青海温泉沟沟脑地区钒、铁铜多金属矿地质特征及找矿标志  

Geological characteristics and prospecting indicators of vanadium and iron-copper polymetallic deposits in the uppermost area of Wenquan Ravine,Qinghai

作　　者：保善东[1,2] 蔡生顺 谭运鸿 封建平 Bao Shandong;Cai Shengshun;Tan Yunhong;Feng Jianping(Qinghai Geological Survey Institute,Xining 810012,China;Key Laboratory of Geological Processes and Mineral Resources in Northern Qinghai-Tibet Plateau,Xining 810012,China)

机构地区：[1]青海省地质调查院,青海西宁810012 [2]青海省青藏高原北部地质过程与矿产资源重点实验室,青海西宁810012

出　　处：《能源与环保》2021年第6期108-113,120,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：青海省省级地质勘查基金项目(青国土资矿[2014]94号)。

摘　　要：温泉沟沟脑地区钒、铁铜多金属矿处于东昆仑南坡俯冲增生杂岩带,产于中—晚元古代万宝沟群火山岩组(Pt2-3w1)和早寒武纪沙松乌拉组(∈1s)地层中,赋矿岩石为黑色碳质板岩、蚀变硅质岩、重晶石岩中,矿体与围岩界线明显。矿体走向主要受区域地层展布和北西向区域断裂分布的控制,矿岩石主要金属矿物为磁铁矿、黄铜矿、铜蓝、赤铁矿、褐铁矿、孔雀石等。综合分析认为,具热水沉积叠加构造改造型多金属矿床特征,在碳质板岩、硅质岩、重晶石岩中,节理裂隙较为发育,具有条带状、纹层状构造,矿床成因属热水沉积叠加改造型钒、铁铜多金属矿。特定的层位、断裂构造、矿化蚀变及物化探异常等可以作为区域找矿标志。The vanadium and iron-copper polymetallic deposits in the uppermost area of Wenquan Ravine were located in the subduction accretionary complex belt on the south slope of the East Kunlun,and were produced in the mid-late Proterozoic Wanbaogou Group volcanic rock group(Pt2-3w1)and early cold the ore-bearing rocks in the Wulong Formation(∈1s)were black carbonaceous slate,altered siliceous rock,and barite rock,and the boundary between the ore body and the surrounding rock was obvious.The direction of the ore body was mainly controlled by the distribution of regional strata and the distribution of northwest-trending regional faults.The main metal minerals of the ore rocks were magnetite,chalcopyrite,copper blue,hematite,limonite,malachite,etc.Comprehensive analysis showed that it had the characteristics of a hydrothermal sedimentary superimposed structural reformation type polymetallic deposit.In carbonaceous slate,siliceous rock,and barite rock,joints and fissures were relatively developed,with striped and laminar structures,and the genesis of the deposit it belongs to a vanadium,iron and copper polymetallic mine with superimposed reformation of hot water deposition.Specific horizons,faulted structures,mineralization alterations,and geophysical and geochemical prospecting anomalies could be used as regional prospecting indicators.

关 键 词：成矿特征 找矿标志 矿床成因 铜多金属矿体 热水沉积叠加改造 

分 类 号：P618.6[天文地球—矿床学]