Study on Sequence Stratigraphy of Deep Water Sediments in Youjiang Basin

TIAN Jing chun; CHEN Hong de; PENG Jun; QIN Jian xiong; HOU Zhong jian

Nowadays the research of sequence stratigraphy h as become a hot spot problem in geology. But, it is very difficult to use the se quence stratigraphy theory to divide the sequence of deep water basin sedimentar y layer, this is because that the lithologic-character of deep water basin sedi mentary layer is very monotonous. In study area, from Devonian Period to Triassi c P eriod the strata of the deep water basin sediments are very well developed whi ch included turbidite and siliceous-mudstone sediment. So the paper discussed i n detail the sequence characteristics of deep water basin sedimentary layer. The results showed that the sequ ence boundary surface characteristic of turbidite sediments was obvious,which di splayd that the surface was irregular and the bottom of LST sandstones developed many different erosion surface, etc, and the sequence evolution of t urbidite was related to the turbidite fan's evolution. The sequence division of s iliceous-mudstone sediment can be identified through the analyses of content pr oportion and origin of mudstone.

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059

Received Date: 1999-06-30

Publish Date: 2000-06-10

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Abstract: Nowadays the research of sequence stratigraphy h as become a hot spot problem in geology. But, it is very difficult to use the se quence stratigraphy theory to divide the sequence of deep water basin sedimentar y layer, this is because that the lithologic-character of deep water basin sedi mentary layer is very monotonous. In study area, from Devonian Period to Triassi c P eriod the strata of the deep water basin sediments are very well developed whi ch included turbidite and siliceous-mudstone sediment. So the paper discussed i n detail the sequence characteristics of deep water basin sedimentary layer. The results showed that the sequ ence boundary surface characteristic of turbidite sediments was obvious,which di splayd that the surface was irregular and the bottom of LST sandstones developed many different erosion surface, etc, and the sequence evolution of t urbidite was related to the turbidite fan's evolution. The sequence division of s iliceous-mudstone sediment can be identified through the analyses of content pr oportion and origin of mudstone.

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Reference (9)

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Study on Sequence Stratigraphy of Deep Water Sediments in Youjiang Basin

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