新疆南天山孔雀沟地区团山金铜矿床地质特征与找矿标志

Geological characteristics and prospecting criteria of Tuanshan Au-Cu deposit in Kongquegou area of South Tianshan in Xinjiang

新疆南天山成矿带的成矿地质条件优越,但找矿工作一直未能实现较大突破,而团山金铜矿床是自新一轮找矿突破战略行动启动以来,在新疆南天山孔雀沟地区新发现的具有中型远景的金铜矿床。在综合分析区域成矿规律及最新找矿进展的基础上,总结团山金铜矿床的地质特征、矿体展布、矿石及矿床成因特征。团山金铜矿床位于NWW向孔雀沟断裂与晚期NE向断裂的构造叠加部位,赋矿地层为上志留统孔雀沟组浅变质砂岩,矿区共发现15条矿化蚀变带,圈定13条金和金铜矿体,平均厚度为3.45 m,金平均品位为0.93 g/t,铜平均品位为0.66%。属于受断裂带控制的中—低温热液型金铜矿床。通过进一步梳理区域背景、控矿要素与地球物理、地球化学等找矿标志,认为矿区深部存在较大的金铜找矿潜力。研究成果拓展了区域内上志留统孔雀沟组的金矿找矿新空间,可为区域找矿工作提供参考。

Although the metallogenic geological conditions are superior in South Tianshan area of Xinjiang,the prospecting work has not achieved a great breakthrough.Tuanshan Au-Cu deposit was newly developed with medium potential resources in Kongquegou area of South Tianshan since new breakthroughs in critical mineral exploration were implemented.The geological environment,orebodies distribution,ore characteristics and genetic characteristics of Tuanshan Au-Cu deposit were expounded in detail on the basis of the comprehensive regional metallogenic regularity and the latest progress of ore prospecting.Tuanshan Au-Cu deposit is located in the tectonic superposition area of NWW Kongquegou faults and NE faults in late stage,and the ore-bearing strata is low-grade metamorphism sand in Kongquegou Formation of Upper Silurian.There are 15 mineralization alteration zones,and 13 ore bodies of Au and Au-Cu.The average grade of Au is 0.93 g/t,and the average grade of Cu is 0.66%,with the average thickness of 3.54 m.The genetic type belongs to a mediuin-low temperature hydrothermal gold-copper deposit,and there is a great potential for copper and gold exploration in deep through sorting out regional background,ore-controlling elements,geophysical and geochemical prospecting indicators.The research results expanded a new space for gold exploration in Kongquegou Formation of Upper Silurian and could provide some references for regional mineral exploration.