青海祁漫塔格地区三叠纪岩浆混合作用及对动力学背景的约束

The Qimantage area, located in the western section of East Kunlun Orogenic Belt, Qinghai Province, is not only a characteristic intrusive magmatic tectonic belt but also a very important poly-metallic metallogenic belt.The area was strongly developed mafic enclaves granite and mafic dyke in Triassic ,which were closely related to regional tectonic dynamics background and metallogenesis.Studies on magma mixing and emplacement mechanism have important significance for discussing on Triassic crust-mantle interaction、lithosphere evolution、magmatic and tectonic metallogenic in East Kunlun Orogenic Belt.The project places great emphasis on magma mixing and geodynamic setting, and takes Triassic mafic enclaves granite , mafic dyke and mafic pluton in Qimantage as studying object. By regional geological survey, petrography observation, mineral composition analysis, element-isotope geochemical tracing analysis and geochronology analysis, especially focused on the research of the minerals material composition and microstructure,the project aims to analyze the mechanism of magma mixing and the process and reveal the generation and evolution of regional dynamics, and then explore regional metallogenesis by crust-mantle magma mixing constraints .

青海祁漫塔格地区位于我国东昆仑造山带西段，区域强烈发育三叠纪岩浆作用，岩浆混合作用机制研究对探讨三叠纪东昆仑区域壳-幔相互作用、岩石圈演化以及岩浆-构造-成矿动力学背景等研究具有重要意义。研究项目以岩浆混合作用与动力学背景研究为主线，选择青海祁漫塔格地区三叠纪富含暗色包体的花岗岩、镁铁质岩脉/墙、镁铁质岩体为研究对象，通过开展区域野外地质调查、岩相学研究，结合地球化学和同位素年代学分析，侧重于对各混合岩浆岩中矿物特别是不平衡成因矿物的显微物质组成分、显微结构研究，分析区域三叠纪岩浆岩混合作用机理与作用过程，揭示区域壳-幔物质相互作用和地球动力学演化过程，并探讨壳幔岩浆混合作用对区域成矿作用的约束。