Characteristics of Sequence Stratigraphy of Jiangling Shallow to Semi-deep Water Depressional Lake Basin

LU Ming-Guo; LIN Chang-Song; LIAO Zhong-Li; ZHANG Jian-Hua

Guided with the theory of sequence stratigraphy, the characteristics of sequence stratigraphy of Jiangling shallow to semi-deep water depressional lake basin has been studied systematically. The study indicates that the regional unconformable and sedimentary transformation interfaces are the main interfaces of Ⅲ-order sequence. Though lowstand, highstand and lake transgressive system tracts developed in the studied sequence, the development degrees of different system tracts are quite different, which result in the asymmetric distribution of sequential cycles. The sedimentary facies in different system tracts consist of mainly fluvial delta and shallow lake facies, with alluvial fan and fan delta underdeveloped. The lake water body has experienced no obvious expansion and shrinkage. The fluctuation of water level of the lake has caused no regional changes of sedimentary facies belts. Two particular filling model of sequence stratigraphy have been constructed on the basis of the study results.

1. China University of Geosciences, Beijing 100083;

2. Jianghan Oilfield Company of China Petroleum & Chemical Corporation,Qianjiang Hubei 433124

Received Date: 2002-09-03

Rev Recd Date: 2002-10-28

Publish Date: 2003-06-10

Key words:

shallow to semidepth water depressional lake basin /
division of sequential stratigraphy /
evolution of sedimentary fillings /
model of sequence stratigraphy /
Jiangling Depression /

Abstract: Guided with the theory of sequence stratigraphy, the characteristics of sequence stratigraphy of Jiangling shallow to semi-deep water depressional lake basin has been studied systematically. The study indicates that the regional unconformable and sedimentary transformation interfaces are the main interfaces of Ⅲ-order sequence. Though lowstand, highstand and lake transgressive system tracts developed in the studied sequence, the development degrees of different system tracts are quite different, which result in the asymmetric distribution of sequential cycles. The sedimentary facies in different system tracts consist of mainly fluvial delta and shallow lake facies, with alluvial fan and fan delta underdeveloped. The lake water body has experienced no obvious expansion and shrinkage. The fluctuation of water level of the lake has caused no regional changes of sedimentary facies belts. Two particular filling model of sequence stratigraphy have been constructed on the basis of the study results.

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Reference (13)

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Characteristics of Sequence Stratigraphy of Jiangling Shallow to Semi-deep Water Depressional Lake Basin

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