Fig. 5
From: Timing and origin of natural gas accumulation in the Siljan impact structure, Sweden
U-Pb carbonate dating. a VM2:170, two generations of 13C-rich calcite in limestone fracture, yielding ages 80 ± 5 Ma and 39 ± 3 Ma. b VM2:212 13C-rich calcite in limestone fracture, yielding 22.2 ± 2.5 Ma. c CC1:537, 13C-rich calcite, in granite fracture, yielding 39.2 ± 1.4 Ma. d VM2:442, 13C-rich calcite in granite fracture, yielding 65 ± 10 Ma. e VM1:255, 13C-depleted calcite in granite fracture (targeting the growth zones with dark BSE-intensity in Fig. 2n), yielding 37.7 ± 1.9 Ma, with an older potential event 464 ± 60 Ma (highly uncertain: only three data points). Errors represented by the ellipses are 2σ
