Constraining the sub-arc, parental magma composition for the giant Altiplano-Puna Volcanic Complex, northern Chile.

ABSTRACT: The Andean continental arc is built upon the thickest crust on Earth, whose eruption products reflect varying degrees of crustal assimilation. In order to robustly model magma evolution and assimilation at subduction zones such as the Andes, the compositions of parental magmas feeding crustal magma reservoirs need to be defined. Here we present new olivine and clinopyroxene oxygen isotope data from rare mafic volcanic rocks erupted at the margins of the giant Altiplano-Puna Magma Body (APMB) of the Altiplano-Puna Volcanic Complex, Central Andes. Existing olivine and pyroxene δ¹⁸O values for the Central Andes are highly variable and potentially not representative of sub-arc parental compositions. However, new olivine (n = 6) and clinopyroxene (n = 12) δ¹⁸O values of si

SUBMITTER: Gonzalez-Maurel O 

PROVIDER: S-EPMC7176692 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature