江西中部徐山钨铜矿床单颗粒白云母Rb-Sr等时线定年及其地质意义

李光来; 华仁民; 韦星林; 王旭东; 黄小娥

doi:10.3799/dqkx.2011.029

Volume 36 Issue 2

Mar. 2011

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Article Navigation > Earth Science > 2011 > 36(2): 282-288

LI Guang-lai, HUA Ren-min, WEI Xing-lin, WANG Xu-dong, HUANG Xiao-e, 2011. Rb-Sr Isochron Age of Single-Grain Muscovite in the Xushan W-Cu Deposit, Central Jiangxi, and Its Geological Significance. Earth Science, 36(2): 282-288. doi: 10.3799/dqkx.2011.029

Citation:

LI Guang-lai, HUA Ren-min, WEI Xing-lin, WANG Xu-dong, HUANG Xiao-e, 2011. Rb-Sr Isochron Age of Single-Grain Muscovite in the Xushan W-Cu Deposit, Central Jiangxi, and Its Geological Significance. Earth Science, 36(2): 282-288. doi: 10.3799/dqkx.2011.029

Citation:

LI Guang-lai, HUA Ren-min, WEI Xing-lin, WANG Xu-dong, HUANG Xiao-e, 2011. Rb-Sr Isochron Age of Single-Grain Muscovite in the Xushan W-Cu Deposit, Central Jiangxi, and Its Geological Significance. Earth Science, 36(2): 282-288. doi: 10.3799/dqkx.2011.029

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Rb-Sr Isochron Age of Single-Grain Muscovite in the Xushan W-Cu Deposit, Central Jiangxi, and Its Geological Significance

doi: 10.3799/dqkx.2011.029

1.
State Key Laboratory for Mineral Deposits Research, Nanjing University, Nanjing 210093, China
2.
Jiangxi Bureau of Nonferrous Metal Exploration, Nanchang 330001, China
3.
Donghua University of Technology, Fuzhou 344000, China

Received Date: 2010-10-28
Publish Date: 2011-03-01

Abstract

Abstract

The Xushan tungsten-copper deposit is located in the central part of Jiangxi Province. It is a trinity deposit comprising three types of ore-bodies, i.e. quartz vein type, skarn type, and granite type. Rb-Sr micro-isochron method is first applied to determining the ore-forming age by using single grain of muscovite growing at the edge of the wolframite-quartz vein type tungsten ore. Result shows that the mineralization age is 147.1±3.4 Ma, with MSWD=0.71, and the I_Sr value is 0.849±0.026. This ore-forming age is similar to those of quartz-wolframite-vein tungsten deposits in southern Jiangxi, but is much later than the ages of copper deposits in northeastern Jiangxi and slightly earlier than the ages of copper deposits in northwestern Jiangxi. The very high I_Sr value may suggest that the ore-related granite was a melting product of highly evolved and highly saturated crust material, and the ore-forming fluids have extracted the strontium of extremely high ⁸⁷Sr/⁸⁶Sr ratios from the granite through water-rock interaction. It also suggests that there was almost no contribution of mantle material during the formation of either ore-related granite or tungsten mineralization.
- muscovite,
- Rb-Sr dating,
- geochronology,
- ultra-low procedural blank,
- high I_Sr value,
- Xushan W-Cu deposit

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References(49)

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Rb-Sr Isochron Age of Single-Grain Muscovite in the Xushan W-Cu Deposit, Central Jiangxi, and Its Geological Significance

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