泌阳凹陷东南部下切谷的发现及其意义

doi:10.11743/ogg20010404

Abstract

Abstract:

According to sequence stratigraphic study,two sets of incised valley can be identified from Hetaoyuan Formation in the Southeast of Biyang Depression.The incised valley is clearly different from the around redbeds and marsh deposits on seismic profile,contains mainly conglomeratic coarse sandstone with abnormal high Sr,P and Mn²⁺ contents.This suggests that there had been a sudden change between the valley and the basement stratum.The valley is only found in Sungan Xiaermen area on the north slope of the depression,and distributed vertically in the lowstand system tract of sequencesⅡ and Ⅲ. The sedimentary characteristics and the filling manner are favourable for the formation of various concealed traps.

Key words: Biyang Depression, Hetaoyuan Formation, incised valley, sequence boundary, initial flooding surface, concealed trap

CLC Number:

TE121.3

Xian Benzhong, Jiang Zaixing, Cao Yingchang, Tu Yangfa. DISCOVERY OF INCISED VALLEY IN SOUTHEAST OF BIYANG DEPRESSION AND ITS SIGNIFICANCE[J]. Oil & Gas Geology, 2001, 22(4): 304-308.

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DISCOVERY OF INCISED VALLEY IN SOUTHEAST OF BIYANG DEPRESSION AND ITS SIGNIFICANCE

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