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| 青海“三江”北段斑岩钼铜矿带含矿斑岩地球化学、Sr-Nd-Pb同位素特征及地质意义 | |
| 引用本文： | 郝金华,陈建平,董庆吉,李玉龙,王涛,马继义.青海“三江”北段斑岩钼铜矿带含矿斑岩地球化学、Sr-Nd-Pb同位素特征及地质意义[J].岩石矿物学杂志,2011,30(3):427-437. |
| 作者姓名： | 郝金华 陈建平 董庆吉 李玉龙 王涛 马继义 |
| 作者单位： | 1. 中国地质大学,地质过程与矿产资源国家重点实验室,北京,100083;中国地质大学北京市国土资源信息开发研究重点实验室,北京,100083 2. 中国地质大学北京市国土资源信息开发研究重点实验室,北京,100083 3. 青海省地质调查院,青海,西宁,810012 |
| 基金项目： | 国家科技支撑计划子课题资助项目，中国地质调查局地质调查资助项目 |
| 摘 要： | 青海"三江"北段斑岩型钼铜成矿带地处青海南部地区,区内呈NW-SE向展布一系列新生代具钼铜矿化的岩体。通过对具有代表性的纳日贡玛、陆日格、打古贡卡含矿斑岩地球化学、Sr-Nd-Pb同位素特征的研究,表明"三江"北段含矿斑岩主要为过铝质的高钾钙碱性-钾玄岩系列;微量元素配分曲线总体呈右倾型,大离子亲石元素(LILE)富集,高场强元素(HFSE)亏损,具有较弱的Eu负异常,Sr-Nd-Pb同位素处于亏损地幔(MORB)与富集地幔的演化曲线上,被俯冲板片流体所交代的富集地幔可能为岩浆的源区。同时,"三江"北段斑岩源区同位素更向亏损地幔端员靠拢,而软流圈物质注入量的多少则导致了"三江"北段成矿带、玉龙成矿带岩石地球化学特征的差异。以纳日贡玛大型钼铜斑岩矿床为中心的青海南部"三江"北段斑岩型钼铜矿带的确立,暗示在青海南部仍然具有寻找大型斑岩型及岩浆期后热液型矿床的潜力。 |
| 关 键 词： | 元素地球化学 Sr-Nd-Pb同位素 新生代含矿斑岩 “三江”北段 青海南部 |
| 收稿时间： | 2010/12/1 0:00:00 |
| 修稿时间： | 2011/3/23 0:00:00 |
Element and Sr-Nd-Pb isotope geochemistry of ore-bearing porphyries in northern Sanjiang Mo(Cu) ore belt, Qinghai Province: implications for tectonic setting and petrogenesis |
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| HAO Jin-hu,CHEN Jian-ping,DONG Qing-ji,LI Yu-long,WANG Tao and MA Ji-yi.Element and Sr-Nd-Pb isotope geochemistry of ore-bearing porphyries in northern Sanjiang Mo(Cu) ore belt, Qinghai Province: implications for tectonic setting and petrogenesis[J].Acta Petrologica Et Mineralogica,2011,30(3):427-437. | |
| Authors: | HAO Jin-hu CHEN Jian-ping DONG Qing-ji LI Yu-long WANG Tao and MA Ji-yi |
| Institution: | HAO Jin-hua1,2,CHEN Jian-ping1,DONG Qing-ji2,LI Yu-long3,WANG Tao3 and MA Ji-yi1,2(1.State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China,2.Key Laboratory of Beijing Land Resources Information Development,3.Qinghai Geological Survey Institute,Xining 810012,China) |
| Abstract: | The northern Sanjiang porphyry Mo(-Cu) ore belt is located in the southern Qinghai Province,where a series of NE-SE trending Cenozoic Mo-Cu mineralized rock bodies occur.In recent years,lots of large-size porphyry-skarn Mo(Cu) oren deposits,such as the Narigongma porphyry-type Mo(-Cu) deposit and the Lurige and Dagugongka porphyry-skarn-type Mo(-Cu) lead-zinc deposits have been discovered.Based on analyzing petrologic characteristics of element geochemical data and Sr-Nd-Pb istopic data of representative po... |
| Keywords: | element geochemistry Sr-Nd-Pb isotope Cenozoic porphyries northern Sanjing southern Qinghai |
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