Abstract
Described as the turning point in the Pangean environmental history, the Permian-Triassic boundary interval (PTBI) records major global events as biotic crisis, variations of sea level and a large volcanic activity. The increasing number of geochemical studies across the PTBI have outlined variations of unusual amplitudes. A survey of 13 tethyan sections across the PTBI (Baud et al., 1989) confirmed that the variations of ~13C values of carbonates described previously had a global character. The most detailed geochemical study across a Permian-Triassic boundary section has been carried out on the Gartnerkofel core, Southern Alps (papers in Holser and Sch6nlaub, 1991) with three main objectives: the calibration of the 813Ccarb and ~13Corg curves, the research of rare earth and Ir anomalies and the analysis of anoxia. Among the reviews on the Permian-Triassic boundary that consider geochemical data, the most recent one has been published by Hallam and Wignall (1997). The goal of the present note is to review the most recent literature and to discuss the use of geochemistry in problems related to the PTBI.
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