Samples	CH4 (ppb)	dD	dD_stdev	d13C 	d13C_stdev
J0835	1790.5	-67	0.35	n.m.	n.m.
J1158	2050.1	-100	2.08	-48.17	0.07
45-J1530	1880.5	-82	3.80	n.m.	n.m.
J0802	1784.6	-68	0.20	n.m.	n.m.
J0803	1790.3	-63	5.88	n.m.	n.m.
45-J1529	1894.6	-74	1.07	-48.36	0.07
J594	1913.5	-79	0.89	-48.30	0.07
45-J1420	1819.7	-68	3.19	-46.90	0.07
45-J1531	1871.3	-76	0.37	-47.94	0.07
45-J1537	1908.8	-89	3.44	-48.10	0.07
J0838	1808.4	-70	0.65	n.m.	n.m.
45-J1517	1812.2	-75	0.41	n.m.	n.m.
J0875	1818.1	-75	3.40	n.m.	n.m.
45-J1347	1798.4	-73	6.36	n.m.	n.m.
45-J1431	1826.0	-78	7.07	n.m.	n.m.
45-J1337	1827.9	-77	7.03	n.m.	n.m.
45-J1418	1779.6	-68	4.24	n.m.	n.m.
45-J0516	1828.0	-71	4.59	n.m.	n.m.
45-J1410	1803.3	-63	1.76	n.m.	n.m.
n.m.: not measured