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GEOREF RECORD

Evolution of Miocene footwall-derived coarse-grained deltas, Gulf of Suez, Egypt; implications for exploration

R. L. Gawthorpe, J. M. Hurst and C. P. Sladen
Evolution of Miocene footwall-derived coarse-grained deltas, Gulf of Suez, Egypt; implications for exploration
AAPG Bulletin (July 1990) 74 (7): 1077-1086

Abstract

The Miocene Abu Alaqa Group, exposed on the eastern side of the Gulf of Suez, contains a series of coarse-grained delta deposits located in the hanging wall of the northwest-trending East Margin fault zone. Seven major fan sequences have been identified. The first three fan sequences are aggradational and cover an area of less than 2 km2. The sequences are dominated by pebble/boulder conglomerates, with predominantly sigmoidal, high-angle clinoforms (between 15 and 25 degrees ) as much as 150 m high. These fan sequences represent talus cones and fan deltas, which were probably deposited during activity on the fault zone and are situated at transfer segments. The other four fan sequences are predominantly progradational, consisting of mixed carbonate-siliciclastic braid deltas with local reefs. They are less than 30 m high, have low-angle clinoforms (< 15 degrees ), and cover an area as large as 30 km2. These fan sequences were deposited during a phase of tectonic quiescence when sedimentary and eustatic mechanisms determined sand-body geometry. These fan deltas and braid deltas may form hydrocarbon traps in the subsurface and create localized reservoirs. The rapid facies change into basinal fines creates an excellent lateral stratigraphic seal, but vertical and lateral seals across the fault zone generally are not well developed.


ISSN: 0149-1423
EISSN: 1558-9153
Coden: AABUD2
Serial Title: AAPG Bulletin
Serial Volume: 74
Serial Issue: 7
Title: Evolution of Miocene footwall-derived coarse-grained deltas, Gulf of Suez, Egypt; implications for exploration
Affiliation: Univ. Manchester, Dep. Geol., Manchester, United Kingdom
Pages: 1077-1086
Published: 199007
Text Language: English
Publisher: American Association of Petroleum Geologists, Tulsa, OK, United States
References: 28
Accession Number: 1990-050221
Categories: Economic geology, geology of energy sourcesStratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., chart, geol. sketch maps
N27°40'00" - N30°00'00", E32°19'60" - E34°10'00"
N22°00'00" - N32°00'00", E25°00'00" - E35°30'00"
Secondary Affiliation: BP Explor., GBR, United Kingdom
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute.
Update Code: 1990
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