吉尔吉斯斯坦Au、Cu、Pb、Zn、W、Sn矿床潜力评价——基于1∶100万地球化学数据

Potential assessment of gold,copper,lead,zinc,tungsten,and tin deposits in Kyrgyzstan based on 1∶1000000 scale geochemical data

吉尔吉斯斯坦是中亚天山金属成矿带的重要组成部分,矿产资源丰富,金属矿产种类齐全。吉尔吉斯斯坦国家尺度(1∶100万)地球化学填图覆盖了吉尔吉斯斯坦全境约19万km^(2),分析测试了69种元素,填补了吉尔吉斯斯坦国家尺度地球化学填图空白,为吉尔吉斯斯坦基础地质、矿产开发、环境保护、农业生产等多个方面研究提供了基础地球化学数据支撑。根据区域地质构造演化、地球化学背景,将研究区划分为5个构造地球化学分区。结合地质背景,通过对主要成矿元素地球化学参数统计分析认为:吉尔吉斯斯坦是Au、Cu、Pb、Sb、Sn、W、Ag等元素的有利成矿区。地球化学异常分布特征明显,北天山Au、Cu、Pb、Zn、Ag、Be、As等元素异常强度高;中天山以费尔干纳断裂为界,西部富集Au、Cu、Cr、Mo、Co,东部富集Au、W、Sn、Co、Cr、Ni;南天山西段集中分布Cu、Co、Cr、Ni、Au、As、Sb、Hg等元素,东段则以W、Sn、Bi元素组合分布为特点。分析成矿显著度,认为吉尔吉斯斯坦最具有找矿潜力的地区为中天山恰特卡尔地区,该区寻找铜、铅、金、钨的潜力巨大。其次,南天山东段撒雷贾兹地区也具有很好的找矿潜力,该区是寻找金、铜、钨、锡十分有利的地区。南天山西段和塔拉斯—纳伦地区找矿潜力也较好,是金、铜、铅、锌等多金属矿的有利找矿区。

As an important part of the Tianshan metallogenic belt in Central Asia,Kyrgyzstan boasts rich mineral resources and completely types of mineral resources.The national scale(1∶1000000)geochemical mapping of Kyrgyzstan covers an area of about 170000 km^(2) across the country and the analyses and tests of 69 elements.It has filled in the blank of national geochemical mapping in Kyrgyzstan and will provide basic geochemical data for studies on basic geology,mineral development,environmental protection,and agricultural production inthe country.According to the regional geologic and structural evolution and geochemical background,the study area is divided into five structural geochemical regions.According to the geological background and the statistical analysis of geochemical parameters of major metallogenic elements,it is considered that Kyrgyzstan is a metallogenic favorable region of Au,Cu,Pb,Sb,Sn,W,and Ag,with notably distributed geochemical anomalies.In detail,the northern Tianshan Mountain shows high anomalies of Au,Cu,Pb,Zn,Ag,Be,and As.The middle Tianshan Mountaincan be divided into the eastern and western parts with the Fergana fault as the boundary.Among them,the western part is rich in Au,Cu,Cr,Mo,and Co,while the eastern part is rich in Au,W,Sn,Co,Cr,and Ni.As for the southern Tianshan Mountain,the western part is characterized by the concentrated distribution of Cu,Co,Cr,Ni,Au,As,Sb,and Hg,while the eastern part is characterized by the distribution of W,Sn,and Bi associations.The analytical results of metallogenic significance are as follows.The Chattkar area in middle Tianshan Mountain is considered the area with the highest prospecting potential in Kyrgyzstan.It has enormous potential for the prospecting of Cu,Pb,Au,and W.It is followed by the Zarejaz area in the eastern part of the southern Tianshan Mountain,which also has great prospecting potential and is highly favorable forthe prospecting of Au,CU,W,and Sn.Besides,the western part of the southern Tianshan Mountain and the Talas-Narun area also enjoygood prospecting potential and are prospecting favorable areas of gold,copper,lead,and zinc polymetallic deposits.