湖南曲溪金矿床成矿作用及成矿物质来源探讨

曲溪金矿床冷家溪群地层初始具有较高的含金背景值，由于变质和构造作用，易释放出金并活化迁移，在局部沉淀富集。燕山早期由于陆内俯冲碰撞挤压作用，构造热事件致使深部的冷家溪群地层重熔或同熔形成花岗岩浆。岩浆发生底侵作用,沿深大断裂上侵，在上侵过程中，深部流体混入变质水和大气降水，并萃取了冷家溪群地层中金等成矿物质，携金热液迁移至构造有利部位卸载富集成矿。曲溪金矿床成矿过程中冷家溪群地层为成矿提供了金物质来源。花岗岩不但提供金物质来源，而且为成矿提供热动力。

Discussion on the Mineralization and Material Sources of Quxi Gold Deposit in Hunan Province

Lengjiaxi strata in Quxi gold deposit with high initial gold background value,gold that is easily to be released was activated,migrated,and then precipitated,enriched in local area,due to metamorphism and tectonism.In Early Yanshanian,due to compression of the intra-continental subduction and collision,tectonic thermal event resulting in melting of diver deep or melting in the Lengjiaxi Group strata to form granite magma.Magma underplating along the deep fault intrusion,in the process of intrusion the deep fluid mixed with metamorphic water and meteoric water,and extract the mineral formation of gold in Lengjiaxi group,the hydrothermal bring gold migrate to construct favorable parts of the uninstall enrichment and mineralization.Lengjiaxi stratum provide gold material sources for the mineralization of Quxi gold deposit.While Granite not only provide the source of the gold material,but also provide thermal power for the mineralization.