喀喇昆仑甜水海——火烧云一带铅锌矿成矿条件及找矿潜力

Analysis of metallogenic condition and prospecting potential of lead-zinc deposit in Tianshuihai-Huoshaoyun area,Karakoram

甜水海—火烧云处于青藏高原西北部喀喇昆仑山主脊北侧新疆和田县境内。近年来,该区开展了大量的地质找矿工作,发现了火烧云超大型铅锌矿,乔尔天山大断裂以南一带除火烧云以外还发现了一大批铅锌矿找矿线索。通过对区内成矿地质背景、地球化学特征及已发现的矿床特征的综合研究,认为区内成矿地球化学条件优越,地质背景有利于铅锌成矿,与中侏罗统龙山组碳酸盐岩有关的喷流沉积型(SEDEX)铅锌矿、产于中侏罗统龙山组和白垩系铁隆滩组的碎屑岩-碳酸盐岩及三叠系碎屑岩的密西西比河谷型(MVT)铅锌矿找矿潜力较大,指出了研究区找矿方向,可作为今后该区铅锌矿找矿及矿产勘查工作的参考。

Tianshuihai-Huoshaoyun area,Hetian County,is located in the north of Karakoram main ridge,northwest of the QinghaiTibet Plateau. In recent years,geological prospecting in this area has seen great progress,especially in lead and zinc deposit,and Huoshaoyun super-large lead-zinc deposit was discovered. Other prospecting clues of lead-zinc deposit besides the Huoshaoyun area are shown to the south of Qiao＇ertianshan deep fault. By analyzing the metallogenic setting,geochemical characteristics,and features of deposits discovered,it is believed that the geological setting of the study area is favorable for lead and zinc mineralization,with good geochemical condition. It has great potentials for Sedimentary Exhalative（ SEDEX） lead-zinc deposit related to Middle Jurassic Longshan Formation carbonate rock,and Mississippi Valley-type（ MVT） lead-zinc deposit originating from Middle Jurassic Longshan Formation,Cretaceous Tielongtan Formation clastic-carbonate rocks,and Triassic clastic rock. The research provides a prospecting direction and reference for future lead-zinc prospecting and mineral exploration of the study area.