The Permian-Triassic Transition in the Central Coastal Plain of Israel (North Arabian Plate Margin), David 1 Borehole

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, d 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 midto 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 humidarid climate shifts of a remote, continental source region. The last mode lies within the Milankovich band of frequencies. Negative d 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.

Triassic Foraminifera from the Great Bank of Guizhou, Nanpanjiang Basin, south China: taxonomic account, biostratigraphy, and implications for recovery from end-Permian mass extinction

“…The same problem has also occurred in the description of material from Israel. Korngreen et al (2013) mentioned the presence of P. kalhori in strata of later Early Triassic age, but these forms were not illustrated in their study. Postcladella also has been partly misidentified in Rossignol et al (2018) from northern Vietnam.…”

“…The specimen illustrated from Hydra (Greece) by Rettori et al (1994) is probably an Endoteba section. Meandrospira cheni also has been reported from the Spathian of Israel (Korngreen et al, 2013) and the northern Arab Emirates (Maurer et al, 2008).…”

“…In recent literature, the first occurrence of Hoyenella gr. H. sinensis in south China (Galfetti et al, 2008), Israel (Korngreen et al, 2013), and India (Baud and Bhat, 2014) ). The lower and upper boundaries are defined based on the first and last occurrences of Glomospirella vulgaris and Arenovidalina weii n.…”

“…8). In Israel (Korngreen et al, 2013), Kashmir Valley, India (Baud and Bhat, 2014), and south China (Galfetti et al, 2008) the first appearance of H. gr. H. sinensis also has been reported as Dienerian in successions that are well dated by conodonts.…”

The Lower Triassic platy limestone in the Jajce area (Bosnia and Herzegovina)

“…Triassic of China (Ho, 1959). Later this species was described from the Lower Triassic of the Dinarides, Carpathians, Bulgaria, Hellenides, Israel, United Arab Emirates (Salaj et al, 1983(Salaj et al, , 1988trifonova, 1993;rettori, 1995;maurer et al, 2008;Korngreen et al, 2013).…”