Mantle-Derived Helium Emission near the Pohang EGS Site, South Korea: Implications for Active Fault Distribution

Figure 5

(a) ³He/⁴He ratios to distance from the Heunghae fault line. Samples at latitudes higher than P-12 are marked with red circles. (b) ³He/⁴He ratios to distance from the Namsong fault line, which is not prominent. (c) ³He/⁴He ratios to distance from closer fault lines between the Heunghae and Namsong fault lines. Samples closer to the Namsong fault than the Heunghae fault are marked with blue circles.

(a)

(b)

(c)