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 2.7 Ga Abitibi greenstone belt.
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.
According to University of Hawaii geochemist Ken Rubin, the active boninite eruption provides a unique opportunity to study magma formation at volcanoes, and to learn more about how Earth recycles material where one tectonic plate is subducted under another.
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)
A., 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
Boninites have a distinctive mineralogy and chemistry that requires their initial crystallization from melts at high temperatures (1,250 |degrees~ to 1,300 |degrees~ C) and shallow depths (3 to 10 kilometers)--conditions similar to spreading centers.
Island arcs, deep-sea trenches, and back-arc basins
Sun and Nesbitt (1978) discussed the origin of low-Ti basalts (later referred to as boninites by Cameron et al.
Igneous Rock Associations 9. Ophiolites 1: from the beginning to modern times
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