西藏类乌齐县南越拉铅锌矿地质特征及找矿方向

Geological characteristics and prospecting direction of Nan Yuela Lead-zinc Deposit, Leiwuqi County, Tibet

西藏类乌齐县南越拉铅锌矿位于羌北地块,矿区出露地层主要为上三叠统甲丕拉组(T3j)地层岩性为砂岩、砾岩、灰岩夹泥岩。该矿床受地层、岩体以及断裂构造带的控制。其中甲丕拉组(T3j)是该矿床的含矿地层,矿体赋存于甲丕拉组(T3j)上部的碎裂白云质灰岩中。本文通过介绍区域地质背景、矿区地质特征及成矿演化,简要地分析了南越拉铅锌矿床的成因,并通过矿体岩石化学异常、物探异常特征,推测Ⅱ号矿化带以及对深部矿体进行勘探均具有较可观找矿前景。

Nan Yuela lead zinc ore located in northern t^iangtang massit in Leiwuqi County,Tibet,the layer expose in the mine lot are mainly upper Triassic Jia peila formation （T3 j）, and the lithology is sandstone, conglomerate, and mudstone which press from both sides in limestone.This deposit is mainly controlled by stratum, rock mass and fault structure zone. Jia peila formation（Taj）is the Ore formation ,the ore body contain in the upper part of （T3j）which is fragmentation dolomitic limestone. In this paper, by introduce the geological background, diggings features and metallogenic abnormal in brief, infering the second evolution, analyzing the cause of formation, and ore body petrochemistry mineralized zone and deep ore body exploration have considerable prospect.