阿尔金成矿带的归属及成矿特征

合理划分成矿区带对矿产资源预测评价和勘查具有指导价值,而正确认识构造单元性质和成矿时期的构造环境是成矿带划分的重要前提。本文从地质建造、地球物理、卫星遥感等多角度全面分析了阿尔金山的内部组成及其边界断裂特征,认为阿尔金山原属于南塔里木地块的组成部分,阿尔金造山带是在古老地块基础上活化以后形成的特殊造山带,其特点明显不同于秦祁昆造山系,阿尔金成矿带应划归塔里木成矿省。阿尔金成矿带可进一步划分为三个次级成矿单元:红柳沟-喀腊大湾(裂谷)成矿亚带主要形成海相火山岩型铅锌矿、火山-沉积变质型铁矿;阿尔金(陆缘地块)成矿亚带主要形成石棉矿和玉石矿;迪木那里克-苏巴里克(裂陷槽)成矿亚带则以沉积变质型铁矿和石棉矿为主。

Ascription and Metallogenic Characteristics of Altyn Orogenic Belt

The establishment of metallogenic belt is important in mineral resource prospecting, which depends mainly on knowledge of the geotectonic unit and tectonic setting during mineralization period. A comprehensive analysis on the characteristics for the internal components and boundary faults of the Altyn Mountain based on geological formation, geophysical and satellite remote sensing indicate that the Altyn Mountain originally belongs to the southern of the Tarim Block. Altyn orogenic belt is a special orogenic belt resulted from activation of old block basement. The Altyn orogenic belt should be ascribed to be part of the Tarim metallogenic province, because its characteristics are obviously different from Qinling?Qilian?Kunlun orogenic belts. The Altyn metallogenic belt can be further divided into three second-order metallogenic belts. The Hongliugou?Kaladawan (rift) sub-belt mainly form marine volcanic rock type of lead-zinc mine and volcano sedimentary-metamorphic type iron ores; The Altyn sub-belt (continental margin block) mainly consists of asbestos deposit and jade mine, while the Dimunakeli-Subakeli sub-belt (rift trough) mainly composed of sedimentary-metamorphic type iron ores and asbestos deposits.