| 汤不拉含矿斑岩的形成时代及其对斑岩钼铜矿的制约 |
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| 引用本文： | 夏抱本,夏斌,王保弟,李建峰,张兴国,王英超.汤不拉含矿斑岩的形成时代及其对斑岩钼铜矿的制约[J].大地构造与成矿学,2010,34(2). |
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| 作者姓名： | 夏抱本 夏斌 王保弟 李建峰 张兴国 王英超 |
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| 作者单位： | 西藏地勘局,区域地质调查大队,西藏,拉萨,851400;中国科学院,研究生院,北京,100049;中国科学院,广州地球化学研究所油气与资源研究中心,广东,广州,510640;西藏地勘局,区域地质调查大队,西藏,拉萨,851400;中海油能源发展股份有限公司,湛江南海西部研究院,广东,湛江,524057 |
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| 摘 要： | 对汤不拉钼铜矿床斑岩体进行了LA-ICPMS锆石U-Pb同位素定年,获得其成岩年龄为(19.88±0.38)Ma,表明斑岩体与矿化的形成时间一致,为中新世中期;含矿斑岩元素地球化学特征表明,其与冈底斯成矿带其它斑岩型矿床的含矿斑岩类似,具有埃达克质岩的地球化学属性,并同时具有高钾、高铝特征,与起源于俯冲洋壳熔融形成的埃达克岩构造背景不同。本文认为汤不拉含矿斑岩为新生增厚下地壳在上涌软流圈热流影响下部分熔融的产物,同时上升的埃达克质岩浆萃取源区金属元素,在后碰撞伸展构造环境下由于温度、压力的释放形成斑岩型矿床。
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| 关 键 词： | 汤不拉斑岩铜矿 锆石 U-Pb同位素定年 含矿斑岩 |
Formation Time of the Tangbula Porphyry Mo-Cu Deposit: Evidence from SHRIMP Zircon U-Pb Dating of Tangbula Ore-Bearing Porphyries |
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| XIA Baoben,XIA Bin,WANG Baodi,LI Jianfeng,ZHANG Xingguo,WANG Yingchao.Formation Time of the Tangbula Porphyry Mo-Cu Deposit: Evidence from SHRIMP Zircon U-Pb Dating of Tangbula Ore-Bearing Porphyries[J].Geotectonica et Metallogenia,2010,34(2). |
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| Authors: | XIA Baoben XIA Bin WANG Baodi LI Jianfeng ZHANG Xingguo WANG Yingchao |
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| Institution: | XIA Baoben1,3,XIA Bin2,WANG Baodi2,LI Jianfeng2,ZHANG Xingguo1 and WANG Yingchao4(1.Geological Survey Team of Tibetan Bureau of Geological Survey,Lhasa 851400,Tibet,China,2.Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,3.Graduate University of Chinese Academy of Sciences,Beijing 100049,4.Western South China Sea Institute of Energy Development Co.,Ltd.,CNOOC,Zhanjiang 524057,China) |
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| Abstract: | The discovery of the Tangbula porphyry Mo-Cu deposit makes the Gangdese porphyry copper belt extent to the east more than one hundred kilometers,so that it is close to a world class porphyry copper belt. The ore-bearing porphyries of the Tangbula deposit are granitic porphyry,quartz porphyry and granodioritic porphyry. The wall rocks in contact zone,porphyraceous biotite adamellites,are the major ore-hosted rocks. In this paper,zircon U-Pb dating on the Tangbula ore-porphyry is performed by LA-ICPMS dating ... |
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| Keywords: | Tangbula porphyry Mo-Cu deposit SHRIMP zircon U-Pb dating adakite ore-bearing porphyry |
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