川西地区金矿的分类体系和优势类型

CLASSIFICATION SYSTEM AND DOMINANT TYPES OF GOLDDEPOSITS IN THE WESTERN SICHUAN

以宏观地质特征为主要依据，结合成矿作用和成矿机理，将川西地区金矿划分为９类。从金矿类型的分布，优势层位中金矿类型的分布和各类金矿的品位、吨位模式等方面的研究，确定了各类金矿的优势程度，并提出产于浅变质细碎屑岩系和蛇绿混杂岩中的地下水热液型金矿是川西地区最主要的优势类型，可望出现超大型金矿。

Based mainly on the macroscopic geological features, combined with ore forming processes and mechanisms, the gold deposits in the western Sichuan may be divided into nine types. The superior grades of nine types of gold deposits can be determined from the studies of the distribution of gold deposit type in the dominant strata, grades and tonnage models of various types. It is suggested that the underground hydrothermal type gold deposits hosted in slightly metamorphic rock series and ophiolitic mélange are the most important ones in which super large gold deposits would be found.