中亚盆地群石炭-二叠纪岩相古地理恢复及演化  

Lithofacies paleogeographic reconstruction and evolution of the Carboniferous-Permian basin group in Central Asia

作　　者：马昌明 李江海[1,2] 曹正林[3] 刘磊鑫 王盟楠 MA ChangMing;LI JiangHai;CAO ZhengLin;LIU LeiXin;WANG MengNan(Key Laboratory of Orogenic Belts and Crustal Evolution,Ministry of Education,School of Earth and Space Sciences,Peking University,Beijing 100871,China;Institute of Oil and Gas,Peking University,Beijing 100871,China;Research Institute of Petroleum Exploration and Development,Beijing 100083,China)

机构地区：[1]造山带与地壳演化教育部重点实验室,北京大学地球与空间科学学院,北京100871 [2]北京大学石油与天然气研究中心,北京100871 [3]中国石油勘探开发研究院,北京100083

出　　处：《岩石学报》2020年第11期3510-3522,共13页Acta Petrologica Sinica

基　　金：国家科技重大专项(2016ZX05033002-007)资助。

摘　　要：近十年来,尽管准噶尔盆地上古生界油气勘探不断获得突破,准噶尔周缘盆地也相继有油气显示,但北疆地区含油气盆地的宏观构造背景与中亚含油气盆地群的关系还不清楚,尤其缺少板块尺度的岩相古地理分析。因此深入分析中亚盆地群石炭-二叠系的构造-岩相古地理是十分必要的。本文充分调研中亚盆地群区域地质、油气地质资料,从中亚盆地群古板块、古地理环境分析准噶尔盆地与中亚盆地群的大地构造背景,并结合构造大剖面和岩相发育特征,对中亚盆地群石炭-二叠纪岩相古地理进行研究,研究结果表明:(1)中亚盆地群石炭-二叠系的岩相特征具有明显的东西分带性,西侧的滨里海盆地、图尔盖盆地和楚-萨雷苏盆地以碳酸盐岩发育为主要岩性特征,东侧的斋桑盆地、准噶尔盆地和三塘湖盆地以火山岩和砂泥岩为主要岩性特征;(2)石炭纪时期,中亚西侧盆地群处于低纬度,气温较高,具有较为稳定的台地环境,广泛沉积碳酸盐岩,而中亚东侧盆地群处于中-低纬度,多以岛弧相为主,沉积火山岩和碎屑岩;(3)二叠纪时期,中亚盆地群已由海相沉积转化为陆相沉积,晚二叠世,中亚盆地群整体遭受抬升剥蚀,地层缺失,普遍存在不整合特征;(4)中亚地区石炭-二叠系岩相上的湖相中心和残余洋盆可作为石炭-二叠系油气勘探的重点。In recent ten years,despite continuous breakthroughs in petroleum exploration in the Upper Paleozoic of the Junggar Basin,and oil and gas displays in the peripheral basins of the Junggar Basin,the relationship between the macro-structure background of the petroliferous basins in the northern Xinjiang region and the Central Asian petroliferous basins is still unclear,especially lack of plate-scale lithofacies palaeogeography analysis. In this study,the regional geological and petroleum geological data of the Central Asian basin group are fully investigated,and the geotectonic background of Junggar Basin and Central Asian basin group is analyzed from the paleoplate and paleogeographic environment of the Central Asian basin group,combined with the tectonic profile and lithofacies development characteristics,the lithofacies paleogeography of Carboniferous-Permian in Central Asia basin group is studied.The results show that:( 1) the lithofacies of the Carboniferous-Permian basin group in Central Asia is characterized by a east-westward zoning,i. e.,the Precaspian Basin,Turgay Basin and Chu-Sarysu Basin in the west are mainly characterized by the development of carbonate rocks,while the Zaysan Basin,Junggar Basin and Santanghu Basin in the east are dominated by volcanic rocks and sand mudstones;( 2) during the Carboniferous period,the basin group in the western side of the Central Asia was in a low latitude position,with high temperature and relatively stable platform environment,and carbonate rocks were widely developed,while the basin group on the eastern side of the Central Asia is in the middle-low latitudes,mostly dominated by island arc facies,and sedimentary volcanic and clastic rocks;( 3) during the Permian period,the Central Asian basin group has been transformed from marine sedimentary to continental sedimentary,and in the Late Permian,the Central Asian basin group as a whole suffered from lift denudation,stratigraphic absence and general unconformity;( 4) the lacustrine center and residual ocean basin in Car

关 键 词：岩相古地理 中亚地区 碳酸盐岩 火山岩 石炭纪 二叠纪 

分 类 号：P531[天文地球—古生物学与地层学]