东准噶尔晚古生代洋陆转换过程:来自沉积学的约束  

Late Paleozoic ocean-continent conversion in eastern Junggar:constraints from sedimentology

作　　者：郑有伟 曾洋 彭传凯 李汶渝 刘翔 樊海龙 ZHENG Youwei;ZENG Yang;PENG Chuankai;LI Wenyu;LIU Xiang;FAN Hailong(Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China;Engineering Technology Institute, Sinopec Southwest Oil & Gas Company, Deyang 618000, Sichuan, China;CNPC XDEC Geological Research Institute, Karamay 834000, Xinjiang, China;Shandong Survey and Design Institute of Water Conservancy, Jinan 250013, China;Key Lab of Petroleum Resources of Northwest Institute of Eco-environment and Resources of Chinese Academy of Sciences, Lanzhou 730000, China;School of Construction Machinery, Chang'an University, Xi'an 710064, China)

机构地区：[1]内蒙古科技大学矿业与煤炭学院,内蒙古包头014010 [2]中国石油化工股份有限公司西南油气分公司石油工程技术研究院,四川德阳618000 [3]中国石油集团西部钻探工程有限公司地质研究院,新疆克拉玛依834000 [4]山东省水利勘测设计院,济南250013 [5]中国科学院西北生态环境资源研究院,甘肃省油气资源研究重点实验室,兰州730000 [6]长安大学工程机械学院,西安710064

出　　处：《地质找矿论丛》2022年第1期68-75,共8页Contributions to Geology and Mineral Resources Research

基　　金：内蒙古自然科学基金项目(编号:2018LH04001);昆都仑区科技计划项目(编号:YF2020015)联合资助。

摘　　要：东准噶尔卡拉麦里造山带是中亚造山带西段一个很重要的构造单元,其构造演化为区域构造过程、动力机制等问题的研究提供关键证据,也为研究中亚造山带提供了重要的物质基础和理论依据。本文在前人研究的基础上,通过对卡拉麦里造山带野外剖面实测、构造现象描述、典型岩石观察,选取典型复理石、磨拉石建造剖面及古生物化石开展系统研究,结果表明:①白碱沟—红尖山卡拉麦里组复理石建造为巨厚的海相地层,是碰撞前的产物;②双井子地区松卡尔苏组顶部发育磨拉石建造,是造山后快速堆积的产物,基本代表了区内碰撞作用的开始,巴塔玛依内山组火山岩的形成时间晚于磨拉石盆地的形成时间;③卡拉麦里地区洋陆转换时间为343.5 Ma—339.0 Ma±,之后随着板片断离和俯冲板块后撤,区内进入后碰撞演化阶段。The Kalamaili orogenic belt is a very important tectonic unit in the western part of the central Asian orogenic belt.Based on the previous studies it's tectonic evolution,regional tectonic process,dynamic mechanism and sedimentology are systematically studied in this paper.Sections were measured,structural phenomenon described,typical flysch,molasse sections of Kalamaili formation and paleontological fossils were dealt with detailly.The results show that the tremendous thick flysch formation of Kalamaili formation in Baijiangou-Hongjianshan area is marine strata of the pre-collision sediments,the molasse formation on top of Songkalsu formation in Shuangjingzi area is post-orogenic product of rapid sedimentation representing beginning of collision of the area,volcanic rock of the Batamayinnei shan formation was formed later than the molasse basin combined with the chronological dats,the ocean-continent conversion took place about 343.5 Ma-339.0 Ma ago then the subduction retreated with separation of the plate slice.

关 键 词：洋陆转换 沉积学 磨拉石建造 复理石建造 卡拉麦里 东准噶尔 

分 类 号：P534.4[天文地球—古生物学与地层学] P588.2[天文地球—地质学]