“…Δ 199 Hg versus δ 202 Hg in biota (including two samples from the Site F cold seep, abbreviated as SFCS, South China Sea), sulfides, and sediments from the Indian Ocean Ridge reported in this and previous studies. 15,60 Also shown are Hg isotope values (mean ± 1SD) of chimney pieces and fluid precipitate from the Guaymas Basin (filled red-white circle), 19 Earth′s silicate crust (empty red diamond), 62 primordial mantle (red cross), 64 seawater (filled blue circle), 33,69 deep-sea (<1000 m) sediments (filled gray circle), 33,38,73,95−98 trench fauna (filled brown-yellow triangle), 38,40 and upper marine fishes (filled purple-pink triangle). 33−37 The inset shows the enlarged area of the figure, and the ellipses are used to outline the variation ranges of Hg isotopic compositions for sulfides/sediments and biota.…”