关键词: 金矿带, 矿化蚀变带, 找矿标志\石泉&mdash, 汉阴北部, 南秦岭

Abstract:

The spatial distribution range of mineralization zone is larger than that of gold orebody，and it’s easier to be identified and mapped.Therefore，the study of mineralization alteration zone plays an important role in the exploration practice of gold deposits.Based on the study of the northern Shiquan-Hanyin gold belt in south Qinling，the characteristics of mineralized and altered minerals related to gold mineralization was analyzed and classified，meanwhile，combined with Au element chemical analysis and electronic probe test results， the obvious prospecting criteria of the deposit was determined.The study shows that the main prospecting indicators related to gold mineralization are as follows：①limonites which are fine aggregate，small vein or in the shape of lenticular，always distribute crookedly along the crumpled schistosity plane；②pyrites which are filiform or like a wire forming subhedral or xenomorphic aggregate，distribute along schistosity plane and develop small gentle fold or small angular fold；③quartz veins which have color of smoky grey and are in shape of lenticular or small veins，have xenomorphic granular structure and wavy extinction under the microscope；④biotite phenocrysts and garnet phenocrysts.

Key words: gold belt, mineralized alteration zone, prospecting indicator, northern Shiquan-Hanyin, south Qinling