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Seismic and sequence stratigraphy of Upper Cretaceous-Tertiary succession, eastern Abu-Gharadig Basin, Western Desert, Egypt

机译:埃及西部沙漠东部阿布-加拉迪格盆地上白垩统-第三系演替的地震和层序地层

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This work deals with the sequence stratigraphy of the subsurface Upper Cretaceous and Cenozoic succession of the eastern Abu Gharadig Basin in the Western Desert of Egypt. The micropaleontological inspection of the cuttings from four wells: WD 14/1, East Mubarak-1, East Mubarak-2, East Mubarak-3, revealed 23 foraminiferal biozones and six calcareous nannofossil zones and the presence of several hiatuses. The information obtained from biostratigraphic analysis, well data and seismic interpretation for the studied area has enabled the classification the Upper Cretaceous and Cenozoic succession into five major depositional sequences and these units were then correlated with those recorded in the north Western Desert and elsewhere Most of the major sequence boundaries and the unconformity surfaces inbetween compared well with those of Kharga Oasis, Farafra Oasis, the global cycle chart of Haq et al. (1988),the Western European sea-level curve of Hardenbol et al. (1998) and with the sequence boundaries, flooding surfaces and the sea-level curve of Haq and Al-Qahtani 2005, indicating that most of them are caused by global eustasy and some of the sequence boundaries are related to local tectonism. Three of the identified Upper Cretaceous-Cenozoic major sequences coincide with those of Haq and Al-Qahtani 2005 along the Arabian Platform, while two of them were formed due to local tectonic events.
机译:这项工作涉及埃及西部沙漠东部阿布加拉迪格盆地地下上白垩统和新生代演替的层序地层学。对来自四个井(WD 14/1,East Mubarak-1,East Mubarak-2,East Mubarak-3)的钻屑进行微古生物学检查,发现了23个有孔虫生物区和6个钙质纳米化石区,并发现了几个裂隙。从研究地区的生物地层学分析,井数据和地震解释中获得的信息已将上白垩统和新生代演替划分为五个主要沉积层序,然后将这些单元与西北沙漠和其他地区记录的单元关联起来。 Haq等人的全球循环图与Kharga Oasis,Farafra Oasis的主要序列边界和它们之间的不整合面比较好。 (1988年),Hardenbol等人的西欧海平面曲线。 (1998年)以及Haq和Al-Qahtani 2005年的层序边界,洪泛面和海平面曲线,表明它们大多数是由全球狂喜造成的,某些层序边界与局部构造有关。确定的上白垩统-新生代主要序列中的三个与沿着阿拉伯平台的Haq和Al-Qahtani 2005的序列一致,而其中两个是由于局部构造事件形成的。

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