西藏山南错那县吉松铅矿床地质特征及成因探讨

吉松铅矿床位于喜马拉雅板片拉轨岗日陆隆壳片南部,属拉轨岗日成矿带。三年来的勘查成果显示,该矿床成矿地质条件较好,北东向断裂带及其次级断裂为主要的导矿和容矿构造,强蚀变中基性岩脉与炭质板岩的外接触带部位,特别是硅化和绿帘石化地带是矿体有利的富集部位,围岩蚀变强弱与矿化有着密切关系,矿床为硅化破碎带中低温热液交代型矿床,具有较好的找矿前景。

Geological characteristics and genesis discussion of Jisong Lead deposit in Shannan area, Cona County,Tibet

Jisong lead deposit in Shannan area, Cona County, Tibet, is located in the south of the crustal block of Lhagoi Kangri continental apron of Himalayan plate, belonging to the Lhagoi Kangri metallogenic belt. The exploration results during the past 3 years show that the ore-forming geological conditions of the deposit are relatively favourable. The NE-trending fault and its secondary faults are the major ore-transmitting and ore-hosting structures. The external contact zone between strongly altered intermediate-basic dykes and carbonaceous slates, especially those silicification and epidotization zones, are conducive to the enrichment of ore bodies, the intensity of wail-rock alteration are closely related to the mineralization intensity. It is suggested that the deposit is a middle-low temperature hydrothermal metasomatic deposit occurred mainly in the silicified fracture zones and shows fine prospects for ore prospecting of the deposit.