Sedimentary Sequence of the T一R Cycle and A Studied Exampl a in the Continental Faul t Lacustrine Basin

Guo Jianhua; Gong Shaobo; Wu Dongsheng

The subsiding mechanism,basin shape and other features of the continental fault lacustrine basin are dif-ferent from those of other sedimentary basins，which results in the difference of the interior constitution ofsedimentary sequence and the feature of sequence boundary. The sequence stratigraphy model from the pas-sive continental-margin cannot be directly applied to the basin,althouth the basic principle of sequence stratig-raphy is still applicable.This paper analysed the sedimentary sequence of the lacustrine transgressive and la-custrine regressive cycle (T-R cycle)from the lacustrine basin of Dongpu，and showed that the sequence iscomposed of the lower lacustrine trangressive system trace (LTST) and upper lacustrine regressive systemtrace(LRST). The reservoir sandbodies of various genetic types were well developed in LTST. The high fre-quency T-R cyclical sequences superimposing on the tectonic sedimentary cycle lacked the Type I sequenceboundary because of the steep margin of the fault basin and the little change of lake level Main factors control-ling the development of the T-R cycle are the episodic movement of structure(fault)and the higher frequenceT-R cycle is related to Milankovitch climate cycle.

Jianghan Petrolieum Institute Hubei Jingzhou 434102

Received Date: 1997-01-10

Rev Recd Date: 1997-06-25

Publish Date: 1998-03-10

Key words:

continental fault lacustrine basin /
lacustrine transgressive-lacustrine regressive cycle /
sedimentary sequence.

Abstract: The subsiding mechanism,basin shape and other features of the continental fault lacustrine basin are dif-ferent from those of other sedimentary basins，which results in the difference of the interior constitution ofsedimentary sequence and the feature of sequence boundary. The sequence stratigraphy model from the pas-sive continental-margin cannot be directly applied to the basin,althouth the basic principle of sequence stratig-raphy is still applicable.This paper analysed the sedimentary sequence of the lacustrine transgressive and la-custrine regressive cycle (T-R cycle)from the lacustrine basin of Dongpu，and showed that the sequence iscomposed of the lower lacustrine trangressive system trace (LTST) and upper lacustrine regressive systemtrace(LRST). The reservoir sandbodies of various genetic types were well developed in LTST. The high fre-quency T-R cyclical sequences superimposing on the tectonic sedimentary cycle lacked the Type I sequenceboundary because of the steep margin of the fault basin and the little change of lake level Main factors control-ling the development of the T-R cycle are the episodic movement of structure(fault)and the higher frequenceT-R cycle is related to Milankovitch climate cycle.

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[1]

1 Vail P R,Hardenbol J,Todd R G. Jurassic unconformities.chronos-tratrgraphy, and sea level change from seismic stratigraphy andbiostratigraphy.In:Schlee J S.ed.Interregional unconformities andhydrocarbon exploration. AAPG Memoir.1984.36:129一144

2 Van Wagoner J C. An Overview of the fundamentals of sequencestratigraphy and key definition.In: Wilgus C K, ed. Sea一LevelChanges; An Integrated Approuch. SEPM. Spec. Publ.，1988.42:39-V 45

3 Galloway W E. Genetic stratigraphic sequences in basin analysis I:architecture and genesis of flooding-surface bounded depositional u-nits. AAPG. 1989.73:125-142

4 Johnson J G.Klapper G.Sandberg C A. Devonian eustatic fluctua-tions in Euramerica. Geological Society of America Bulletin, 1985,96:567-587

5 Cross T A. Controls on coal distribution in transgressive-reegressivecycles,Upper Cretaceous.Estem Interior.U. S. A. In; Wilgaus C K,ed. Sea-level Changes; An Integrated Approach. SEPM. Spec.Publ..1988.42:371-380

6 Posamentier M W. Siliciclastic sequence stratigraphic patterns inforeland ramp-type basins. Geology.1993.21:455-458

7 郭建华，曾允孚，翟永红等.新疆塔中石炭系层序地层学研究—一个克拉通内拗陷盆地的层序地层框架模式.地质学报，1996.70(4) :361 -373

8 Shanly K W. McCabe P S. Prespectives on the sequence stratigra-phy of continental siata. AAPG Bulletin.1994,78(4):544-5689

9 Scholz C A, Rosndahl B R, Scott D L. Development of coarse- grained faces in lacustrine rift basins: Examples from East Africa. Geology.1990,18:140-14410

11 李思田，林畅松，解习农等.大型陆相盆地层序地层学研究— 以鄂尔多斯中生代盆地为例.地学前缘，1995.2(3-4):133- 136

11顾家裕.陆相盆地层序地层学格架概念及模式.石油勘探与开发，1995,22(4):6-10

12黄汲清，任纪舜，姜春发等.中国大地构造基本轮廓·地质学报， 1977,51(2)17一135

13朱夏.我国陆相中新生界含油气盆地的大地构造特征及有关间题.大地构造问题.北京:科学出版社，1965. 10-15

14 王鸿祯，李光岑编译.国际地层时代对比表.北京:地质出版社1990

15 郭建华，郭成贤，翟永红等.东淮凹陷前梨园地区Es₃⁴-Es₃³豆亚段沉积旋回与沉积体系.石油实验地质，1996,18(4):377-384

16 Hays J O,Imbrie J,Shackleton N J. Varations in the Earth's Or-bit;pacemaket of the ice ages. Science,1976.194:1 121-1 130

17 Olsen H. Astronomical forcing of meandering river behaviour:Mi-lankovitch cycles in Devonian of East Greenland. Palaeogeo.Palaeoeco.1990,79:99一115.

Sedimentary Sequence of the T一R Cycle and A Studied Exampl a in the Continental Faul t Lacustrine Basin

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