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本文利用古生物、地球化学、岩石学和构造背景等证据证实该区为内陆湖泊沉积环境。然后,主要依据野外露头剖面和钻井地质剖面,对平邑盆地下第三系官中段湖相含膏碳酸盐岩进行了层序地层学的初步研究。根据准层序和层序界面标志,在平邑盆地官中段中识别出四个层序和十二个准层序。每个层序又包括高水位、湖侵和低水位三个体系域。对每个层序和体系域边界的识别标志和沉积特征进行了详细论述,并且建立了湖相含膏碳酸盐层序地层学模式。最后,讨论了在勘探开发上的意义。
This paper uses the evidences of paleontology, geochemistry, petrology and tectonic setting to prove that this area is the inland lacustrine sedimentary environment. Then, based on the field outcrop profile and drilling geological section, the sequence stratigraphy of lacustrine-lacustrine carbonate rocks in the middle part of the Lower Tertiary of Pingyi Basin was studied. According to quasi-sequence and sequence boundary markers, four sequences and twelve quasi-sequences are identified in Guanzhong section of Pingyi basin. Each sequence also includes three systems of high water level, lake invasion and low water level. The identification marks and sedimentary features of each sequence and system boundary are discussed in detail, and the lacustrine-based carbonate sequence stratigraphic model is established. Finally, the significance of exploration and development is discussed.