塔里木盆地早-中二叠世岩浆作用过程及地球动力学意义

通过对塔里木盆地早-中二叠世基性岩类的做量元素、稀土元素和沉积特征的分析．提出了盆地早-中二叠世基性岩类的物质来源和岩浆作用的深部地质过程认勾基性岩浆来自于均一的富集地幔．并经历了较强的分异作用。深部岩浆向地表上升迁移过程中,导致了上部岩石圈的快速隆升．并造成塔里木盆地的区域性抬升和海水向西退出．并进入陆相碎屑岩沉积阶段。当隆升的作用力超过了岩石圈的扰曲强度时,岩石圈发生破裂,导致了塔里木盆地大规模的岩浆作用塔里木盆地早-中二叠世的岩浆作用与古特提斯洋的演化密切相关,并与吐哈盆地、红柳河地区、北山地区、扬子板块西缘地区的二叠纪岩浆作用共同构成了古特提斯北缘一次强烈岩浆作用事件。

Geological Process of Early to Middle Permian Magmatism in Tarim Basin and Its Geodynamic Significance

Through systematical research of early to middle Permian basic igneous rocks the focus on the trace element and REE geochemistry, the deposition characteristics, the source of basic igneous rocks and the deep geological process of early to middle Permian Magmatism are put forward. The basic magma originated from homogeneous enriched mantle with relatively intense differentiation. Moving up of magma resulted in fast uplift of upper lithosphere, regional uplift and recession toward west. The lithosphere of Tarim basin was broken up and large scale magmatism occurred while the uplift force exceeded the tortuosity of lithosphere. The Early to Middle Permian magmatism was related to Paleo-Tethys evolution The magmatism in Tarim basin with the Permian magmatism happened in Tarim basin, Turpan-Hami basin and adjacent area, Hongliuhe area, Beishan area and western margin of Yangzhi plate Permian, comprised an intense nmgnmtism belt in the northern margin of PaleoTethys.