@article{TER:TER12237,
author = "Magdalena Blum-Oeste and Gerhard W{\"o}rner",
abstract = "The geochemical character of primary magmas and the nature of crustal melts remain poorly constrained at the active continental margin of the Central Andes, where the crustal thickness is >70 km. We identify three end-members and constrain their full major and trace element compositions by polytopic vector analysis (PVA). The end-members include two mafic parent magmas: (1) a slightly evolved calcalkaline basaltic andesite derived from the fluid-fluxed mantle wedge that is typical of the Andes in general and (2) a strongly LREE-enriched basalt akin in its trace element pattern to back-arc shoshonites. (3) The third end-member is a variably HREE-depleted rhyodacite representing partial melts of lower to middle crustal lithologies. We propose that these end-members are ubiquitous and typical of such thick-crust settings, and can explain – in highly variable mixing proportions – the entire compositional range of Central Andean magmatism.",
doi = "10.1111/ter.12237",
issn = "1365-3121",
journal = "Terra Nova",
number = "6",
pages = "434--440",
title = "{C}entral {A}ndean magmatism can be constrained by three ubiquitous end-members",
url = "http://dx.doi.org/10.1111/ter.12237",
volume = "28",
year = "2016",
}