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古地理学报 ›› 2001, Vol. 3 ›› Issue (2): 72-81. doi: 10.7605/gdlxb.2001.02.008

• 岩相古地理学及沉积学 • 上一篇    下一篇

层序地层作为沉积盆地识别标志的研究

覃建雄 陈洪德 田景春   

  1. 成都理工大学沉积研究所 610059
  • 出版日期:2001-04-01 发布日期:2001-04-01
  • 作者简介:覃建雄，男，33岁，1991、1996年于成都理工大学分别获得硕士、博士学位，1997-1999年在青岛海洋大学从事博士后研究工作。现为成都理工大学教授，从事储层沉积学、包裹体沉积学和层序地层学等方面的教学、研究工作。通讯地址：成都理工大学沉积研究所（610059）电子邮箱：jx_qin@mail.sc.cninfo.net或jx_qin@cdit.edu.cn 联系电话：028-4078992

SEQUENCE STRATIGRAPHY APPLIED TO THE IDENTIFICATION OF SEFIMANTARY BASIN

 Qin Jianxiong  Chen Hongde  Tian Jingchun   

  1. Chengdu University of Technology Chengdu，610059
  • Online:2001-04-01 Published:2001-04-01
  • About author:Qin Jianxiong, male, born in 1967, graduated from the Chengdu College of Geology in 1988, obtained the Ph. D. Degree, and served as a postdoctoral research fellow in the Ocean University of Qingdao. Now he is a professor in the Chengdu University of Technology, and mainly working on sedimentary geology & marine sedimentology.

摘要：

 论文以盆地充填动力学为指导，从层序界面与盆山转换、层序级别与盆地规模、层序格架与盆地类型、层序充填与盆地演化四方面，对层序与盆地的关系进行了初步研究，结果表明层序作为盆地的识别标志主要包括：1）不同成因类型和规模级别的界面作为划分相应成因级别层序的重要标志，他们反映地壳演化过程中的动力转换事件，其中超级、I级、Ⅱ级界面分别反映盆地域之间、盆地之间、盆山之间的应力转换机制，Ⅲ-Ⅳ级界面揭示了构造、海平面、气候、物源联合引起的盆地容纳空间和沉积机制的转变过程；2）作为板间、板缘、板内过程的沉积记录，层序与盆地之间存在特定的耦合关系：超级层序相当于沉积盆地域，I级层序相当于沉积盆地，Ⅱ级层序对应于盆地构造沉积幕，Ⅲ级层序对应于盆地充填幕，Ⅳ-Ⅴ级层序相当于盆地充填韵律；3）不同成因沉积盆地，层序成因格架及内部构型各异，因而根据层序特征研究，可判识盆地成因属性；4）在盆地演化的不同阶段，盆地性质、构造特征、沉积格局存在差异，所形成的层序构型、界面属性及组合特征等亦不同，因而通过层序充填序列的研究，可揭示盆地演化过程。

Abstract:

 In the light of sequence -basin-geosystem theory in conjunction with previous results, the relationship between sequence and basin has been tentatively studied. The following aspects have been addressed: 1) sequence boundaries and basin-mountain transformation; 2) sequence hierarchies and basin scales; 3) sequence genetic frameworks and basin types; and 4) sequence filling successions and basin evolution. Several relationships between sequence stratigraphic frameworks and the basin natures have been discussed. 1) Different hierarchies and genesis of sequence boundaries reflect the dynamic transformation of sedimentary basin, in which super, first-order, second-order boundaries indicate the stress mechanisms of the basin tract-basin tract, basin-basin, and basin-mountain transformation, the third and fourth-order boundaries reflect the transformation process of accommodation and sedimentation mechanism. 2) Different hierarchies of sequences show a certain intrinsic coupling relationships with sedimentary basins: the super-order sequence corresponds to the sedimentary basin tracts, the first-order sequence corresponds to the sedimentary basin, the second-order sequence corresponds to the basin tectonic stage; the third-order sequence corresponds to the basin infilling episodes; the fourth and fifth-order sequences correspond to the basin filling rhythms. 3) Sequence characteristics such as boundary nature, sequence geometry, structure, scale, thickness, completeness and symmetry etc., are different in different genetic basins. Therefore, sedimentary basin can be identified based on sequence genetic framework and internal architecture. 4) The nature, structure and sedimentary framework of basins are different during various stage of basin evolution, which results in the differences in the architectures of sequence sets and the boundary attributes and their combination characteristics. Therefore, the sedimentary basin tectonic stage and evolution history can be distinguished based on the combined characteristics, composition, architecture, and infilling pattern of sequence sets.