新疆博格达构造带的构造属性及造山机制  

Structural Characteristic and Orogenic Mechanism of Bogeda Tectonic Belt,Xinjiang

作　　者：郑勇[1] 孙文[1] 郭新成[1] 梁婷[2] 高景刚[2] 周汝宏[3] 

机构地区：[1]新疆维吾尔自治区地质矿产勘查开发局第十一地质大队,新疆昌吉810011 [2]长安大学地球科学与资源学院西部矿产资源与地质工程教育部重点实验室,陕西西安710054 [3]新疆维吾尔自治区地质矿产勘查开发局,新疆乌鲁木齐810000

出　　处：《东华理工大学学报（自然科学版）》2014年第2期199-206,共8页Journal of East China University of Technology(Natural Science)

基　　金：中国地质调查局项目"我国典型三稀金属矿床研究与靶区优选"(12120113078200);新疆维吾尔自治区地质矿产调查项目"新疆色皮口地区1:5万矿产地质调查"(XJQDZ2003-24)

摘　　要：新疆博格达山东段石炭系火山岩发育。本文通过对该地区石炭系火山岩分布和岩石组成特征的调研,结合以往对该区火山岩地球化学研究,对博格达构造带的构造属性和造山机制进行了探讨,提出博格达构造带具有坳拉谷的基本特征,即具有一端连接大洋(哈尔里克)、一端伸向和尖灭于陆块(准噶尔地块)内,拉张阶段堆积裂谷型双峰式火山岩建造,造山阶段没有俯冲而直接抬升,造山末期有巨量辉绿岩泄出,表明地幔柱在博格达坳拉谷发生和发展过程中的主导作用。Carboniferous volcanic rocks are widely distributed in the eastern area of Bageda Mountain.Though the research on distribute and composition characteristics,combining with the geochemistry of Carboniferous volcanic rocks,the structural characteristic and organic mechanism on Bageda tectonic belt is discussed in this paper.The result shows that Bageda tectonic belt has aulacogen feature.Its one of end connects with the ocean （Hal Rick）,and another extends and pinch out to continental （Junggar block） ; the bimodal volcanic construction of rift type is stacked in the period of extension stage,and no subduction and dirct uplift happen in the period of organic stage.The end of orogenic stage have massive diabase rads,all this indicate that the mantle plume play the leading role in the formation and development of aulacogen.

关 键 词：石炭系火山岩 构造属性 造山机制 博格达构造带 

分 类 号：P618.4[天文地球—矿床学] P578.12[天文地球—地质学]