Major sulfur cycle perturbations in the Panthalassic Ocean across the Pliensbachian-Toarcian boundary and the Toarcian Oceanic Anoxic Event

More gaps than record! A new look at the Pliensbachian/Toarcian boundary event guided by coupled chemo-sequence stratigraphy

“…This transgression is accompanied by a positive excursion of δ 13 C org value. Such positive carbon isotope shift is usually interpreted to reflect enhanced organic matter burial on a global scale (Scholle and Arthur, 1980), in agreement with sulfur isotope record from Japan which implies increased marine organic matter and pyrite burial during the Pl/To event (Chen et al, 2022). No peculiar enrichment in TOC is however observed in the European reference sections of Peniche (Fantasia et al, 2019), in the Mochras core (Storm et al, 2020), or in Morocco (e.g., Bodin et al, 2010;Ait-Itto et al, 2017; see also Fig.…”