期刊文献+

中扬子及邻区层序地层与原型盆地演化 被引量:22

STRATIGRAPHIC SEQUENCES IN THE MIDDLE YANGTZE & ADJACENT REGION AND EVOLUTION OF PROTOTYPE BASINS
下载PDF
导出
摘要 中扬子及邻区原型盆地可划分为 9个大层序 ,其中 ,1~ 6大层序由中、古生代海相地层组成 ;第 7大层序为早、中侏罗纪的陆相沉积 ;第 8大层序为晚侏罗世的前渊沉积 ;第 9层序为晚白垩世至第三纪的伸展盆地。震旦纪 ,中部地区为台地相环境 ,向南为浅海陆棚环境 ,向北以陆表海为主 ;寒武纪至早奥陶世为典型的大陆边缘盆地 ;中、晚奥陶世至志留纪为裂谷盆地发展阶段 ;泥盆纪至石炭纪该区发生广泛海侵 ,与华南海域和太平洋海域多处相连 ;二叠纪至早、中三叠世为原型盆地的重要转型时期 ,随着分隔秦岭微板块与扬子板块的勉略古洋盆向东打开 ,扬子北缘由前期的区域性隆起转变为向北加深的大陆边缘盆地 ;晚三叠世经历了两次幕式旋回 ,巴东组沉积时期盆地沉降缓慢 ,九里岗组沉积时期则较快 ;早、中侏罗世原型盆地早幕 (早侏罗世 )沉积缓慢 ,晚幕 (中侏罗世 )快速沉降 ,以水下沉积作用为主 ;晚侏罗世可划分为两大构造演化阶段 ,早期构造活动相对平静 ,晚期强烈 ;晚白垩世至老第三纪 ,盆地范围缩小 ,以湖泊、河流体系为主。由此 ,中扬子及邻区在地质历史时期经历了 4种不同性质的原型盆地 ,具有幕式充填特征。 Prototype basins in the middle Yangtze and its adjacent region can be divided into nine mega- sequences. Sequence I-VI are composed of Mesozoic-Palaeozoic marine beds; Sequence VII is made up of the early-middle Jurassic terrestrial deposits; Sequence VIII consists of Jurassic foredeep deposits; Sequence IX is characterized by the late Cretaceous and Tertiary rift basin deposits. During the Sinian Period, the central region was in the environment of platform facies while the south region was in the environment of shallow marine shelf and the north region was mainly in the environment of epicontinent sea. The Cambrian to the early Ordovician is characterized by typical continent marginal basins. Rift basins were well developed during the middle-late Ordovician -Silurian; Extensive transgression events occurred during the Devonian and Carboniferous which connected with several places of the South China Sea waters and the Pacific Ocean sea waters; From the Permian to the middle Triassic, the prototype basins were in the stage of transformation with Mianlue palaeo- oceanic basin(which separated Qinling micro-plates from the Yangtze plate )opening towards east and the former regional uplift in the northern margin of the Yangtze was transformed into the continent marginal basins of deepening northward. During the late Triassic, two episodic depositional cycles occurred in the region where Badong Formation is characterized by slow subsidence deposits and Jiuligang Formation by rapid subsidence deposits. The prototype basins experienced slow deposition in the early Jurassic and rapid deposition dominated by underwater sedimentation in the middle Jurassic. Two tectonic evolution stages can be classified in the late Jurassic, tectonic activities in the early stage was relatively quiet and in the late stage was quite strong. During the late Cretaceous-early Tertiary, the basins became smaller in size dominated by lacustrine and fluvial deposits. Therefore,the middle Yangtze and its adjacent region have experienced in geological history four types of prototype basins with the characteristics of episodic sedimentation.
作者 戴少武
出处 《石油与天然气地质》 EI CAS CSCD 北大核心 2002年第3期229-235,共7页 Oil & Gas Geology
基金 国家自然科学基金项目 (批准号 4973 2 0 80 )资助
关键词 原型盆地 演化 大层序 沉积格架 幕式演化 中扬子 邻区 层序地层 油气勘探 prototype basin mega-sequence sedimentary framework episodic evolution middle Yangtze and adjacent region
  • 相关文献

参考文献3

二级参考文献12

  • 1夏文臣,周杰,雷建喜.沉积盆地中等时性地层界面的成因类型及其在成因地层分析中的意义[J].地质科技情报,1993,12(1):27-32. 被引量:16
  • 2李思田,中国邻区构造古地理,1990年
  • 3夏文臣,沉积盆地的成因地层分析,1989年
  • 4夏文臣,地球科学,1988年,13卷,1期,35页
  • 5魏合明,地质科技情报,1987年,6卷,4期,87页
  • 6团体著者,贵州省区域地质志,1987年
  • 7侯方浩,沉积学报,1984年,2卷,4期,17页
  • 8夏文臣,华南晚三叠世前盆地的成因地层格架及演化历史,1994年
  • 9夏文臣,地球科学,1991年,16卷,5期,477页
  • 10朱夏,石油实验室地质,1991年,13卷,3期,201页

共引文献442

同被引文献412

引证文献22

二级引证文献242

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部