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GEOREF RECORD

Depositional environment of Late Cretaceous to Eocene organic-rich marls from Jordan

Mohammad Ali Hussein, Mohammad Alqudah, Myrna Blessenohl, Olaf G. Podlaha and Joerg Mutterlose
Depositional environment of Late Cretaceous to Eocene organic-rich marls from Jordan
GeoArabia (Manama) (January 2015) 20 (1): 191-210

Abstract

Oil-shale beds formed under anoxic conditions that were controlled by various local, regional and global factors. The Jordanian oil shales, which were deposited during the Late Cretaceous to Eocene, are considered as an example for the interplay of these factors. Two cores of organic-rich marls were investigated and analyzed with respect to their lithology, ichnofabrics and carbonate microfacies. The first core (OS-01, 183.3 m; South Jordan) is of Late Cretaceous age, the second one (OS-23, 256.3 m; Central Jordan) is of Eocene age. Our studies revealed that the Upper Cretaceous oil shales were deposited in a shallow-water carbonate shelf. Oyster bioherms acted as physical barriers that reduced the water circulation with the open shelf, thereby causing anoxic conditions. The Eocene oil shales also accumulated on a shallow-water carbonate shelf. In this case, however, synsedimentary tectonics caused subsiding grabens and half grabens, which in turn gave way to anoxic conditions. Both deposition and richness of the Jordanian oil shales were affected by regional sea-level fluctuations and global climatic changes.


ISSN: 1025-6059
Serial Title: GeoArabia (Manama)
Serial Volume: 20
Serial Issue: 1
Title: Depositional environment of Late Cretaceous to Eocene organic-rich marls from Jordan
Affiliation: Hashemite University, Zarqa, Jordan
Pages: 191-210
Published: 201501
Text Language: English
Publisher: Gulf Petrolink in Bahrain, Manama, Bahrain
References: 46
Accession Number: 2019-017104
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. cols., sects., 1 table, geol. sketch maps
N30°00'00" - N33°00'00", E36°00'00" - E37°30'00"
Secondary Affiliation: Ruhr University Bochum, DEU, GermanyShell International, NLD, Netherlands
Country of Publication: Bahrain
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute.
Update Code: 2019
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