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Komatiites are fascinating volcanic rocks. They are among the most ancient lavas of the Earth following the 3.8 Ga pillow basalts at Isua and they represent some of the oldest ultramafic magmatic rocks preserved in the Earth's crust at 3.5 Ga.
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Komatiites were first discovered by Richard and Morris Viljoen in the Barberton greenstone belt of South Africa and proposed as a new class of ultramafic volcanic rock with >18 wt% MgO. Komatiites are in places associated with spinifex textures (elongated bladed and plumose olivine crystals).
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Komatiites are ultra-hot ultramafic lavas, largely restricted to the Archaean. They represent an extreme endmember of terrestrial magmatism and challenge our understanding …
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Komatiites are ultramafic volcanic rocks that occur mainly in Archean and Paleoproterozoic greenstone belts. These olivine-rich rocks are assumed to have crystallized from magmas that have about...
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Komatiite, mainly of Archean and Proterozoic age, derived from high degrees of partially melted mantle at extremely high temperatures and very low viscosity, are significant targets for magmatic sulfide mineralization. Volcanic rocks contain high MgO and …
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Komatiites were first discovered by Richard and Morris Viljoen in the Barberton greenstone belt of South Africa and proposed as a new class of ultramafic volcanic rock with …
WhatsApp: +86 18221755073
Komatiites are ultra-hot ultramafic lavas, largely restricted to the Archaean. They represent an extreme endmember of terrestrial magmatism and challenge our understanding of how mantle melting...
WhatsApp: +86 18221755073
Komatiites are rare, ultra-high-temperature (∼1,600 °C) lavas that were erupted in large volumes 3.5–1.5 bya but only very rarely since. They are the signature rock type of a hotter early Earth. However, the hottest, most extensive komatiites have a ...
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Komatiites are rare, ultra-high-temperature (∼1,600 °C) lavas that were erupted in large volumes 3.5–1.5 bya but only very rarely since. They are the signature rock type of a hotter early Earth. …
WhatsApp: +86 18221755073
Komatiite ( ) is a type of ultramafic mantle-derived volcanic rock defined as having crystallised from a lava of at least 18 wt% MgO. Komatiites have low silicon, potassium and aluminium, …
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The distinct Commondale rock units include olivine cumulate, platy olivine spinifex, dendritic-textured olivine, orthopyroxene spinifex, finely layered varieties of these rock types and very fine-grained aphyric rock-types. Olivine is the cumulate phase and …
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Komatiite, mainly of Archean and Proterozoic age, derived from high degrees of partially melted mantle at extremely high temperatures and very low viscosity, are significant targets for …
WhatsApp: +86 18221755073
Fig.1: Variations in texture across a several metre-thick komatiite flow, showing well developed layering. Modified from Dostal, J. (2008).
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whole-rock geochemical data are presented on the Patka komatiite of the BGGB and discuss their implication on the post-magmatic alteration processes, crustal contamination besides drawing …
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Komatiite ( ) is a type of ultramafic mantle-derived volcanic rock defined as having crystallised from a lava of at least 18 wt% MgO. Komatiites have low silicon, potassium and aluminium, and high to extremely high magnesium content.
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whole-rock geochemical data are presented on the Patka komatiite of the BGGB and discuss their implication on the post-magmatic alteration processes, crustal contamination besides drawing hypothesis on possible geodynamic setting and composition of the mantle source. Geological setting of the Singhbhum Craton and the area of study
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Komatiite is an ultramafic, high-magnesian volcanic rock typical of a spinifex texture originated during fast cooling of a silicate melt enriched in olivine and other Mg-Fe silicates. Komatiites occur only in Archean terranes.
WhatsApp: +86 18221755073
The distinct Commondale rock units include olivine cumulate, platy olivine spinifex, dendritic-textured olivine, orthopyroxene spinifex, finely layered varieties of these rock types …
WhatsApp: +86 18221755073
Komatiites are ultramafic volcanic rocks that occur mainly in Archean and Paleoproterozoic greenstone belts. These olivine-rich rocks are assumed to have crystallized …
WhatsApp: +86 18221755073
