Basalts, andesites, dacites and rhyolites from Nevados de Chillan and Antuco stratovolcanoes (southern Andes): a remarkable example of magmatic differentiation through crystal fractionation

Authors
Deruelle, B Lopez-Escobar, L
Citation
B. Deruelle et L. Lopez-escobar, Basalts, andesites, dacites and rhyolites from Nevados de Chillan and Antuco stratovolcanoes (southern Andes): a remarkable example of magmatic differentiation through crystal fractionation, CR AC S IIA, 329(5), 1999, pp. 337-344
Citations number
17
Categorie Soggetti
Earth Sciences
Journal title
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE A-SCIENCES DELA TERRE ET DES PLANETES
ISSN journal
12518050 → ACNP
Volume
329
Issue
5
Year of publication
1999
Pages
337 - 344
Database
ISI
SICI code
1251-8050(19990915)329:5<337:BADARF>2.0.ZU;2-T
Abstract
The Nevados de Chillan and Antuco stratovolcanoes (36 degrees-37 degrees S, southern Andes) erupt high-Al basalts, andesites, dacites and rhyolites. T he lava series has no indication of contamination by the continental crust. Therefore, its differentiation is very well explained by crystal fractiona tion of the mineral phases present as phenocrysts (plagioclase, olivine, cl inopyroxene, orthopyroxene, magnetite, ilmenite and apatite), taking into a ccount major and trace elements. A fractionation model is presented here. ( C) 1999 Academie des sciences.