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《Acta Sedimentologica Sinica》 2018-04
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A Research on Relative Lacustrine Level Changes of the Lower Triassic Baikouquan Formation in Mahu Sag of Junggar Basin

ZHANG Tan;ZHANG ChangMin;QU JianHua;ZHU Rui;YUAN Rui;PAN Jin;TAO JinYu;College of Geoscience,Yangtze University;Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina;  
The Triassic Baikouquan Formation in Junggar Basin has not been clear about the characteristics of relative lake level changes,which restricts the analysis of their distribution and evolution of the sediments. This formation can be divided into one long-term sequence cycle,four mid-sequence cycles,16 short-term sequence cycles,126 super short-term sequence cycles on the high-resolution sequence stratigraphic division method combined with traditional qualitative analysis and quantitative logging wavelet transform analysis,under the guidance of high-resolution sequence stratigraphy theory,comprehensive drilling,logging and other information. The 126 super short-term sequence cycles were Fisher plots. Analysis of the Fisher plots shows the characteristics of relative lacustrine level changes. The Baikouquan Formation relative lacustrine level change is a continuous lacustrine transgression process. T1 b1,T1 b2 and T1 b3,respectively,corresponds to a large-scale lacustrine transgression process,and each the large lacustrine transgression process contains several times of the lake level rise and fall cycle,and at T1 b3 lake level reached the largest area.Compared with previous results and drilling geological information,we find that the lake curve has high reliability.
【Fund】: 国家科技重大专项(2016ZX05027-02-007);; 国家自然科学基金项目(41302096)~~
【CateGory Index】: P618.13
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