本申请拟对西南天山木扎尔特河地区低压高温变质带的混合岩及伴生的含石榴子石淡色花岗岩，进行系统的岩石学、元素地球化学、同位素地球化学及锆石年代学综合研究。（1）对混合岩化泥质岩、斜长角闪岩及淡色花岗岩进行详细的锆石年代学研究，确定变泥质岩的变质年龄、混合岩中的浅色体以及淡色花岗岩的结晶年龄。（2）对泥质混合岩详细的矿物成分和结构分析，并使用Thermocalc 和Domino 软件计算P-T、T-X 和P-X 视剖面图，确定其峰期变质条件和P-T 演化轨迹。（3）通过详细的锆石年代学和Hf 同位素地球化学以及全岩主微量元素和同位素地球化学研究，结合相平衡模拟泥质岩变质峰期熔体成分，确定泥质混合岩和淡色花岗岩之间的关系。在这三个方面研究的基础上，可以综合确定此区域内.低压高温变质带的变质演化历史和深熔作用特征，完善西南天山造山带构造演化框架，进而探讨俯冲碰撞造山带深熔作用的控制因素和地球动力学过程。

A combined study of petrology, zircon U-Pb ages and Lu-Hf isotopes, whole-rock elements and Sr-Nd isotopes will be carried out for migmatites.(pelite and amphibolite) and garnet-bearing leucogranites, particularly pelitic migmatite, within the LP/HT metamorphic belt at Muzhaerte River, Southwest Tianshan. Zircon U-Pb dating will confirm the metamorphic age of metapelite, and crystallization ages for leucogranites, and leucosomes in migmatites. Peak metamorphic condition and P-T path for metapelite will be obtained by careful analysis of mineral compositions and textures, and phase diagram calculations (P-T, T-X and P-X pseudosections) with thermodynamic softwares of Thermocalc and Domino. The relationship between pelitic migmatite and leucogranites will be revealed by zircon U-Pb dating and Hf isotopes, and whole-rock elements and Sr-Nd isotopes, together with the modeled melt composition of metapelite at peak metamorphic conditions by thermodynamic softwares. All these will help to determine the metamorphic evolution and characteristic features of anatexis within the LP/HT.metamorphic belt of Southwest Tianshan, and shed light on the tectonic evolution of Southwest Tianshan Orogen. And then the possible causes of anatexis, and geodynamic process in the subduction-collision orogen will be discussed in the context of above results.