围岩蚀变在斑岩型铜矿找矿中的应用

Wall rock alteration in the porphyry copper ore prospecting application

斑岩型铜矿有其独特的蚀变和分带,由于蚀变围岩常比矿体大,并较易寻找和圈定,且斑岩铜矿的一定蚀变组合与矿化类型有密切的关系,故围岩蚀变长期以来都是一种直接的找矿标志。通过云南中甸地区2个斑岩铜矿围岩蚀变特征的对比分析,本文总结出斑岩铜矿床的围岩蚀变特征及其在找矿中的指示作用。研究表明,绢英岩化或钾硅化为高温蚀变带,是直接找矿标志,青磐岩化为低温蚀变带,是间接找矿标志。

The porphyry type has its own unique alteration and zoning, due to the altered rock ore often than high, and is easy to find and locate and porphyry copper deposit, certain alteration assemblages and mineralization types are closely related, so the wall rock alteration has been a direct prospecting indicator. The Yunnan Zhongdian area 2porphyry copper wall rock alteration characteristics of the comparative analysis, summarizes the porphyry copper deposit characteristics of wall rock alteration and its prospecting indicator. Research shows, silk of British rock or potassium silicate for high temperature alteration zone, is the direct prospecting signs, propylitization for low temperature alteration zone, is indirect prospecting marks.