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《Journal of Chengdu University of Technology(Science & Technology Edition)》 2008-06
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The sequence characteristics and evolution of sequence-based lithofacies and paleogeography in Nadu Formation in the north scarp zone of the eastern depression of Baise basin,Guangxi,China

ZHU Zhi-jun1,2,CHEN Hong-de1,HOU Ming-cai1,DONG Gui-yu11.Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,China;2.College of Geosciences and Measurement Engineering,East China Institue of Technology,Fuzhou 344000,China  
On the basis of the comprehensive study of cores,log wells,outcrops and the conclusions of other papers,the authors have explored the lithofacies and paleogeographic features and the evolution of the Paleogene Nadu Formation in the eastern sector of the north scarp zone of the eastern depression of Baise basin.According to the high-resolution sequence stratigraphic theory,the Nadu Formation is divded into one super long-term sequence cycles,four long-term sequence cycles,eight medium-term sequence cycles and tens of short-term sequence cycles in this area.2 sequence-based lithofacies and paleogeography maps of No.1 phase of the Nadu Formation have been drawn up taking two long-term cyclic sequences(two sedimentary sequences corresponding to LSC3 and LSC4) as a unit.The results show that during the No.1 phase of the Nadu Formation fan delta front-shallow,the deep lake subfacies developed,and the fan delta plain did not developed and was only distributed over the northwest and northeast of the study area and along with the fault as a narrow strip.The fan delta front,shallow lake,and semi-deep lake developed well and were mainly located in the central and southeast vast region of the study area.
【CateGory Index】: P618.13
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