Boninite is an extrusive rock high in both magnesium and silica, thought to be usually formed in fore-arc environments, typically during the early stages...

of basaltic composition, although pillows formed of komatiite, picrite, boninite, basaltic andesite, andesite, dacite or even rhyolite are known. In general...

Basanite – Type of volcanic rock Blairmorite – Rare porphyritic volcanic rock Boninite – Ultramafic extrusive rock high in both magnesium and silica Carbonatite –...

group, the main composition of eruptions in the Matas consists of mostly boninite, which is a type of extrusive rock usually seen in the Izu-Bonin Island...

such as picritic basalt, komatiite, and highly magnesian magmas that form boninite, take the composition and temperatures to the extreme. All have a silica...

series and are characteristic of volcanic arcs above subduction zones. Boninite is a high-magnesium form of basalt that is erupted generally in back-arc...

boninite-like amphibolites have been interpreted to represent metamorphosed boninites. However, subsequent studies have pointed out that the boninite-like...

Ultramafic lavas, such as komatiite and highly magnesian magmas that form boninite, take the composition and temperatures of eruptions to the extreme. All...

Deschamps, A.; Lallemand, S. (2003). "Geodynamic setting of Izu-Bonin-Mariana boninites". In Larter, R.D.; Leat, P.T. (eds.). Intra-Oceanic Subduction Systems:...

basalt Basaltic trachyandesite Mugearite Shoshonite Basanite Blairmorite Boninite Carbonatite Charnockite Enderbite Dacite Diabase Diorite Napoleonite Dunite...

subduction zones. Boninite magmatism is similar to komatiite magmatism but is produced by fluid-fluxed melting above a subduction zone. Boninites with 10–18%...

ago. The Bonins are mostly composed of an andesitic volcanic rock called boninite, rich in magnesium oxide, chromium, and silicon dioxide. They may represent...

equilibrium with the melt in which they are found. High-magnesium andesites (boninites) in island arcs may be primitive andesites, generated from metasomatized...

Matthew and Hunter islands have unusual high-Mg andesitic to dacitic and boninite lavas. These unusual lavas have also been found from a number of seamounts...

Sherman H.; Hawkins, James W. (1987). "Petrology and geochemistry of boninite series volcanic rocks from the Mariana trench". Contributions to Mineralogy...

adakites are distinct from another variety of high-Mg andesite called boninite; boninites have major element concentrations similar to sanukitoids, but they...

in titanium, with more than 8% MgO and less than 0.5% TiO2, is termed a boninite. Basaltic andesite is found in volcanic arcs, such as those of Central...

Benmoreite: Ben More (Mull), Scotland Blairmorite: Blairmore, Alberta, Canada Boninite: Bonin Islands, Japan Comendite: Comende, San Pietro Island, Sardinia Cummingtonite:...

The Stavely Zone in Victoria is a boninite to MORB basalt terrane considered to have been connected with the boninites the Mount Read Volcanics of Northern...

years ago, and is composed mostly of an andesitic volcanic rock called boninite, which is rich in magnesium oxide, chromium, and silicon dioxide. The Ogasawara...

BP during glaciation.: 128  The bedrock of the mountain is composed of boninite in an ophiolite complex.: 19  The toponym "Mont Ham Regional Park" is linked...

much more mafic in composition. Rarer magmas such as high-Mg andesite and boninite can be observed, as well as the more common basalts, andesites and dacites...

olivine-bearing basalt composition, pointing to the products being mostly boninite which complies with past research in the area. No historical eruptions...

created by two tholeiitic magmatic episodes, and is divided by a layer of boninite. The older and lower layers are therefore intruded by the younger evolved...

with olivine at low pressure in magma that is high in both MgO and SiO2 (boninites). At pressures greater than 5 kilobars (0.5 GPa, or 5000x atmospheric...

southern India such as ultramafic komatiites, high-Mg basalts, anorthosites, boninites, adakites, Nb-rich basalts, grey-wakes, banded iron and manganese formations...