Fig. 2: N2-He-Ar ternary plot.
From: Latent magmatism beneath the Korean Peninsula caused by asthenosphere upwelling

MORB and ASW refer to Mid-Ocean Ridge Basalts and Air-Saturated Water, respectively. Reference values are from Gyeonju, Ulsan, and Busan in South Korea22 (white squares), Pohang in South Korea23 (dark gray squares), and global continental rift gases12 (light gray squares). All of the following figures use the same symbols.