青海省德令哈市塔塔楞河南部地区地球化学特征及找矿前景

Geochemical characteristics and ore prospecting potentials in southern Tatalenghe,Delingha City,Qinghai Province

塔塔楞河南部地区位于南祁连加里东期钨、锡、金、铜成矿带南部,主体属于居洪图—石乃亥加里东期铅、锌、银、金(钨、锡、铋)成矿亚带,成矿地质条件优越。水系沉积物及土壤测量结果显示,该区金异常强度较高,异常主要分布于志留系巴龙贡噶尔组、二叠系勒门沟组—草地沟组和土尔根大坂组中,研究区内1∶5万水系沉积物HS35综合异常分带明显,异常强度高。对HS35综合异常查证时,发现金矿化点1处。通过对塔塔楞河南部地区成矿地质条件及地球化学异常综合分析,对比尕日力根金矿床,认为通过进一步勘查工作在该区有望找到金矿床。

The southern parts of Tatalenghe are located in southern tungsten,tin,gold,copper metallogenic belt of the south Qilian Caledonian period. The main body belongs to lead,zinc,silver,gold（ tungsten,tin,bismuth） ore-forming subzone of the Juhongtu-Shinaihai Caledonian period. The metallogenic geological condition is superior. Stream sediment and soil geochemical survey found gold anomalies intensity are higher in the area. The anomalies are mainly produced in the Balonggonggaer formation in the Silurian,the Lemengou formation of Permian,the Caodigou formation and the Tuergendaban formation. In the study area,the HS35 comprehensive anomaly in the 1 ∶ 50 000 stream sediments is obvious in zonation and the anomalous strength is intense. During the anomaly examination of HS35,1 gold mineralization spot was found. Through the comprehensive analysis of metallogenic geological conditions and geochemistry in southern Tatalenghe and comparison with Gariligen Gold Deposit,it is concluded that by further exploration,gold deposits are expected to be discovered.