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HEFEI BASIN IN EARLY CRETACEOUS -CHARACTERIZATION AND ANALYSIS OF PETROLEUM POTENTIAL
Author(s): YI Wanxia, ZHAO Zongju, LI Xuetian, SHEN Jinlong, ZHOU Jingao
Pages: 130-
144
Year: 2003
Issue:
1
Journal: GEOTECTONICA ET METALLOGENIA
Keyword: Early Cretaceous; Hefei Basin; Dabie orogenic belt; Tanlu fault; analysis of oil and gaspotential; Anhui;
Abstract: Comprehensive analyses were made based on seismic prospecting data, electrical prospecting data and basin simulation data as well as regional geological data and thorough discussions were conducted about the complicated structures, features and evolution of Hefei Basin in Early Cretaceous in this study,and it was derived that that Hefei Basin was a composite basin formed during the transformation of the stress field from compressive toward tensile in Early Cretaceous. In other words, this basin was a foreland basin of gliding-thrust type, which is mainly controlled by the Dabie orogenic belt in the south side in the early to middle period of Early Cretaceous, while being a strike-slip basin of pull-apart type,which is mainly controlled by the activity of Tanlu fracture in the east side in the middle to late period of Early Cretaceous. Moreover, the potential Lower Cretaceous oil and gas system in the pull-apart basin and the vista for its prospecting were explored in this study. Tectonism of the Tanlu fracture was further discussed based on the results of characterization of the basin, and it was pointed out that this is beneficial and instructive to the oil and gas prospecting in Hefei Basin
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