新疆哈尔里克地区侵入岩浆构造序列确定及构造意义

Determination of Invasive Magma Tectonic Sequence and Its Tectonic Significance in Harlik Area,Xinjiang

通过对哈尔里克山地区侵入岩类岩性岩相、岩石地球化学、同位素年代学分析，确定研究区存在奥陶-志留纪（425-460Ma）、泥盆纪（360~415Ma）、石炭-二叠纪（270-335Ma）3期岩浆侵入事件。利用0’Connor标准矿物分类系统，确定泥盆纪发育英云闪长岩-奥长花岗岩-花岗岩（T1T2G2）岩石组合，石炭纪发育石英闪长岩-花岗岩（G1G2）岩石组合。岩石组合极性显示俯冲带在南侧，即研究区南侧存在泥盆-石炭纪向北俯冲的洋盆。认为花岗质岩浆形成于洋壳向陆壳俯冲消减带中，其源岩主体来源于洋壳，并受陆源物质混染。

Through the analysis of Harlik area＇s lithology,rock geochemistry and geochronology isotope,to determine three intrusive magmatic events,includes Ordovician-Silurian（425-460 Ma）,Devonian（360-415 Ma）,Carboniferous and Permian （270-335 Ma）.The use of standard classification system for TTG rock mineral identification,The results show that in the Devonian exist tonalite-trondhjemite-granite combination（T1T2G2） and in the Devonian Carboniferous exist diorite-granite combinations（G1G2）,the rock assemblage polarity of subduction zone in the south side of the study area.The results show that granitic magma formed in the environment of ocean-continent subduction zone,it＇s source rock mainly from oceanic crust and contaminated by continental crust.