中国阿尔泰造山带岩浆活动、构造演化及成矿作用

Magmatism,Tectonic Evolution and Mineralization in the Altai Orogen of China

通过中深变质岩及部分侵入岩同位素年代学、地球化学研究，结合前人研究成果，对阿尔泰造山带岩浆岩时空分布特征、岩浆活动与构造演化及与成矿作用的关系进行了系统研究。中国境内阿尔泰造山带岩浆活动大致可分为514~430 Ma、416~365 Ma、360~318 Ma、310~252 Ma和212~180 Ma 5个阶段，对应寒武-志留纪陆缘弧、泥盆纪俯冲-碰撞、石炭纪后碰撞、二叠纪陆内拉张及剪切和中生代陆内演化5个阶段。形成早古生代与陆缘岩浆活动有关的稀有金属、白云母矿产，与泥盆纪俯冲-碰撞岩浆活动有关的铜、铅锌、钼、金及铁矿，石炭纪与后碰撞岩浆活动有关的铜、钼、金矿，二叠纪与陆内拉张构造-岩浆活动有关的铜镍矿和金矿，中生代与岩浆活动有关的稀有、白云母及金矿等。

Through mesometamorphic and some intrusive rocks Isotope Geochronology and geochemical studies,this paper combines with the result of previous studies and conducts a systematic study on the temporal and spatial distribu- tion characteristic of igneous rocks in Altay orogenic belt,and the magmatic activity and tectonic evolution and its rela- tionship with ore formation.The magmatic activity in the Altay orogenic belt in China can be divided into 514-430 Ma, 416-365 Ma,360-318 Ma,310-252 Ma and 212-180 Ma other five phases,corresponding to Cambrian-Silurian continen- tal margin arcs,Devonian subduction-collision,Carboniferous post-collision,Permian intracontinental tensile and shear and Mesozoic intracontinental evolution the five stages.And form the rare metal and muscovite minerals related to early Paleozoic continental margin magmatic activity, and copper, lead and zinc,molybdenum,gold and iron ore related to Devo- nian subduction-collision magmatic activity, and copper, molybdenum,gold related to Carboniferous post--collisional mag- matic activity,and copper-nickel ore and gold related to Permian intracontinental tensional tectonic-magmatic activity, and rare mineral muscovite and gold and so on related to Mesozoic magrnatic activities.