中天山乌兰莫仁构造混杂岩带的初步确立及构造意义  

Preliminary Establishment of Wulanmoren Tectonic M'ange in Central Tianshan Mountain, and its Tectonic Significance

作　　者：穆利修 李平 王哲 屈涛 凤骏 

机构地区：[1]新疆维吾尔自治区地质调查院,新疆乌鲁木齐830000

出　　处：《新疆地质》2016年第1期34-39,共6页Xinjiang Geology

基　　金：新疆巴伦台1:5万K45E006010;K45E007010;K45E007011;K45E008010;K45E008011五幅区域地质调查项目(1212011140058)资助

摘　　要：中天山巴伦台地区乌兰莫仁构造混杂带由以辉长岩、橄榄辉长岩、橄榄二辉岩、斜长花岗岩等为主的深成杂岩、以玄武岩为主的铁镁质火山岩组成,可能代表了吉尔吉斯洋盆的洋壳残片,上覆岩系主要由硅质岩、硅质粉砂岩、泥晶灰岩等远洋沉积物组成。该洋盆在早元古代可能已打开,至早—中奥陶世闭合,伊犁微地块与中天山微地块形成统一的伊犁-中天山地块。乌兰莫仁构造混杂岩的识别,对于探讨吉尔吉斯洋盆是否延伸至巴伦台地区以及巴伦台地块与伊犁地块间是否存在洋盆提供了重要依据,同时对于重新认识巴伦台微地块(中天山地块)和伊犁地块间的关系及探讨中天山地区乃至中亚造山带古生代以来构造演化具重大意义。Wulanmoren tectonic mélange consists of plutonic complex rocks,which mainly includes gabbro,olive gabbro,olive pyroxenite and plagioclase granite,and mafic volcanic rocks which are mainly composed of basalts, may represent the ocean crust fragments of Kirghizia Oceanic basin which were overlain by ocean sediment includes siliceous,siliceous siltstone,micrite and so on.The Oceanic basin may have opened in the early Proterozoic and closed in the early-middle Ordovician.Then the Ili micro-plate and Middle Tianshan micro-plate formed unite plate called Ili-Middle Tianshan Plate.The recognition of Wulanmoren tectonic m’ange provides important evidence to discuss whether the Kirghizia Oceanic basin extends to Baluntai area and existence of Tersky Oceanic basin between the Baluntai micro-plate and Middle Tianshan micro-plate.At the same time, it has important significance to rediscover the relationship between Baluntai micro-plate（Middle Tianshan block） and Ili micro-plate,and to explore tectonic evolution process of Middle Tianshan and even Central Asia Orogenic Belt since the Paleozoic.

关 键 词：中天山 乌兰莫仁 巴伦台 构造混杂岩 构造演化 

分 类 号：P588[天文地球—岩石学] P542[天文地球—地质学]