Exhumation and tectonic history of inaccessible subglacial interior East Antarctica from thermochronology on glacial erratics.

ABSTRACT: The geology, tectonic history and landscape evolution of ice-covered East Antarctica are the least known of any continent. Lithic boulders eroded from the continental interior and deposited in glacial moraines flanking the Transantarctic Mountains provide rare constraints on the geological history of central interior East Antarctica. Crystallization ages and ice velocities indicate these glacial erratics are not sourced locally from the Transantarctic Mountains but rather originate from the continental interior, possibly as far inland as the enigmatic Gamburtsev Subglacial Mountains. We apply low-temperature thermochronology to these boulders, including multi-kinetic inverse thermal modeling, to constrain a multi-stage episodic exhumation history. Cambro-Ordovician and Jurassic rapid-cooli

SUBMITTER: Fitzgerald PG 

PROVIDER: S-EPMC9584882 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature