【摘要】 滇西澜沧江深大断裂带中北段东侧出露中生代浅变质岩系———雪山河变质岩群,其主要矿物组成为石英、黑云母和白云母。通过对其岩相学特征分析评价以及原岩恢复,提出该变质岩群为区内铜(金)矿(床)点的主要矿源层,其原岩主要为沉积岩,但可能有火山凝灰物质加入。更多还原

【Abstract】 The Xueshanhe metamorphic group, belonging to the Mesozoic lower metamorphic series, and whose major minerals are quartz, biotite and muscovite, is exposed at the eastern side of the middle-northern part of the Lancangjiang fault in western Yunnan. This paper deals with the metamorphic group in detail on the lithological character and the protolithes restored. The results showed that the metamorphic group, whose protolith is chiefly sedimentary rocks but is likely to be introduced by volcanic tuffaceous material, is the primary source-bed of copper (gold) ores in this region.更多还原