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Fig. 7 | Progress in Earth and Planetary Science

Fig. 7

From: Authigenic carbonate precipitation at the end-Guadalupian (Middle Permian) in China: Implications for the carbon cycle in ancient anoxic oceans

Fig. 7

Relationship between the δ13CDIC value and calcite saturation index (Ω) of the waters generated by mixing of the initial seawater (SW i ) with the seawaters in which sulfate reduction occurred (SW1, SW2, SW3) (Fig. 6). The mixing ratios of SW x to SW i (x = 1, 2, 3) are 0 to 0.5, and the tick marks on each curve represent the ratios; 0.1, 0.2, 0.3, 0.4, and 0.5 from right to left on each curve. The arrows represent the main ranges of δ13Ccarb values of randomly oriented and bundled calcites (right) and of packed calcites (left)

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