黄骅坳陷孔南地区孔店组冲积扇沉积特征及地质意义

利用钻井岩心、测井及地震资料，对黄骅坳陷孔南地区孔店组孔一下亚段进行岩石学、测井响应及地震反射特征的综合研究，识别出4种岩相组合、4种测井相类型和3种地震相类型；划分出扇中和扇端亚相；建立了冲积扇的垂向沉积序列并探讨了冲积扇的空间展布规律。认为研究区孔一下亚段陡坡带属于干旱气候条件下发育的进积型冲积扇沉积体系类型。冲积扇的研究是孔二段到孔一段古环境变化、古构造及盆地演化的重要证据。

Alluvial fan deposits in the Kongdian Formation,Huanghua depression

The petrology, logging response and seismic reflection are dealt with for the alluvial fan deposits in the lower submember of the first member of the Kongdian Formation in the Huanghua depression. The emphasis is placed on the recognition of four lithofacies associations, four logging facies and three seismic facies; division of mid-fan and fan apex subfacies; construction of the vertical sequences of the alluvial fan deposits, and examination of spatial distribution of the alluvial fan deposits. The lower submember of the first member of the Kongdian Formation is assigned to the progradational alluvial fan depositional system developed in the dry climatic conditions. The results of research in this study may provide useful approach to the exploration of palaeo-environmental changes, palaeo-tectonic uplifting and basin evolution from the second member to the first member of the Kongdian Formation.