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DEPOSITIONAL ENVIRONMENTS AND SOURCE ROCK POTENTIAL OF THE JURASSIC KIDOD SHALES, ISRAEL
Author(s) -
Bein Amos,
Binstock Ruth
Publication year - 1985
Publication title -
journal of petroleum geology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 42
eISSN - 1747-5457
pISSN - 0141-6421
DOI - 10.1111/j.1747-5457.1985.tb01010.x
Subject(s) - geology , sedimentary depositional environment , kerogen , source rock , facies , provenance , geochemistry , mineralogy , oil shale , paleontology , structural basin
The Jurassic Kidod shales, which reach a thickness of up to 300 m., are found throughout the subsurface of central Israel at depths ranging from 1,200 m to over 2,300 m. Data derived from the study of bitumen and kerogen extracted from these shales were used to evaluate its source potential and depositional regime. Methods used included liquid and gas chromatography, microanalysis, δ 13 C determination, U V spectroscopy, electron spin resonance (ESR), thermal analysis (DTA and GTA), pyrolysis and vitrinite reflectance. The data indicate that the shales were deposited in a normal open‐shelf environment under oxic conditions. This conclusion, considered with the thickness trends of the shales and their diachronous progradation from west to east, points to a marine rather than, as previously proposed, a fluvio‐deltaic provenance for the shales. The implication of this interpretation is that truncation rather than lateral facies relationships accounts for the abrupt termination of the shales to the west over the north‐soth trending sturctural highs of Be'eri–Helez–Ashdod. From quantitative source‐rock evaluation a reasonable source potential is assumed. The presence of significant volumes of exploitable oil derived from the Kidod shales is, however most unlikely, because of its low maturation stage.