松辽盆地白垩纪综合年代地层格架  

Integrated chronostratigraphic framework for Cretaceous strata in the Songliao Basin

作　　者：吴怀春[1,2,3] 李山 王成善[1,3,4] 褚润健 王璞珺[5] 高远[1,3,4] 万晓樵[1,4] 贺怀宇[6] 邓成龙[6] 杨光[7] 黄永建 高有峰[5] 席党鹏[1,4] 王天天[1,3] 房强[1,2,3] 杨天水[1,3,4] 张世红[1,3,4] WU Huaichun;LI Shan;WANG Chengshan;CHU Runjian;WANG Pujun;GAO Yuan;WAN Xiaoqiao;HE Huaiyu;DENG Chenglong;YANG Guang;HUANG Yongjian;GAO Youfeng;XI Dangpeng;WANG Tiantian;FANG Qiang;YANG Tianshui;ZHANG Shihong(State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences(Beijing),Beijing 100083,China;School of Ocean Sciences,China University of Geosciences(Beijing),Beijing 100083,China;Frontiers Science Center for Deep-time Digital Earth,China University of Geosciences(Beijing),Beijing 100083,China;School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China;College of Earth Sciences,Jilin University,Changchun 130061,China;Stale Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Exploration Department,Jilin Oilfield Company,PetroChina,Songyuan 138000,China)

机构地区：[1]中国地质大学(北京)生物地质与环境地质国家重点实验室,北京100083 [2]中国地质大学(北京)海洋学院,北京100083 [3]中国地质大学(北京)深时数字地球前沿科学中心,北京100083 [4]中国地质大学(北京)地球科学与资源学院,北京100083 [5]吉林大学地球科学学院,吉林长春130061 [6]中国科学院地质与地球物理研究所岩石圈演化国家重点实验室,北京100029 [7]中国石油吉林油田分公司勘探部,吉林松原138000

出　　处：《地学前缘》2024年第1期431-445,共15页Earth Science Frontiers

基　　金：国家自然科学基金项目(41925010,41790451);教育部、科学技术部高等学校学科创新引智计划(“111计划”)项目(B20011)。

摘　　要：白垩纪是典型的温室气候时期,也是全球大规模烃源岩形成时期,但对于温室气候背景下陆地的环境状态、气候变化、生命响应及其演化规律尚不清楚;陆相有机质及大规模烃源岩堆积与气候环境变化之间的关系还不明确。中国东北的松辽盆地发育了世界上最完整的白垩纪陆相沉积记录,烃源岩在盆地内广泛分布,是研究白垩纪陆地气候-环境变化和烃源岩形成机制的绝佳地点。但由于露头剖面沉积记录“连续性”和“完整性”较差,缺乏高精度的综合年代地层格架约束,导致松辽盆地的地层划分与对比存在较多争议,一定程度上阻碍了白垩纪陆地古气候、古环境演化的研究进程。松辽盆地国际大陆科学钻探计划实施的松科1井、松科2井和松科3井共钻取了8197 m完整且连续的白垩纪陆相地层岩心记录。本文通过综合科探井岩石地层学、生物地层学、磁性地层学、同位素年代学和旋回地层学的研究成果,建立了松辽盆地白垩纪高分辨率综合年代地层格架,为探索白垩纪陆地深时气候-环境演化及服务松辽盆地油气勘探可持续发展提供了精细的年代学证据。The Cretaceous is a typical greenhouse period with global large scale formation of organic-rich source rocks.However,we have only limited understanding of the terrestrial environmental status,climate change and biosphere responses and evolution during the greenhouse period;the effect of climate and environmental changes on the terrestrial organic accumulation and large scale source rock formation remains unclear.To study these issues the Songliao Basin in northeastern China offers an unique opportunity.The Songliao Basin has widespread distribution of Cretaceous source rocks and possesses the most complete sedimentary record of the Cretaceous in the world.One challenges,however,was the lack of high-quality rock records due to low continuity and low completeness of the records,which has caused controversies over the stratigraphic division of the Songliao Basin.Recently,the 8197 m drill core obtained from ICDP(Continental Scientific Drilling Program)boreholes(SK-1,SK-2,SK-3)provided a virtually complete terrestrial stratigraphic record of Cretaceous strata of the basin.In this study,by evidence synthesis using results of lithostratigraphy,biostratigraphy,magnetostratigraphy,radioisotope geochronology,and cyclostratigraphy,we constructed a high-resolution,integrated Cretaceous chronostratigraphic framework for the Songliao Basin,which provided fine chronological reference for studying the evolution of deep-time Cretaceous climate and environment as well as promoting sustainable oil and gas development in the Songliao Basin.

关 键 词：白垩纪 国际大陆科学钻探项目(ICDP) 松辽盆地 地质年代学 旋回地层学 

分 类 号：P534.53[天文地球—古生物学与地层学] P535[天文地球—地质学]