干旱区生态环境知识资源中心(Arid): Successive first downhole sporomorph-events: Applied biostratigraphic tool for fault delineation within Baharyia Formation, Abu Sennan area, Abu Gharadig Basin, Egypt

Arid

DOI	10.1016/j.jafrearsci.2020.104095
	Successive first downhole sporomorph-events: Applied biostratigraphic tool for fault delineation within Baharyia Formation, Abu Sennan area, Abu Gharadig Basin, Egypt
	Said, Somia G.; Tahoun, Sameh S.; Galal, Tamer R.; Effat, Nadia K.
通讯作者	Tahoun, SS (corresponding author), Cairo Univ, Fac Sci, Geol Dept, POB 12613, Giza, Egypt.
来源期刊	JOURNAL OF AFRICAN EARTH SCIENCES
ISSN	1464-343X
EISSN	1879-1956
出版年	2021
卷号	175
英文摘要	Two hundred and seventy four samples, covered the Bahariya sections encountered in 13 boreholes, drilled in three main fields of the General Petroleum Company concession, Abu Gharadig Basin, north Western Desert, were critically investigated for their palynomorphs content. A standard acid-based palynological processing technique is employed to extract the palynomorphs. Fair to moderate diversity and moderate to good preserved palynomorph assemblage has been recovered. This study yielded 107 species of spores, pollen grains and dinoflagellate cysts. Six remarkable successive first downhole appearance (FDA) sporomorph-events are defined and biostratigraphically utilized for dividing the Bahariya Formation and delineating the Bahariya/Kharita contact. The upper Bahriya unit includes the first Afropollis jardinus event dated latest early Cenomanian, while the middle Bahriya unit comprises the second Elatersporites klaszii event dated early Cenomanian. The lower Bahriya unit, dated early Cenomanian-late Albian, contains the third, fourth, and fifth Cretaceieporites densimurus, Trilobosporites laevigatus and Stellatopollis sp. events, respectively. The contact between Bahriya Formation and the upper part of the underlying Kharita Formation, dated early-middle Albian, is placed on Concavisimisporites punctatus event. The authors found the possibility of these six zones to be widely traced and provide potential bio-correlation tool for the Bahariya sections in Abu Gharadig Basin. According to the presence or absence of such six successive events and their average zonal thicknesses, the intra-formational disconformities and positions of the faults could be allocated with confidence. The remarkable thinning in the thickness of such zones could localize the position of disconformities caused by non deposition or erosion/faulting within the Bahariya sections. The aforementioned six events could be correlated and nicely matched with their equivalent six log-based cycles on the log responses. The authors encourage the Egyptian industrial geologists to follow the presented successive six sporomorph-events in the future palynological-steering exploration and production activities in the Bahariya rock unit and effectively utilize such events as intra- and inter-basinal dating tool and possible correlation control for the Bahariya sections across the northern basins of Egypt.
英文关键词	Palynology Sporomorph events Bahariya formation Kharita formation Abu gharadig basin Egypt
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000629493900008
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350635
作者单位	[Said, Somia G.; Galal, Tamer R.; Effat, Nadia K.] Gen Petr Co, Explorat Dept, Nasr City, Egypt; [Tahoun, Sameh S.] Cairo Univ, Fac Sci, Geol Dept, POB 12613, Giza, Egypt
推荐引用方式 GB/T 7714	Said, Somia G.,Tahoun, Sameh S.,Galal, Tamer R.,et al. Successive first downhole sporomorph-events: Applied biostratigraphic tool for fault delineation within Baharyia Formation, Abu Sennan area, Abu Gharadig Basin, Egypt[J],2021,175.
APA	Said, Somia G.,Tahoun, Sameh S.,Galal, Tamer R.,&Effat, Nadia K..(2021).Successive first downhole sporomorph-events: Applied biostratigraphic tool for fault delineation within Baharyia Formation, Abu Sennan area, Abu Gharadig Basin, Egypt.JOURNAL OF AFRICAN EARTH SCIENCES,175.
MLA	Said, Somia G.,et al."Successive first downhole sporomorph-events: Applied biostratigraphic tool for fault delineation within Baharyia Formation, Abu Sennan area, Abu Gharadig Basin, Egypt".JOURNAL OF AFRICAN EARTH SCIENCES 175(2021).