Magnetotelluric support for edge-driven convection and shear-driven upwelling in the Newer Volcanics Province.

ABSTRACT: Intraplate volcanic provinces present significant natural hazards to many populated regions globally but their origins are poorly understood. Though hypotheses involving mantle plumes are predominant, the Newer Volcanics Province of southeast Australia-a relatively young (< 4.5 Ma), EW trending collection of over 400 volcanic centres-is increasingly attributed to some combination of edge-driven convection (EDC) and shear-driven upwelling (SDU). In this paper, we provide magnetotelluric (MT) data in support of these geodynamic processes. Three-dimensional inversion of 49 new broadband MT sites, in combination with 143 previously collected broadband, long-period, and geomagnetic depth soundings, reveals an elongate zone of moderately low resistivity (∼ 10-300 Ω m) spanning the Mt Gambier sub

SUBMITTER: Jennings S 

PROVIDER: S-EPMC10073071 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature