Geochemical Signature of Magmatic-Hydrothermal Fluids Exsolved from the Beauvoir Rare-Metal Granite (Massif Central, France): Insights from LA-ICPMS Analysis of Primary Fluid Inclusions
Geochemical Signature of Magmatic-Hydrothermal Fluids Exsolved from the Beauvoir Rare-Metal Granite (Massif Central, France): Insights from LA-ICPMS Analysis of Primary Fluid Inclusions
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DOI：
10.1155/2017/1925817
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发表时间：
2017-12
期刊：
影响因子：
1.7
通讯作者：
Matthieu Harlaux;J. Mercadier;W. Bonzi;Valentin Kremer;C. Marignac;M. Cuney
中科院分区：
文献类型：
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作者：
Matthieu Harlaux;J. Mercadier;W. Bonzi;Valentin Kremer;C. Marignac;M. Cuney
波伏娃花岗岩(法国中部山区)代表了欧洲瓦里斯卡纳带的一个例外，即过铝稀有金属花岗岩横跨早期的W网状物。后者被来自波伏瓦花岗岩的稀有金属岩浆-热液强烈叠加，导致石英-亚铁闪石脉系的大规模黄土化。本文对波伏娃花岗岩和交代岩网中石英和黄玉中的原生流体包裹体进行了全面的研究，以表征这种演化的稀有金属过铝花岗岩结晶过程中岩浆流体的地球化学组成。显微测温和拉曼光谱数据表明，最早的流体(L1)具有高温(500~600℃)、高盐度(17-28wt.%NaCleq)和富锂(100m)，并与外部流体相互作用。
The Beauvoir granite (Massif Central, France) represents an exceptional case in the European Variscan belt of a peraluminous rare-metal granite crosscutting an early W stockwork. The latter was strongly overprinted by rare-metal magmatic-hydrothermal fluids derived from the Beauvoir granite, resulting in a massive topazification of the quartz-ferberite vein system. This work presents a complete study of primary fluid inclusions hosted in quartz and topaz from the Beauvoir granite and the metasomatized stockwork, in order to characterize the geochemical composition of the magmatic fluids exsolved during the crystallization of this evolved rare-metal peraluminous granite. Microthermometric and Raman spectrometry data show that the earliest fluid (L1) is of high temperature (500 to >600°C), high salinity (17–28 wt.% NaCl eq), and Li-rich ( 100 m) and interaction with external fluids.