新疆博格达东段多金属矿带化探原生晕与激电测量相结合的找矿效果  

Prospecting Effect on Geochemical Primary Halos of Polymetallic Ore Belt in Eastern Bogda,Xinjiang Combined with Induced Polarization Survey

作　　者：玉苏普艾力.喀迪尔 陈川[1,2] 刘雷[1,2] 

机构地区：[1]新疆大学地质与矿业工程学院,新疆乌鲁木齐830047 [2]新疆大学新疆中亚造山带大陆动力学与成矿预测重点实验室,新疆乌鲁木齐830047

出　　处：《现代地质》2015年第3期713-720,共8页Geoscience

基　　金：国家"十二.五"科技支撑计划重点项目(2011BAB06B08)

摘　　要：新疆博格达东段地表岩石风化剥蚀严重,直接找矿标志不明显,以大功率激电中梯测量为辅助功能的大比例尺岩石地球化学测量方法对发现和圈定隐伏矿体起到了重要作用。研究区原生晕微量元素定量分析结果表明,Cu、Zn、Mo、As等4种元素在勘查区为强富集元素,Pb、Sn、Co、Ba为富集元素,单元素具有水平分带性。根据化探原生晕元素组合特点及空间分布特征,以单元素异常下限值和陆壳克拉克值为划分标准,圈定了4个Ⅲ级化探异常带,异常评价初步认为Cu-Pb-Zn-Mo-As-Sn-Co-Ba-Fe-Ni-Hg多元素叠加异常区为找矿有利区。选择元素共生组合特点较明显的三个异常带开展大功率激电工作并进行化探异常的验证,最后在推断出的成矿有利部位布设钻孔并见矿。初步认为预测区成矿地质条件有利于形成黄铁矿型铜矿床。The surface of eastern Bogda in Xinjiang is heavily covered,and the rock weathering and erosion is serious,so the direct prospecting signs are not obvious. The large-scale geochemical measurement method played a significant role in the discovery and delineation of concealed ore bodies combined with the auxiliary function method of high-gradient induced polarization measurement. The quantitative analysis of trace elements in the study area showed that Cu,Zn,Mo and As elements are relatively extra enriched,and Pb,Sn,Co and Ba elements are enriched,and the single element has horizontal zonation. According to the characteristics of elements combination and spatial distribution of geochemical primary halos,it would be delineated four Ⅲ-grade geochemical anomaly areas by the criteria of single-element anomalies’ lower limit and continental crust Clark value. The anomaly evaluation indicates that Cu-Pb-Zn-Mo-As-Sn-Co-Ba-Fe-Ni-Hg multi-element superimposed anomaly form is favorable for prospecting. According to the results of geochemical,geophysical induced polarization and drilling data,the predicting preliminary reveals that the geological mineralization condition of this predicting area is conducive to the formation of pyrite-type copper deposits,and further exploration could be done in the other anomalous areas to prospect small-size copper deposits.

关 键 词：博格达 原生晕 激电异常 隐伏矿体 

分 类 号：P631[天文地球—地质矿产勘探]