内蒙古额济纳旗标山北土壤地球化学异常特征及找矿前景  

Characteristics of Soil Geochemical Anomalies and Ore-Search Prospect in the North of Biaoshan,Ejinaqi,Inner Mongolia

作　　者：李超 罗先熔 汤国栋 邱炜[2] 商振城 张文博 唐瑞 孙港归 LI Chao;LUO Xianrong;TANG Guodong;QIU Wei;SHANG Zhencheng;ZHANG Wenbo;TANG Rui;SUN Ganggui(Guilin University of Technology,College of Earth Science,Institute of Concealed Mine Prospecting,Guilin,Guangxi 541004;Qinghai Institute of Geological Survey,Xining,Qinghai 810012)

机构地区：[1]桂林理工大学地球科学学院隐伏矿床预测研究所,广西桂林541004 [2]青海省地质调查院,青海西宁810012

出　　处：《地质与勘探》2020年第6期1170-1182,共13页Geology and Exploration

基　　金：国家重点研发计划(深部铀成矿信息识别技术研究,编号:2017YFC0602604HT02);国家重点研发计划项目(穿透性地球化学勘查技术,编号:2016YFC0600603);青海省科学技术厅应用基础研究计划项目(编号:2018-ZJ-779)联合资助。

摘　　要：为优选内蒙古标山北找矿靶区,在了解该区地质特征的基础上进行了1∶10000土壤地球化学测量工作。通过对Cu、Zn、Co、Ti、Cr、Ni、As、Sb、Sn、W共10种元素含量特征(变异系数、浓集系数等)统计,显示Cu、Cr、W元素为区内成矿有利元素。运用统计学软件SPSS25对10种元素数据进行R型系统聚类分析和R型因子分析,共划分出Cu-Zn-Co-Ti、Cr-Ni、As-Sb、Sn-W四组成矿元素组合。采用衬度异常法计算各元素和元素组合的异常下限,运用Surfer15软件将成矿有利元素和元素组合衬度数据处理成图,共圈定3个预测靶区。对Ⅱ号靶区14号铜矿化体进行探槽工程验证,发现两条较好的工业铜矿体,同时对12号、14号铜矿点以及13号赤铁矿矿点附近取样分析,显示铜、全铁(TFe)品位均达到了矿体品位,表明标山北地区具有较好的铜铁成矿潜力。The purpose of this work was to optimize the prospecting target area in the north of Biaoshan,Ejinaqi,Inner Mongolia.A soil geochemical survey of 1∶10000 was conducted based on understanding the geological characteristics of this area.Statistics of the content features of 10 elements(variation coefficient,concentration coefficient,etc.)of Cu,Zn,Co,Ti,Cr,Ni,As,Sb,Sn,and W show that Cu,Cr,and W are favorable elements for mineralization in the area.The statistical SPSS25 software was used to examine the data of the 10 elements by R-type systematic cluster and R-type factor analysis,and four mineral element combinations of Cu-Zn-Co-Ti,Cr-Ni,As-Sb,and Sn-W were determined.The anomaly lower limit of each element and element association were calculated by the contrast value anomaly method,and the contrast data of favorable elements and element combinations were processed into maps by the Surfer15 software,and three prediction targets were delineated.Trenching verification at the No.14 copper mineralization body in the No.II target area revealed two good industrial copper orebodies.At the same time,the samples near the No.12 and No.14 copper ore occurrence,and No.13 hematite ore occurrence show that the copper and total iron(TFe)grade reach the standard of the orebody,indicating that there is a good copper-iron metallogenic potential in the north of Biaoshan.

关 键 词：土壤地球化学特征 衬度异常法 找矿前景 标山北 额济纳旗 内蒙古 

分 类 号：P632.1[天文地球—地质矿产勘探]