黑龙江省漠河地区1∶5万水系沉积物地球化学特征及找矿方向  

Geochemical characteristics and prospecting direction of 1∶50000 stream sediments in Mohe area,Heilongjiang Province

作　　者：王冶 董峰 张坤 梁坤 王东暄 WANG Ye;DONG Feng;ZHANG Kun;LIANG Kun;WANG Dongxuan(No.5 Geological Exploration Institute of Heilongjiang Province,Harbin 150090,Heilongjiang,China)

机构地区：[1]黑龙江省第五地质勘查院,黑龙江哈尔滨150090

出　　处：《矿产勘查》2021年第12期2374-2384,共11页Mineral Exploration

基　　金：“黑龙江省1007高地幅、1003高地幅1∶5万区域地质矿产调查”项目(HLJKD2014-08)资助。

摘　　要：黑龙江省漠河地区位于大兴安岭成矿带北侧,前人曾在此开展过1∶25万化探工作,结果显示,研究区具寻找Au、Ag、Cu、Pb、Zn、Mo等矿产潜力。为进一步明确找矿方向,对研究区开展1∶5万水系沉积物地球化学测量,利用单元素异常、因子分析确定组合异常、综合异常,对研究区水系沉积物地球化学测量数据进行评价。单元素异常显示Au、Cu、Pb、Mo元素异常规模大,强度高。因子分析将元素共分成5个组合,F1:As-Sb-Pb-Bi-Ag;F2:Hg-Cu-Ag-Zn;F3:Sn-W-Zn;F4:Mo;F5:Au。共圈定综合异常17个,其中HS-1、HS-6、HS-9、HS-12、HS-15综合异常找矿潜力巨大。综合区内典型矿床及水系沉积物异常特征,确定了本区地质地球化学找矿模型,圈定了斑岩型铜或钼、热液型铅锌找矿靶区及低温热液型金找矿靶区。Mohe area of Heilongjiang Province is located in the north side of Daxinganling metallogenic belt,where 1∶250000 geochemical exploration has been carried out before.The results show that the study area has the potential to search for Au,Ag,Cu,Pb,Zn,Mo and other minerals.In order to further clarify the prospecting direction,the geochemical survey of 1∶50000 stream sediments was carried out in the study area,and the geochemical survey data of stream sediments in the study area were evaluated by using single element anomaly,factor analysis to determine combined anomaly and comprehensive anomaly.The single element anomaly shows that the Au,Cu,Pb,Mo element anomaly has large scale and high intensity.Factor analysis divides elements into five combinations,F1: As-Sb-Pb-Bi-Ag;F2: Hg-Cu-Ag-Zn;F3: Sn-W-Zn;F4: Mo;F5: Au.A total of 17 comprehensive anomalies have been delineated,of which HS-1,HS-6,HS-9,HS-12 and HS-15 have great prospecting potential Based on the characteristics of typical deposits and stream sediment anomalies in the area,the geological geochemical prospecting model of the area is determined,and the prospecting target areas of porphyry copper or molybdenum,hydrothermal lead-zinc and low-temperature hydrothermal gold are delineated.

关 键 词：水系沉积物 因子分析 地球化学找矿模型 找矿靶区 漠河 

分 类 号：P632[天文地球—地质矿产勘探]