古亚洲洋的演化:来自古生物地层学方面的证据  

Evolution of the Paleo-Asian Ocean:Evidences from Paleontology and Stratigraphy

作　　者：卜建军[1] 何卫红[2] 张克信[2,3] 于洋[3] 王嘉轩 吴俊[1] Bu Jianjun;He Weihong;Zhang Kexin;Yu Yang;Wang Jiaxuan;Wu Jun(Wuhan Center of China Geological Survey,Wuhan 430205,China;School of Earth Sciences,China University of Geosciences,Wuhan 430074,China;Institute of Geological Survey,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]中国地质调查局武汉地质调查中心,湖北武汉430205 [2]中国地质大学地球科学学院,湖北武汉430074 [3]中国地质大学地质调查研究院,湖北武汉430074

出　　处：《地球科学》2020年第3期711-727,共17页Earth Science

基　　金：国家自然科学基金项目(Nos.41472004,41772107)。

摘　　要：古亚洲洋的南缘跨越我国新疆、甘肃、内蒙古、黑龙江等地.对位于中国境内的古亚洲洋构造格局及其演化的研究成果进行了详细分析和总结,并归纳出存在的主要分歧.通过分析古亚洲洋构造域地层出露情况和古生物(放射虫、腕足类和古植物)地理分布,提出了2点认识:(1)早古生代,古亚洲洋西段在中国境内的主洋盆可能位于天山地区,东段的主洋盆可能位于艾力格庙-贺根山-林西-黑河一线;晚古生代,古亚洲洋西段的主洋盆位于南天山,东段的主洋盆位于索伦-温都尔庙-西拉木伦-延吉一线.(2)古亚洲洋西段洋盆关闭的时间大概是早石炭-中二叠世,东段洋盆关闭的时间是晚二叠世;其中,北山北部和南天山西南段的洋盆延续至晚二叠世,洋盆关闭的时间可能在二叠纪末或更晚.此外,针对古亚洲洋构造域上古生界地层出露及其研究现状,提出了古生物学和地层学在未来古亚洲洋演化研究中可能发挥的作用及其具体方法.The southern margin of the Paleo-Asian Ocean spanned Xinjiang,Gansu,Inner Mongolia,Heilongjiang and other places of China.This paper summarizes the history of Paleozoic tectonic evolution of Paleo-Asian Ocean and addresses the debates on the evolution.Based on the analysis of outcrops of the Upper Paleozoic and researches on paleontology(including brachiopods,radiolarians and plants)through the Paleo-Asian Ocean Domain in China,two conclusions are made.Firstly,during the Early Palaeozoic,the main basin of the Paleo-Asian Ocean might be located in the Tianshan area within western China and in the Airgin Sum-Hegenshan-Linxi-Heihe area within middle and eastern China.During the Late Paleozoic,the main basin of the Paleo-Asian Ocean might be located in the South Tianshan area within western China and in the Solonker-Ondor Sum-Xar Moron-Yanji area within middle and eastern China.Secondly,the west part of the Paleo-Asian Ocean might have been closed in the Early Carboniferous to the Middle Permian while the east part has been closed in the Late Permian.However,the north part of the ocean in Beishan area and the southwest part of the ocean in the South Tianshan persisted to the end-Permian at least.Additionally,this study proposes the potential application of palaeontology(i.e.,radiolarians,fusulinids,corals)and of palaeoecology of benthic faunas in the evolution of Paleo-Asian Ocean.

关 键 词：古亚洲洋 构造演化 古生代 腕足类 放射虫 古植物 地层学 

分 类 号：P53[天文地球—古生物学与地层学]