Gerhard Wörner

TL;DR: In this paper, the effect on magmatism of changing subduction geometry and crustal evolution of the upper continental plate during the Andean orogeny was addressed by compiling more than 1500 major and trace-element data points, and 650 Sr-, 610 Nd-, and 570 Pb-isotopic analyses of Mesozoic-Cenozoic (190-0 Ma) magmatic rocks in southern Peru and northern Chile (Central Andean Orocline), mostly from new data and the literature.

TL;DR: In this article, high precision measurements of Nb/Ta, Zr/Hf, and Lu /Hf ratios together with 176 Hf/ 177 Hf analyses on arc rocks from Kamchatka and the western Aleutians were performed to investigate the properties of HFSE in subduction regimes closer.

TL;DR: The presence of this source is explained by an influx of Pacific upper mantle into the Caribbean mantle wedge through a slab window, where the alkalic rocks form by melting of the upwelling mantle and the adakites result from melting of a leading edge of the subducted Cocos Ridge as mentioned in this paper.

TL;DR: In this article, major and trace element and Sr-Nd-Pb isotopic variations in of melting changes from >20% at the arc front to <10% below mafic volcanic rocks have been studied in a 220 km transect across the back-arc region.

TL;DR: Textural and compositional zoning in plagioclase phenocrysts in a sample from Parinacota volcano (Chile) was investigated using backscattered electron images and electron microprobe analysis of major and trace elements as discussed by the authors.