Fig. 2: Spatial variations of fluid He and C isotopes in the SETP and adjacent region.
From: Linking deeply-sourced volatile emissions to plateau growth dynamics in southeastern Tibetan Plateau
a Plot of log(3He/4He) versus distance to the IACB (km) for the TRF, LTF, XSHF, and SB samples. b Plot of log(3He/4He) versus distance to the IACB (km) for the TCV, SMV, AXF, and BF & RRF samples. c Plot of δ13C–CO2 versus distance to the IACB (km) for the TRF, LTF, XSHF, and SB samples. d Plot of δ13C-CO2 versus distance to the IACB (km) for the TCV, SMV, AXF, and BF & RRF samples. Abbreviations of sample groups are given in the main text. Filled and open symbols represent samples in this study and literature, respectively. The Sichuan basin samples (black square with white cross—samples in this study; black cross—samples in literature) are shown for comparison with samples of the SETP. Gray shaded areas in a and b represent 1–13% mantle contributions to He inventory based on crust-mantle mixing calculation (Supplementary Information). Gray shaded areas in c and d represent the reference δ13C range of depleted MORB (mid-ocean ridge basalts) mantle and sedimentary carbonate rocks.
