A re-evaluation of the peak P-T conditions of eclogite-facies metamorphism of the Paleozoic Acatlan Complex (Mexico) reveals deeper subduction.

ABSTRACT: Eclogites in the Acatlán Complex, southern Mexico, record the subduction history of the complex. Previous studies indicate that the proto-Acatlán Complex reached < 50 km depth during subduction. Yet, a recent study reported higher pressures for a single eclogite, questioning the maximum depth reached by the complex during subduction. In this work, I re-calculate eclogite pressure and temperature (P-T) conditions using thermobarometric methods applicable to eclogite-facies mafic rocks to a set of eclogites cropping out throughout the high-pressure belt of the Acatlán Complex-the Piaxtla Suite. I find that Acatlán eclogites record substantially-and systematically-greater pressures than previously reported. Calculations show that eclogites from the central part of the Piaxtla Suite (in the Pi

SUBMITTER: Hernandez-Uribe D 

PROVIDER: S-EPMC9741601 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature