, 2012, 45(4): 314-320.
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LI Kan, ZHANG Zhao-wei, GAO Yong-bao, DU An-dao, GUO Zhou-ping, ZHANG Jiang-wei, Qian Bing, WANG Ya-lei, ZHANG Bing-she. Geological Characteristics and Re-Os Isotopic Analysis of Shajia Cu-Ni Ore-Bearing Basic Complex in Hualong County, Qinghai Province[J]. Northwestern Geology, 2012, 45(4): 314-320.
Citation: LI Kan, ZHANG Zhao-wei, GAO Yong-bao, DU An-dao, GUO Zhou-ping, ZHANG Jiang-wei, Qian Bing, WANG Ya-lei, ZHANG Bing-she. Geological Characteristics and Re-Os Isotopic Analysis of Shajia Cu-Ni Ore-Bearing Basic Complex in Hualong County, Qinghai Province[J]. Northwestern Geology, 2012, 45(4): 314-320.
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青海省化隆县沙加含铜镍矿基性杂岩体地质特征及Re-Os同位素研究

  • 1.

    西安地质矿产研究所, 国土资源部岩浆作用成矿与找矿重点实验室, 陕西 西安 710054

  • 2.

    国家地质实验测试中心, 北京 100037

  • 3.

    西安地质矿产勘查开发院, 陕西 西安 710100

  • 基金项目: 国家自然科学基金(41102050);中国地质调查局地质大调查项目(1212010911032、1212011220897、121201112088、1212011120183和1212011121092)

Geological Characteristics and Re-Os Isotopic Analysis of Shajia Cu-Ni Ore-Bearing Basic Complex in Hualong County, Qinghai Province

  • 1.

    Key laboratory for the study of Focused Magmatism and Giant ore Deposits, MLR, Xi'an Institute of Geology and Mineral Resources, Xi'an 710054, China

  • 2.

    National Research Center of Geoanalysis, Beijing 100037, China

  • 3.

    Xi'an Institute of Geological and Mineral Exploration, Xi'an 710100, China

    摘要
  • 沙加岩体是化隆基性-超基性岩带中的一个含铜镍硫化物的基性杂岩体,其岩体规模较小,岩相分带弱,矿体呈透镜状产于岩体中,苏长岩为主要赋矿岩相.对其进行岩石地球化学及硫化物Re-Os同位素测试,结果表明:岩体属钙碱性、铁质系列,富集轻稀土元素,亏损Nb、Ta等高场强元素.硫化物187Os/188Os初始值为0.3469～0.4071,γOs为180～228,说明岩体遭受了显著的地壳混染作用,地壳物质加入比例大于30%.地壳混染可能在岩浆达到S饱和进而熔离出硫化物熔体的过程中起到了重要作用.
    Shajia Cu-Ni ore-bearing basic complex is one of the intrusive rocks in Hualong basic-ultrabasic rocks belt,it is small scale,weak lithological zoning.Orebody are lenticular in the intrusion,and norite is the main host rock for the Cu-Ni ores.The analysis on rock geochemistry indicate that the intrusive is calc-alkaline,iron series,rich in LREE,depleted in high field strength elements such as Nb,Ta.The analysis on the sulfide display that the initial 187Os/188Os ratios are from 0.346 9 to 0.407 1,the γOs values are from 180 to 228,which suggest that abundant crustal material was mixed with the magma,and the content of crust-derived Os was estimated to 30%.The contamination by crustal material probably played an important role in triggering the sulfide saturation and segregation.
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出版历程
收稿日期:  2012-08-20
修回日期:  2012-09-10
刊出日期:  2012-12-15

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