Fig. 2: Chemostratigraphy of Katsuyama.
From: Mercury evidence for combustion of organic-rich sediments during the end-Triassic crisis
a mercury concentration (Hg, ppb); b total organic carbon (TOC, %, red triangle) and ratio of Hg to TOC (Hg/TOC, ppb/%, open circles); c total sulfur (TS, %, red triangle) and ratio of Hg to TS (Hg/TS, ppb/%, open circles); d thorium concentration (Th, ppm, red triangle) and ratio of Hg to Th (Hg/Th, ppb/ppm, open circles); e mass-independent fractionation of odd-Hg isotopes (Δ199Hg,‰); and f mass-independent fractionation of even-Hg isotopes (Δ200Hg,‰). The gray field represents the mercury-enriched interval (MEI), the vertical rectangle in e is volcanic Δ199Hg values (+0.02 ± 0.06‰71), and the vertical rectangle in f is Δ200Hg values of 0 ± 0.05‰71. Biozonation from references40,59. Horizontal bars in the Δ199Hg and Δ200Hg profiles are standard deviation (2σ) values. Abbreviations: Sy = System, St = (sub)stage, R = radiolarian zone, C = conodont zone; H. = Haeckelicyrtium, Gl. = Globolaxtorum, Mi. = Misikella. Source data are provided in the Supplementary data file.
