新疆库马苏地区Pb、Zn异常特征及找矿前景  

The geochemical characteristics and their prospecting potential of the lead-zinc anomaly at Kumasu district,Xinjiang

作　　者：庄道泽[1] 胡建卫[2] 程建新[2] 何永胜 杨文平[3] 

机构地区：[1]吉林大学综合信息矿产预测研究所,吉林长春130026 [2]新疆维吾尔自治区地质矿产勘查开发局,新疆乌鲁木齐830000 [3]新疆维吾尔自治区地质矿产勘查开发局第四地质大队,新疆阿勒泰836500

出　　处：《吉林大学学报（地球科学版）》2004年第2期297-303,共7页Journal of Jilin University：Earth Science Edition

基　　金：国土资源大调查项目(20001020219003)

摘　　要：新疆库马苏Pb、Zn等多元素异常集中区是全国1∶20万区域化探扫面圈定的重要的"元素含量高、分布范围大、元素组合全"异常集中区之一,具Pb、Zn、Ag、Cu、Sb等多元素的复杂组合。采用1∶5万化探和1∶2.5万土壤化探加密测量,Pb、Zn、Ag、Cu元素组合明显。异常进一步分解,主成矿元素含量大幅度提高,局部异常面积缩小。异常分布与石炭系火山碎屑岩、正常沉积岩有关,地表发现了与石英细脉有关的铅、锌、铜、金矿化,分析认为属典型的铅锌多金属矿异常。结合研究成矿地质条件、环境地球化学特征并对比研究全国部分铅锌矿综合信息找矿特征,指出了本区具有寻找大型-超大型铅、锌多金属矿的地质-地球化学条件。The Kumasu Pb, Zn anomaly concentration region is one of the most important geochemical anomaly concentration regions in China that was recognized in 1∶200 000 regional geochemical exploration for 'high anomaly contents, large area and multiple element association'. Kumasu Pb, Zn anomaly concentration region has multiple Pb, Zn, Ag, Sb, Cu anomalies and covers an area over 800 km^(2). By more detailed geochemical explorations at 1∶50 000 and 1∶25 000 scales, the associations of Pb, Zn, Ag, Sb and Cu keep unchanged, the anomalies are refined and the contents of main elements increased greatly. These anomalies are associated with the Carboniferous pyroclastic and sedimentary rocks and some quartz stringers are found with Pb, Zn, Cu and Au mineralization. Hence, the anomalies are judged to be ore-forming anomalies. Combined with the research on the ore-forming geological condition and on geochemical characteristics of the region, and comparing with those of the comprehensive information features of some large to super large lead-zinc deposits in China. It is concluded that the Kumasu Pb, Zn anomaly concentration region has favorable geologic and geochemical conditions for large and super-large lead-zinc deposits.

关 键 词：铅-锌 地球化学异常 找矿前景 新疆 

分 类 号：P618.51[天文地球—矿床学]