新疆阿尔泰麦兹盆地沉积矿床地质特征与找矿方向

麦兹晚古生代火山盆地位于西伯利亚板块阿尔泰陆缘活动带东段,盆地中赋存有丰富的铅锌、铜铁等多金属矿产,其中可可塔勒大型铅锌矿、蒙库大型铁矿床、阿克哈仁铅锌矿、大桥铅锌矿等具有代表性,各类矿床表现出海底火山喷气沉积成矿的特征.麦兹盆地多金属矿床具有明显的规律性,铁矿主要分布于盆地北侧下泥盆统康布铁堡组下亚组,铅锌矿主要分布于盆地南侧下泥盆统康布铁堡组上亚组.今后应注意在蒙库铁矿区及外围寻找铜矿,在盆地中部的阿尔泰镇组沉积岩区寻找红墩式(沉积)铅锌矿,同时加强可可塔勒铅锌矿带西段和深部的勘查工作.

GEOLOGICAL FEATURES OF SEDIMENTARY DEPOSITS IN MAIZI BASIN IN SOUTHERN ALTAY MOUNTAINS AND THE EXPLORING DIRECTION

The Maizi Paleozoic volcanic-sedimentary basin is located in eastern mobile belt of Altay continental margin of Siberian plate.A large number of lead, zinc,and iron deposits,such as Keketale,Mengku,Akeharen and Daqiao deposit, were formed in the Maizi basin.These deposits are characterized by volcano-sedimentary exhalation mineralization.The iron and lead-zinc deposits occur mainly in northern and southern part of the Maizi basin,respectively.The paper presents further exploring directions for metal deposits: copper ore in the Mengku iron district and its surroundings,Sedex-type lead-zinc deposits in sedimentary rocks of Altay Town Formation,and more exploration should be done in the west section and depth of the Keketale lead-zinc ore belt.