阿尔金成矿带成矿规律与找矿预测

阿尔金成矿带介于塔里木盆地与柴达木盆地之间,呈北东向带状展布,长约600km。该带以北东向带状分布的太古宇-古生代变质地层为特征,同时在中-新生代断陷盆地中分布有弱至未变质的沉积岩。该区经历了多期造山运动和岩浆热事件,遭受了多期的抬升、走滑和变形作用。研究表明具有漫长地质演化历史的阿尔金成矿带发育类型较为齐全的金属、非金属和能源矿床,其中金、铜、铅、锌等矿种具有较好的成矿远景。区内金属矿床可划分为9个矿床类型,典型矿床如采石沟、大平沟、祥云金矿,拉配泉、索拉克、喀拉大湾铜矿床等。在对地、物、化、遥、区域成矿特征、控矿因素等资料进行综合研究基础上,采用GIS技术进行了矿产预测,将阿尔金成矿带划分为5个成矿亚带、10个找矿远景区和25个找矿预测区。

Study on Metallogenic Characteristics and Traget Areas in the Altyn Tagh Metallogenic Zone

Situated between the Tarim and Qaidam basins, the Altyn Tagh metallogenic belt stretches 600 km in NE-SW direction. The belt is mainly composed of Archean-Paleozoic metamorphic rocks and sedimentary rocks filling in the Mesozoic-Cenozoic fault-bound basins in the belt. The area has undergone multi-phased tectonic events including deformation, magmatism, tectonic uplift and strike-slip movement. Metallic, non-metallic and energy resource deposits have been developed in the belt and Au, Cu, Pb and Zn ore deposits have shown a great potential. The metallic deposits can be divided into 9 types that are represented by Au deposits in the Caishigou, Dapinggou and Xiangyun areas, and Cu deposits in the Lapeiquan, Suolake and Kaladawan areas. Based on the regional survey, geochemical and geophysical exploration, remote sensing and studies of mineralization and factors controlling the ore-forming as well as the use of GIS method, 5 metallogenic zones, 10 promising areas and 25 target areas have been determined in the belt.