辽宁闾山花岗岩地质特征及侵位机制

闾山岩体地处华北板块北缘，天山-兴蒙造山带东段，总体呈北北东方向展布.早期可能受华北板块与佳蒙板块作用，为岩体的形成提供热源与空间；后期华北板块与太平洋板块的作用，使得岩浆最终就位.在板块相互作用的情况下，早期以挤压作用为主，造山作用使得地壳先加厚，后期转化为伸展作用，在地幔热源作用下进行拆沉作用，使得地壳减薄，形成闾山变质核杂岩和东西两侧的断陷盆地.

GEOLOGIC CHARACTERISTICS AND EMPLACEMENT MECHANISM OF THE LYUSHAN GRANITE IN LIAONING PROVINCE

The Lyushan intrusive bodies are located in the east part of Tianshan-Xingan-Mongolia orogenic belt on the northern margin of the North China plate,generally trending in NNE direction.The interaction between North China plate and Jiamusi-Mongolia plate in early stage probably provides heat and space for the formation of the rock bodies.The later interaction between the North China plate and the Pacific plate makes the final emplacement of magma.In the early compression stage,the orogeny makes thickened crust.Then,the stretching process,with delamination performed by mantle heat,makes the crust thinning,forming the Lyushan metamorphic core complex and the fault basins in the east and west sides.