Fig. 8: Geochemical data from Otto Creek, Sverdrup Basin, Arctic Canada. | Communications Earth & Environment

Fig. 8: Geochemical data from Otto Creek, Sverdrup Basin, Arctic Canada.

From: Continental weathering and recovery from ocean nutrient stress during the Early Triassic Biotic Crisis

Fig. 8: Geochemical data from Otto Creek, Sverdrup Basin, Arctic Canada.The alternative text for this image may have been generated using AI.

Geochemical profiles show variations in carbon isotopes (δ13Corg), total organic carbon (TOC), carbon/sulfur (C/S) ratio, and nitrogen isotopes (δ15N), and are placed in relative time sequence. K-Ar ages of cluster 3 (see Fig. 7) across the LPE and the Late Triassic (221.3 Ma) are shown. The stippled vertical green line indicates C/S ratio ~1 used to define relative changes in the redox state of the Sverdrup Basin. Prevalence of phosphate nodules are indicated5. Stratigraphic sub-units are marked by stippled lines. L.Pr. late Permian, Cha. Changhsingian, Ind. Induan.

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