方家坝地区地质地球化学特征及找矿前景分析

Geological and Geochemical Features and Prospecting in Fangjiaba Area

方家坝地区位于扬子地台西北缘增生地体"勉略阳三角地区"东部,北部北西西向构造线和南部北东东向构造线交汇部位,是三角形构造格局应力集中区,次级构造较为发育。通过区内地层、构造、岩浆岩、矿化特征并结合地球化学特征与构造的关系综合分析,认为杨家山-苏家波-白家湾蚀变带为寻找碎裂蚀变岩型金矿有利部位,寨根、白杨湾、张家院子-拐沟一带为寻找火山岩型黄铁矿化铜多金属矿有利地段。

The Fangjiaba Area lies at the east part of Mian-Lue-Yang triangle zone of the hyperplastic body in the northwest rim of Yangzi Terrace, at the intersection of NWW tectonic line at the north and NEE tectonic line at the south, is the stress-intensive area of the triangle tectonic zone, with well-developed Secondary structure. Through comprehensive analysis of regional strata, tectonic, magmatic rocks and relation of the geochemical feature with the tectonics, it was believed that the Yangjiashan-Sujiapo alteration belt is the favorite field to prospecting for gold deposit of cracked altered rock type, while the Zhaigen-Baiyangwan-Zahangjiayuanzi-Guaigou area is the favorite place for pyritization copper polymetallic deposit of volcanic type.