塔里木地块新元古代冰期事件研究进展  

Research progress on the Neoproterozoic glaciations in the Tarim Block

作　　者：李王鹏 王毅[3] 李慧莉[3] 杨伟利[3] 张仲培[3] 陈跃[4] 王斌[4] 刘少峰[5] 顾浩 钱涛[6] 李晓剑 LI Wangpeng;WANG Yi;LI Huili;YANG Weili;ZHANG Zhongpei;CHEN Yue;WANG Bin;LIU Shaofeng;GU Hao;QIAN Tao;LI Xiaojian(State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development,Beijing 102206,China;Sinopec Key Laboratory of Shale Oil/Gas Exploration&Production Tecnology,Beijing 102206,China;Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 102206,China;Institute of Petroleum Geology,Petroleum Exploration and Production Research Institute,SINOPEC,Wuxi,Jiangsu 214151,China;School of Earth Science and Mineral Resources,China University of Geosciences(Beijing),Beijing 100083,China;Institute of Geomechanics,Chinese Academy of Geological Science,Beijing 100081,China;School of Earth Sciences,East China University of Technology,Nanchang,Jiangxi 330013,China)

机构地区：[1]页岩油气富集机理与高效开发全国重点实验室,北京102206 [2]中国石化页岩油气勘探开发重点实验室,北京102206 [3]中国石油化工股份有限公司石油勘探开发研究院,北京102206 [4]中国石油化工股份有限公司石油勘探开发研究院,无锡石油地质研究所,江苏无锡214151 [5]中国地质大学(北京)地球科学与资源学院,北京100083 [6]中国地质科学院地质力学研究所,北京100081 [7]东华理工大学地球科学学院,江西南昌330013

出　　处：《地质学报》2023年第3期938-960,共23页Acta Geologica Sinica

基　　金：国家自然科学基金项目(编号41902149、41702238);中国石化科技部项目(编号P17046-3);中国地质科学院基本科研业务费项目(编号DZLXJK202004)联合资助的成果。

摘　　要：新元古代冰碛岩地层记录了“雪球地球”极端气候事件重要的地质信息。塔里木地块东北缘库鲁克塔格地区、西北缘阿克苏地区和西南缘叶城地区新元古代冰碛岩地层露头发育,是研究新元古代冰期事件的理想基地。文章基于塔里木地块周缘新元古界详实的野外地质调查工作,综合了地层学、同位素年代学、岩石地球化学等研究,聚焦冰碛岩地层沉积时代这一核心问题,建立新元古代冰期格架。冰期事件对比显示,贝义西冰期(库鲁克塔格地区)相当于Kaigas冰期(国际),阿勒通沟冰期(库鲁克塔格地区)、巧恩布拉克冰期(阿克苏地区)、波龙冰期(叶城地区)相当于Sturtian冰期(国际),特瑞爱肯冰期(库鲁克塔格地区)、尤尔美那克冰期(阿克苏地区)、雨塘冰期(叶城地区)相当于Marinoan冰期(国际),汉格尔乔克冰期(库鲁克塔格地区)相当于Gaskiers冰期(国际)。同时基于冰期事件对比关系,建议根据国际地层委员会的最新划分方案将塔里木地块南华系底界调整为与全球性Sturtian冰期沉积底界相当的层位。通过探讨新元古代冰期事件与古老烃源岩发育的耦合关系,分析了新元古界优质烃源岩的发育潜力,指出塔里木地块新元古界具备良好的油气成藏地质条件。塔里木地块新元古代冰期事件的研究,对推进该地块前寒武纪基础地质研究及深层—超深层油气勘探具有重要意义,是介入新元古界基础科学研究的有效切入点。The Neoproterozoic diamictite have recorded significant geological information about the“Snowball Earth”event.The outcrops are well developed in the Quruqtagh area along the northeastern margin,the Aksu area along the northwestern margin and the Yecheng area along the southwestern margin of the Tarim Block,which is an ideal research base for studying the Neoproterozoic glaciations.Based on the detailed field geological survey of the Neoproterozoic along the margin of the Tarim Block,this paper integrates the studies of stratigraphy,isotope chronology and petrogeochemistry.The focused key scientific issue of this project is the constraint on the deposition time of the Neoproterozoic diamictite,and establishes the Neoproterozoic glaciation framework.Comparative analysis of glaciations indicates that the Beyixi glaciation(Quruqtagh area)corresponds to the Kaigas glaciation(global).The Altungol glaciation(Quruqtagh area),the Qiaoenbrak glaciation(Aksu area),the Bolong glaciation(Yecheng area)correspond to the Sturtian glaciation(global).The Tereekan glaciation(Quruqtagh area),the Yuermeinak glaciation(Aksu area),the Yutang glaciation(Yecheng area)correspond to the Marinoan glaciation(global).The Hangelchaok glaciation(Quruqtagh area)corresponds to the Gaskies glaciation(global).Based on the correlation of glaciations,according to the latest classification scheme of the International Commission on Stratigraphy,it is suggested that the bottom boundary of the Nanhua System in the Tarim Block should be adjusted to be equivalent to the global Sturtian glacial sedimentary bottom.The development potential of the Neoproterozoic high-quality source rocks is analyzed by discussing the coupling relationship between Neoproterozoic ice age events and the development of ancient source rocks,and it is pointed out that there are good geological conditions for the Neoproterozoic hydrocarbon accumulation in the Tarim Block.The study of the Neoproterozoic glaciations in the Tarim Block is of great significance for the advance of th

关 键 词：塔里木地块 新元古代 冰碛岩 冰期事件 雪球地球 

分 类 号：P534.3[天文地球—古生物学与地层学] P532[天文地球—地质学]