boninite


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boninite

[′bän·ə‚nīt]
(petrology)
An andesitic rock that contains much glass and abundant phenocrysts of bronzite and less of olivine and augite.
References in periodicals archive ?
This ophiolite includes magmas from MORB to Boninite and suggest that it was formed in an arc/back arc system.
CIAO: Central Iran Amphibole-bearing Ophiolite
1998) hypothesized an arc setting for the boninite series rocks from this belt of Canada.
1998): Boninite series: low Ti-tholeiite associations from the 2.
New computer program TecD for tectonomagmatic discrimination from discriminant function diagrams for basic and ultrabasic magmas and its application to ancient rocks/Nuevo programa informatico TecD para la discriminacion tectonomagmatica basada en diagramas de funciones discriminantes para magmas basicos y ultrabasicos y su aplicacion a rocas antiguas
Rocks snatched from the volcano include boninite lavas, a chemically distinct type of lava previously found only around extinct volcanoes that erupted more than 1 million years ago.
Sub records volcano video
The West Mata Volcano is producing boninite lavas, believed to be among the hottest on Earth in modern times, and a type seen before only on extinct volcanoes more than one million years old.
Scientists discover deepest undersea erupting volcano below Pacific Ocean
1989) Geological setting, petrology and geochemistry of Cambrian boninite and low-Ti tholeiite lavas in western Tasmania.
The Lord Brassey Mine, Tasmania. (Famous Mineral Localities)
Swarms of these dikes are exposed in the Bonin Islands, and one lava type from this environment, boninite, was named for the islands.
Island arcs, deep-sea trenches, and back-arc basins
This area hosts a band of low titanium tholeiite and boninite mafic volcanic rocks believed to have been emplaced in high heat flow rifting environments, important for the formation of massive sulphide deposits.
Beaufield Gets Positive Exploration Results in Falconbridge Beaufield Troilus Exploration Program
Subsequently Stern and Bloomer (1992) established a link between initiation of subduction, boninite production and ophiolite formation.
Igneous Rock Associations 9. Ophiolites 1: from the beginning to modern times
1983, Boninite petrogenesis: chemical and Nd-Sr isotopic constraints: Earth and Planetary Science Letters, v.
Igneous rock associations 8. Arc magmatism II: geochemical and isotopic characteristics
Geochemical analyses show that the schist is a high-Ca boninite (high-Mg andesite to basalt).
Emerald and aquamarine mineralization in Canada
Because some Archean komatiites are associated with calc-alkaline volcanic rocks and boninites, Grove and Parman (2004) argued that like recent boninites, komatiites may result from wet melting above a subduction zone.
Igneous rock associations 10. Komatiites
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