青海大场金矿矿集区成矿规律与找矿潜力

大场金矿矿集区位于青海省曲麻莱县麻多乡境内，地处被誉为青海省“金腰带”之称的北巴颜喀拉山金、锑成矿带中段，金资源量已突破190 t。本文在系统收集和分析整理前人的研究成果的基础上，分析总结矿了集区成矿规律，评价了区域找矿潜力。研究表明金矿体主要赋存于三叠系地层，受控于甘德—玛多深大断裂带，其中大场、扎家同哪、加给陇洼、稍日哦、扎拉依金矿体呈串珠状分布于断裂两侧，矿床类型为“中低温热液成因的构造蚀变岩型”金矿床，成矿时代为印支晚期。成矿物质主要来源于初始含矿热液，部分萃取于围岩地层。阿鹏额一、格涌尕玛考等金矿点以及各大矿体之间的覆盖区与深部具有良好的成矿潜力，为区内重要的找矿远景区。

Metallogenic Regularity and Prospecting Potential of Dachang gold Ore Concentration Area in Qinghai Province

Dachang gold ore concentration area is located in Maduo township, Qumalai County, Qinghai Province. It is located in the middle of the gold and antimony metallogenic belt in the north Mount Bayankala , whichis known as the "gold belt" in Qinghai Province. The estimated gold resource amount has exceeded 190 t.Based on the systematic collection and analysis of the previous research results, the metallogenic rules of the gold ore concentration area are analyzed and summarized to evaluate the regional ore-prospecting potential.Research shows that gold deposits mainly occur in the Triassic strata and is controlled by Gande-Maduo deep fault belt, Dachang, Zhajiatongna, Jiageilongwa, Shaorio and Zhalayi gold deposits are distributed on both sides of the fault in a beadlike manner, and the type of deposit is "middle-low temperature hydrothermal tectonic-altered rock type" gold deposit, the metallogenic epoch of the late Indosinian. The ore-forming materials are mainly derived from the initial ore-bearing hydrothermal fluid, and some of them are extracted from the surrounding rock strata. There are good metallogenic potential in the overburden area and the deep part of the gold deposits, including Apengeyiand Geyonggamakao gold point, which are important prospecting areas in this area.