藏北高原日土地区成矿特征及成矿远景区的初步设想

ON METALLOGENETIC CHARACTERISTICS AND METALLOGENETIC PROSPECT PROVINCE OF RITU AREA, NORTH XIZANG PLATEAU

根据对日土地区部分矿化类型解剖,阐明了该区的矿化特征严格受海西期和燕山期的构造岩浆活动带和地层岩性的控制;随成矿时代变新,外生矿产有矿种由少到多、工业意义渐增的演化趋势。在此基础上,作者初步划分了9个成矿远景区,并提出了最有利的开发利用地段。

Ritu area is rich in mineral resources. Mineral resources, specially endogenic, are controlled by structures. Besides, magmatism is closely bound up with endogenic mineral resources. There are many metallogenetic epochs of endogenic mineral resources: first is later Hercynian and early Yanshanian; second is later Yanshanian. Metallogenetic epochs of ex ogenic mineral resources are Pre-Sinian, Sinian, Permian, Triassic, Jurassic Cretaceous, Tertiary and Quaternary, but Mesozoic and Cenozoic are the most important. According to metallogenetic characteristics and mineral resources distribu- tion, nine metallogenetic prospect provinces are divided, they are: Subaishi-Silekuyan, Hongliutan, Xiongcaigangri, Yulin mountain, Zhapu-Xianqian, Ritu-Yanhu, Qiekan-Shiquanhe, Shiqanhe's south-east, Guchang. The best prospect province is Hongliutan, second is Ritu-Yanhu and Subaishi-Silekuyan.