新疆阿尔泰山南缘克兰盆地沉积构造演化与铅锌成矿  

SEDIMENT-STRUCTURAL EVOLUTION AND LEAD-ZINC MINERALIZATION IN THE DEVONIAN VOLCANO-SEDIMENTARY KELAN BASIN IN SOUTHERN ALTAY, XINJIANG

作　　者：尹意求[1] 杨有明 李嘉兴 郭正林 郭旭吉 

机构地区：[1]桂林矿产地质研究院,广西桂林541004 [2]新疆有色地质勘查局,新疆乌鲁木齐830000 [3]新疆有色地质勘查局706队,新疆阿勒泰836500

出　　处：《大地构造与成矿学》2005年第4期475-481,共7页Geotectonica et Metallogenia

基　　金：国家305项目["十五"重点科技攻关项目(2001BA609A-07)];新疆维吾尔自治区资源补偿费项目(编号:2003005);广西培养新世纪学术和技术带头人专项资金项目(编号:2002204)共同资助.

摘　　要：位于西伯利亚板块阿尔泰大陆边缘的克兰泥盆纪火山沉积盆地具有明显的非对称性,其沉积构造演化经历了三个阶段:早期酸性火山-沉积阶段、中期基性火山-沉积阶段、晚期碎屑沉积阶段。盆地构造演化的各阶段都伴随着特定的成矿作用,形成了相应的矿床类型。在早期酸性火山-沉积阶段,主要表现为英安质-流纹质酸性火山活动及VHMS型铅锌成矿作用;在中期基性火山-沉积阶段,主要表现为玄武质基性火山喷发及SEDEX型铅锌成矿作用;在晚期碎屑沉积阶段,主要表现为陆源碎屑沉积作用,成矿作用相对甚弱。Located in the Ahay edge of the Siberia plate, the Kelan Basin is obviously an asymmetric Devonian volcano - sedimentary basin, its sediment - structural evolution may be divided into three stages ： the early acidic volcano - sedimentary stage, the middle base volcano - sedimentary stage and the late clastic sedimentary stage. Mineralization occurred in the stages of the structural evolution, resulting in the corresponding deposit types. The VHMS lead - zinc mineralization occurred in the early acidic volcano - sedimentary stage, and corresponds to the acidic volcanic eruption. The SEDEX lead - zinc mineralization occurred in the middle base volcano - sedimentary stage, and corresponds to the base volcanic eruption. The extremely poor mineralization occurred in the late clastic sedimentary stage, and corresponds to the sedimentation process of the terrigenous clastics.

关 键 词：克兰盆地 沉积构造演化 铅锌成矿作用 铁木尔特铅锌矿床 红墩铅锌矿床 阿尔泰 新疆 

分 类 号：P542[天文地球—构造地质学] P618[天文地球—地质学]