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位于法国比利牛斯山的Trimouns矿床是世界上最大的滑石-绿泥石矿床之一。对该矿床形成的条件及滑石和绿泥石矿石的含量已较清楚。它是由不同类型的岩石通过热液交代蚀变而形成的,主要包括白云岩蚀变为滑石为主的矿石和硅铝质岩石(云母片岩和伟晶岩)蚀变为绿泥石为主的矿石。滑石矿石显示片理化结构(滑石片岩)或压实块状结构(块滑石)。由伟晶岩蚀变而来的绿泥石矿石为呈绿色的球状矿体,而由云母片岩蚀变而来的绿泥石矿石呈块状或片理状、颜色为灰绿色和深灰色。本文对欧洲这个独一无二的滑石和绿泥石矿床的地质特征和成因进行了总结和讨论。流体包裹体研究表明成矿流体为高盐度(20 to 30％ eq.wt% NaCl)、中温(320℃)、压为为2.5 kbars。磷钇矿和独居石的U-Pb定年结果表明,成矿年代为112~97Ma,成矿作用可能持续了16Ma以上。
The Trimouns deposit in the French Pyrenees is one of the largest talc-chlorite deposits in the world. The formation of the deposit conditions and talc and chlorite ore content has been more clear. It is formed by different types of rocks through hydrothermal alteration alteration, mainly including alteration of dolomite into talc-based ores and alteration of silicalite (mica schist and pegmatite) to chlorite Ore. Talc ore shows a piece of petrified structure (talc schist) or a compacted block (talc). The chlorite mineral altered from Pegmatite is a green, spherical ore body. The chlorite minerals altered from mica schist are massive or platy, in colors of gray-green and dark gray. This article summarizes and discusses the geological features and causes of this unique talc and chlorite deposit in Europe. Fluid inclusions studies indicate that the ore-forming fluids are high salinity (20 to 30% eq. Wt% NaCl), medium temperature (320 ° C) and pressure of 2.5 kbars. The results of U-Pb dating of xenotime and monazite show that the metallogenic age is 112 ~ 97Ma and the mineralization may last more than 16Ma.