浅成低温热液型金矿研究综述

A review of research on epithermal gold deposits

浅成低温热液型金矿是重要的金矿类型,近年来对该类矿床的地球化学特征、成矿岩浆背景、成矿机理及成矿模式等方面的研究取得了重大进展。研究表明,该类矿床形成时代主要是中、新生代,其次为晚古生代;高硫化型矿床主要形成于挤压应力场环境和流体混合导致成矿物质沉淀,而低硫化型矿床主要产于张性或中性环境下由于流体的沸腾使得成矿物质沉淀;蒸气冷却收缩模式合理地解释了浅成低温热液矿床和斑岩矿床在时间和空间上的共生关系,对指导找矿具有一定的实践意义。

The epithermal gold deposit is one of the most important types of gold deposit. Significant ad- vances have been made in the latest decades, including the geochemical characteristics, the relationship with intrusive rocks, the metallogenesis and metallogenic model. The researches indicate that this type of deposit is mainly formed in Mesozoic and Cenozoic. Next to the two eras is Late Paleozoic. The high sul phidation gold deposit is mainly resulted from the fluid mixing under the compressional stress regime while the low sulphidation gold deposit from the boiling under the extensional stress regime. Cooling and contracting model can explain reasonably the temporal and spatial association of the epithermal Au deposit and porphyry copper gold deposit thus is of guiding significance for future prospecting.