Clumped isotope signatures of methane seep carbonate distributed from 0 to 120 meters bellow seafloor in the Japan Sea

抄録

Carbonate from two sediment cores, M02RB (ca. 100m, Mogami Trough) and J04RB (ca. 120m, Joetsu Knoll) were analyzed using a Thermo Scientific MAT253 mass spectrometer. Applying a laboratory-specific calibration, the formation temperatures of carbonates from M02RB varied from -1.4°C to 8.7°C, with an average value of 2.5±1.2°C (n=9); while those from J04RB varied from -6.7°C to 3.8°C, with an average value of -1.8±1.1°C (n=10).