Methane Source and Turnover in the Shallow Sediments to the West of Haima Cold Seeps on the Northwestern Slope of the South China Sea

Table 5

Fractions of DIC from different sources contributed to the total DIC pool and δ¹³C values from different sources.

Core ID	δ^13CSMTZ (‰, VPDB)	δ^13Cex (‰, VPDB)	δ^13CSW (‰, VPDB)	δ^13COM (‰, VPDB)	(%)	(%)	(%)	(%)	δ^13Cmethane (‰, VPDB)
CL30	-46.4	-48.1	0	-20	9.8	6.6	28.0	55.5	-74.1
CL44	-41.0	-46.1	0	-20	9.8	5.3	34.3	50.6	-75.4
CL47	-38.8	-43.1	0	-20	8.7	5.2	32.9	53.1	-66.7