Phase relations of a high-Mg basalt from the Aleutian Island arc - Implications for primary island arc basalts and high-Al basalts

An experimental investigation of a primitive high-Mg basalt, MK-15, collected from lava flows of the Unalaska Island in the Aleutian Island arc has been conducted in order to study primary and parental island arc basalts and the development of island arc magmas. The results suggest a model in which...

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Main Authors: Gust, D. A., Perfit, M. R.
Format: Other/Unknown Material
Language:unknown
Published: 1987
Subjects:
46
Aleutian Island
Online Access:http://ntrs.nasa.gov/search.jsp?R=19880045633
id ftnasantrs:oai:casi.ntrs.nasa.gov:19880045633
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spelling ftnasantrs:oai:casi.ntrs.nasa.gov:19880045633 2023-05-15T13:14:40+02:00 Phase relations of a high-Mg basalt from the Aleutian Island arc - Implications for primary island arc basalts and high-Al basalts Gust, D. A. Perfit, M. R. Unclassified, Unlimited, Publicly available JAN 1, 1987 http://ntrs.nasa.gov/search.jsp?R=19880045633 unknown http://ntrs.nasa.gov/search.jsp?R=19880045633 Accession ID: 88A32860 Copyright Other Sources 46 Contributions to Mineralogy and Petrology; 97; 7-18 1987 ftnasantrs 2012-02-15T17:35:37Z An experimental investigation of a primitive high-Mg basalt, MK-15, collected from lava flows of the Unalaska Island in the Aleutian Island arc has been conducted in order to study primary and parental island arc basalts and the development of island arc magmas. The results suggest a model in which high-Al basalts are generated by moderate amounts of crystal fractionation from more primitive (high Mg/Mg + Fe, lower Al2O3) basaltic magmas near the arc crust-mantle boundary. Somewhere between 20-30 depth, significant amounts of clinopyroxene and olivine, with lesser amounts of spinel and possibly amphibole, fractionate, forming layer of olivine-clinopyroxenite at the base of the arc crust. Other/Unknown Material Aleutian Island NASA Technical Reports Server (NTRS)
institution Open Polar
collection NASA Technical Reports Server (NTRS)
op_collection_id ftnasantrs
language unknown
topic 46
spellingShingle 46
Gust, D. A.
Perfit, M. R.
Phase relations of a high-Mg basalt from the Aleutian Island arc - Implications for primary island arc basalts and high-Al basalts
topic_facet 46
description An experimental investigation of a primitive high-Mg basalt, MK-15, collected from lava flows of the Unalaska Island in the Aleutian Island arc has been conducted in order to study primary and parental island arc basalts and the development of island arc magmas. The results suggest a model in which high-Al basalts are generated by moderate amounts of crystal fractionation from more primitive (high Mg/Mg + Fe, lower Al2O3) basaltic magmas near the arc crust-mantle boundary. Somewhere between 20-30 depth, significant amounts of clinopyroxene and olivine, with lesser amounts of spinel and possibly amphibole, fractionate, forming layer of olivine-clinopyroxenite at the base of the arc crust.
format Other/Unknown Material
author Gust, D. A.
Perfit, M. R.
author_facet Gust, D. A.
Perfit, M. R.
author_sort Gust, D. A.
title Phase relations of a high-Mg basalt from the Aleutian Island arc - Implications for primary island arc basalts and high-Al basalts
title_short Phase relations of a high-Mg basalt from the Aleutian Island arc - Implications for primary island arc basalts and high-Al basalts
title_full Phase relations of a high-Mg basalt from the Aleutian Island arc - Implications for primary island arc basalts and high-Al basalts
title_fullStr Phase relations of a high-Mg basalt from the Aleutian Island arc - Implications for primary island arc basalts and high-Al basalts
title_full_unstemmed Phase relations of a high-Mg basalt from the Aleutian Island arc - Implications for primary island arc basalts and high-Al basalts
title_sort phase relations of a high-mg basalt from the aleutian island arc - implications for primary island arc basalts and high-al basalts
publishDate 1987
url http://ntrs.nasa.gov/search.jsp?R=19880045633
op_coverage Unclassified, Unlimited, Publicly available
genre Aleutian Island
genre_facet Aleutian Island
op_source Other Sources
op_relation http://ntrs.nasa.gov/search.jsp?R=19880045633
Accession ID: 88A32860
op_rights Copyright
_version_ 1766264830635802624

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