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The Permian-Triassic transition in the central coastal plain of Israel (north Arabian Plate margin), David 1 Borehole

Dorit Korngreen, Olga Orlov-Labkovsky, Or Bialik and Chaim Benjamini
The Permian-Triassic transition in the central coastal plain of Israel (north Arabian Plate margin), David 1 Borehole
Palaios (August 2013) 28 (8): 491-508

Abstract

A succession that includes the Permian-Triassic transition was penetrated in the David 1 Borehole (Israel), located on the Levant margin sector of the northwestern Gondwanan plate. This is a fully marine section with a complex depositional interplay of distal siliciclastic and ramp carbonate sediment. Foraminifera distribution, sedimentary microfacies, delta (super 13) C excursions and e-log (gamma-ray; resistivity) data were analyzed. The local P-T boundary is placed at the first appearance of Triassic taxa, but there is a 90 m interval of overlapping faunas where the Permian taxa are small species atypical of the underlying Permian strata, and some specimens are clearly reworked. Carbonate strata were deposited in mid- to outer-ramp environments under varying conditions of sea level, storm regime, and siliciclastic (mostly silty) influx. Sea level, tracked by facies shifts, follows a low-order cyclic pattern. Two higher orders of cyclicity are also present: a short-term oscillation in storm frequency in the local depositional basin and a high-order mode in which clastic supply alternates with clastic-free carbonates, interpreted as reflecting humid-arid climate shifts of a remote, continental source region. The last mode lies within the Milankovich band of frequencies. Negative delta (super 13) C excursions, glauconite, and pyrite-rich horizons indicate hypoxic or anoxic conditions and reflect perturbations of the global carbon system in the oceans during this time. Although lithification of the latest Permian carbonates in the transitional interval was suppressed, the state of preservation of the carbonate components is not indicative of deposition under conditions of oceanic acidification.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 28
Serial Issue: 8
Title: The Permian-Triassic transition in the central coastal plain of Israel (north Arabian Plate margin), David 1 Borehole
Affiliation: Geological Survey of Israel, Jerusalem, Israel
Pages: 491-508
Published: 201308
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
References: 152
Accession Number: 2013-082151
Categories: StratigraphyApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. cols., 1 table, geol. sketch map
N31°58'00" - N31°58'00", E34°52'00" - E34°52'00"
Secondary Affiliation: Tel-Aviv University, ISR, IsraelBen-Gurion University of the Negev, ISR, Israel
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 201348
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