Andean Magmatism: Chemical and Isotopic Constraints

ISBN-13: 9781468473377 / Angielski / Miękka / 2012 / 252 str.

Harmon/Barreiro

Opis

Whether this contamination is introduced at source by subduction-related processes or occurs during magma transit by bulk anatexis and magma mixing, selective contamination or coupled fractional crystallization-assimilation mechanisms is central to most current discussions of andesite petrogenesis.

Spis treści

Section 1: Volcanic Andes.- The tectonic setting of active Andean volcanism.- Oxygen isotope ratios in Late Cenozoic Andean volcanic.- Lead isotopes and Andean magmagenesis.- Isotope and trace element data for orogenic andesites from the Austral Andes.- Petrology and chemistry of volcanic rocks of the Southern Andes.- Geochemical variations in volcanic rocks from central-south Chile (33–42°S).- Sr, Nd, Pb and O isotope composition of Late Cenozoic volcanics, northernmost SVZ (33–34°S).- The Cerro Purico shield complex, north Chile.- Quantitative models for crustal contamination in the central and northern Andes.- Correlated Sr isotope and geochemical variations in basalts and basaltic andesites from Guatemala.- Section 2: Plutonic Andes.- Phanerozoic plutonism in the Peruvian Andes.- The Coastal Batholith of Peru.- Lead isotope systematics in batholithic rocks of the Western and Coastal Cordilleras, Peru.- Geochemical characteristics of the Late Mesozoic Andean volcanic.- The magmatic evolution of the Cordillera Oriental, southeastern Peru.- Geochemical characteristics of magmatism in the Southern Andes (45–46°S).- References.