| 西藏蒙亚啊铅锌矿床成矿年龄及其地质意义 |
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| 引用本文： | 魏博,程顺波,庞迎春.西藏蒙亚啊铅锌矿床成矿年龄及其地质意义[J].华南地质与矿产,2010(1):14-19. |
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| 作者姓名： | 魏博 程顺波 庞迎春 |
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| 作者单位： | 1. 中国地质大学(武汉)资源学院,武汉,430074
2. 武汉地质矿产研究所,武汉,430223 |
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| 摘 要： | 本文利用LA-ICP-MS锆石U-Pb法和石英ESR法对冈底斯北带中的蒙亚啊铅锌矿床进行了年龄测定。LA-ICP-MS测试结果显示矿区的花岗斑岩结晶年龄为14.3±0.3 Ma(MSWD=2.6);矿石中与硫化物共生的石英ESR测试结果指示矿床大致形成于(10.0±1.0)Ma~(13.6±1.4)Ma。两种年龄结果比较相近,且与冈底斯巨量斑岩铜矿化时间一致。据此,蒙亚啊矿床很可能为岩浆热液交代形成的矽卡岩型矿床,为冈底斯斑岩-矽卡岩成矿系统的一部分。
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| 关 键 词： | 铅锌矿床 成矿年龄 蒙亚啊 西藏 |
The Mineralization Age of Mengyaa Lead-Zinc Deposit in Tibet and Its Geological Significance |
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| WEI Bo,CHENG Shun-bo,PANG Ying-chun.The Mineralization Age of Mengyaa Lead-Zinc Deposit in Tibet and Its Geological Significance[J].Geology and Mineral Resources of South China,2010(1):14-19. |
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| Authors: | WEI Bo CHENG Shun-bo PANG Ying-chun |
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| Institution: | 1.China University of Geosciences,Wuhan 430074,China;2.Wuhan institute of Geology and Mineral Resources,Wuhan 430223,China) |
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| Abstract: | LA-ICP-MS U-Pb dating of zircon from granite porphyry and ESR dating of quartz from galena-sphalerite ore are yielded age of 14.3±0.3 Ma（MSWD = 2.6） and（10.0±1.0 - 13.6±1.4） Ma,respectively,in Mengyaa lead-zinc deposit in the north of Gangdese metallogenic belt,Tibet.The similar of those two ages indicated that the the mineralization age of Mengyaa deposit is same to the forming time of Gangdese porphyry copper deposits,furthermore,Mengyaa is a typical skarn lead-zinc deposit as part of Gangdese porphyry-skarn ore-forming system in Miocene epoch. |
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| Keywords: | lead-zinc deposit mineralization age Mengyaa Tibet |
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