摘要
以塔里木盆地西南缘下石炭统和什拉甫组为例，将微相分析及古生态分析应用于准层序研究之中。在此基础之上，分析沉积层序及其内部各体系域、各种界面的沉积特征。同时，根据准层序垂直叠加的特征来寻找沉积层序内部更高级次的旋回，以达到提高沉积层序的分辨率之目的，恢复该地区维宪期多级次古海平面变化特征。强调准层序分析是高分辨露头层序地层学的研究基础。
This paper concentrates on the methods of the high-resolution sequence stratigraphy of outrcops by the studies of the Heshilafu Formation (Visean) in the southwestern area of the Tarim basin. The recognitions of parasequences are stressed for the studies of the outcrop sequence stratigraphy. .According to the .stacking pattern of parasequences, the system tracts and parasequence sets are identified easily, and the sequence boundaries are verified and stipulated. Generally, the stratigraphic records of parasequences consist of small-scale shallowing upward cycles separated by surface marked by abrupt change to deeper factes. The motif is produced by the high-frequency eustasy controlled by eustasy. 35 parasequences were recognized from the Heshilafu Formation based on the analysis of micro factes and palaeoecology, and 11 parasequence sets, 5 system tracts and 2 sequences were identified on the basis of the analysis of parasequences.
出处
《地层学杂志》
CSCD
北大核心
1995年第1期36-40,共5页
Journal of Stratigraphy
关键词
准层序
层序地层学
和什拉甫组
下碳世
parasequence
high-resolution outcrop sequence stratigraphy
Heshilafu Formation
