滇东北乐红铅锌矿床地质特征及找矿远景

乐红铅锌矿自20世纪50年代以来就有多家地勘单位先后进行过普查找矿,均以"层控"观点为指导没有进展而中途下马,90年代后期,云南第一地质大队以"构控"新思路开展新一轮找矿,获得突破性进展。在研究区域成矿地质背景、矿床地质特征及控矿地质因素的基础上,认为矿床为受断裂构造控制的热液充填交代型铅锌(银)矿床,并根据控矿断裂特征及成矿地质条件,指出乐红矿区及外围具有形成大型矿床的找矿远景,应该加强该区的地质找矿工作。

GEOLOGICAL CHARACTERISTICS OF THELEHONG LEAD-ZINC DEPOSIT IN NORTHEASTERN YUNNAN AND ITS ORR-SEARCH PROSPECTS

Since the fifties of the 20th century, the Lehong lead-zinc deposit has ever been explored for orebodies by a number of Geology Parties, but its exploration had to stop halfway under the guidance of the "stratabound" theory. In the late nineties the No. 1 Geological Team of Yunnan carried out additional exploration with the "structure-control" theory as the new guidance. Reconnaissance and ore-prospecting brought about a great breakthrough. Based on the study of the regional metallogenic geological setting, the geological characteristics of the ore deposit and the geological factors controlling orebodies, the Lehong deposit is thought to be a tecto-hydrothermal filling-metasomatic type lead-zinc (silver) deposit controlled by fault structures. According to the features of ore-controlling fault features and metallogenic conditions, it is possible to find large to super-large ores inside and outside the N-W striking tectonic zones of the Lehong deposit. Geological exploration in this zone should be strengthened.