Crustal constraints on the surface expression of mantle upwelling in a back-arc passive margin setting.

ABSTRACT: Passive margins offer valuable insights into the interplay between tectonic processes and surface elevation, as topographic signals are often preserved under long-term tectonic quiescence. Gangwon Province, located in the mid-eastern Korean Peninsula, exemplifies such a setting, shaped by back-arc opening of the East Sea (Sea of Japan). Here, we present Vp/Vs ratios, residual topography, and high-resolution S-wave crustal velocity models from joint inversion of teleseismic receiver functions and Rayleigh-wave dispersion curves. Our results reveal low S-wave velocities and high Vp/Vs ratios throughout the crust beneath the coastal region, suggesting shallow-reaching thermal effects from mantle upwelling. In contrast, west of the Taebaek Mountain Range, low velocities are confined to the low

SUBMITTER: Hwang JY 

PROVIDER: S-EPMC12578918 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature