Andesites in island arcs and continental margins: relationship to crustal evolution

Journal Article · Sun Jan 01 04:00:00 EST 1978 · Bull. Volcanol.; (Italy)

DOI:https://doi.org/10.1007/BF02597382· OSTI ID:6919731

Eichelberger, J C

Andesites of both island arc and continental margin environments contain petrologic evidence of mixing of mantle and crustal melts. Andesitic volcanism appears to involve addition of mantle-derived basaltic magma to the crust and fractionation of preexisting crustal material. Changes in andesitic volcanism with increasingly continental character of the crust reflect changes in a rhyolitic component derived from increasingly aged and fractionated crust. The initial stage in development of continental crust is partial melting of oceanic crust.

• Research Organization: Univ. of California, Los Alamos, NM
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6919731
• Journal Information: Bull. Volcanol.; (Italy), Journal Name: Bull. Volcanol.; (Italy) Vol. 41:4; ISSN BUVOA
• Country of Publication: Italy
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150200* -- Geology & Hydrology of Geothermal Systems
58 GEOSCIENCES
580100 -- Geology & Hydrology-- (-1989)
ANDESITES
CHEMICAL ANALYSIS
CONTINENTAL MARGIN
EARTH CRUST
EARTH MANTLE
ELECTRON MICROPROBE ANALYSIS
GEOLOGIC MODELS
GEOLOGY
IGNEOUS ROCKS
LAVA
MAGMA
MICROANALYSIS
MIXING
OCEANIC CRUST
ORIGIN
PETROLOGY
RHYOLITES
ROCKS
VOLCANIC ROCKS
VOLCANISM