新疆西天山哈勒尕提-木祖克铁铜铅锌矿床地质特征及成矿条件分析

哈勒尕提-木祖克铁铜铅锌矿床是近年来在新疆西天山博罗科努成矿带内发现的一处典型的矽卡岩型铜多金属矿床,目前为中型规模,有达到大型矿床的潜力。矿体赋存于大瓦布拉克岩体与上奥陶统呼独克达坂组(O3h)大理岩、大理岩化灰岩的接触带。成矿受岩浆岩、地层岩性和接触带构造"三位一体"联合控制。大瓦布拉克岩体主要岩性为二长花岗岩和花岗闪长岩,岩石地球化学显示高硅、准铝、低镁、富碱、富钾,为I型花岗岩,富集大离子亲石元素,相对亏损高场强元素,具俯冲带岩浆岩的地球化学特点。呼独克达坂组(O3h)碳酸盐岩地球化学性质活泼且富含铜、锌,有利于含矿热液交代成矿,是区域找矿的优势层位。接触带构造既是成矿地球化学障,又是良好的成矿热液运移通道,直接控制着矿体的产出。

Geological features and ore-forming conditions of the Halegati-Muzuke Fe-Cu-Pb-Zn deposit in West Tianshan Mountains, Xinjiang

Located in the Boluoke''nu metallogenic belt of the West Tianshan Mountains in Xinjiang, the newly discovered Halegati-Muzuke Fe-Cu-Pb-Zn deposit is a medium-sized skarn deposit, and may potentially become a large one. The orebodies occur at the contact zone between Dawabulake pluton and marble, marbleized limestone of the Upper Ordovician Hudukedaban Formation. Orebodies are controlled in trinity by the pluton, strata and structure of the contact zone. Dawabulake pluton consists mainly of monzogranite and granodiorite, and is rich in Si, Al, K, Na, LILE, and poor in Mg, HFSE. The pluton is I-type granite and has the magma characteris- tics of subduction zone. The carbonates of Hudukedaban Formation(O₃h)are rich in Cu and Zn, which is favorable for mineralization through hydrothermal metasomatism, and hence this horizon is likely to become a favorable formation for regional prospecting. As a geochemical barrier and a pathway of hydrothermal fluids, the structure of contact zone controls the skarn orebodies.