摘要
云南大理笔架山金矿区地处宾川—程海深大断裂与金沙江—红河断裂所夹持的倒三角地带,矿区的围岩蚀变主要与这一地区喜马拉雅期富碱侵入体有关,在富碱性的斑岩体接触带形成强烈的矽卡岩化和角岩化,并伴随有明显的铜、钼、金等多金属矿化。因此矽卡岩化、角岩化既有利于成矿,也是直接的找矿标志。
Bijiashan Au orefield in Yunnan Dali is in the reverse triangular area between Binchuan-Chenghai macrofault and Jinshajiang-Honghe fault. The wall rock alteration of orefield is mainly in relation to Himalayan alkali-rich intrusion. The intense skarnization,hornfelzation and the accompaniment multimetallic metallogenesis of Cu,Mo,Au,etc are formed in the contact of alkali-rich porphyry body. Therefore,the skarnization and hornfelzation are advantageous to the metallogenesis and also the direct prospecting criteria.
出处
《云南地质》
2017年第1期87-90,共4页
Yunnan Geology
关键词
富碱性斑岩
矽卡岩化
角岩化
云南大理笔架山
Alkali-Rich Porphyry
Skarnization
Hornfelzation
Bijiashan
Dali
Yunnan
