Figure 1
From: Carbon isotope evidence for large methane emissions to the Proterozoic atmosphere
Compilation of carbon concentration and isotopic composition in the Dziani Dzaha. In the water column, (a) concentration and (b) isotopic composition of dissolved inorganic carbon ([DIC] and δ13CDIC), (c) isotopic compositions of particulate organic carbon (δ13CPOC), (d) isotopic composition of dissolved methane (δ13CCH4). In the sediment columns, (e) isotopic compositions of stromatolites and sedimentary carbonates (δ13Ccarb), (f) sedimentary organic matter (δ13Corg), and (g) methane dissolved in the porewaters (δ13CCH4).
