komatiite

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komatiite

[kō′mäd·ē‚īt]
(petrology)
A mantle-derived igneous rock with a high content of magnesium, particularly magnesium oxide.
References in periodicals archive ?
The Kidd-Munro sequence hosts a number of mineral deposits, including the world-class Kidd Creek volcanogenic massive sulphide deposit, the Dundonald and Alexo komatiitic nickel deposits and several major lode gold deposits.
1997: The 89 Ma Tortugal komatiitic suite, Costa Rica: Implications for a common geological origin of the Caribbean and Eastern Pacific region from a mantle plume.
Spatial and temporal variations in the geochemistry of komatiites and komatiitic basalts in the Abitibi greenstone belt.
Komatiitic lavas are assumed to crystallize from magmas that have ultramafic compositions.
Nickel-copper-cobalt with associated platinum-group elements of Voiseys Bay and Thompson-belt type as well as in layered basic intrusive rocks and komatiitic lavas
The Hattu schist belt consists of a number of bifurcating zones, several kilometers in width, which consist predominantly of epiclastic sediments and felsic to intermediate volcanics, and less voluminous tholeiitic and komatiitic rocks deposited at 2.
It may be the only region in the Abitibi greenstone belt that has nickel deposits associated with komatiitic extrusions and intrusions.
1998: Implication for the Caribbean region of the high-Mg volcanic rocks in the Costa Rica opliolitic complexes: the case of the Tortugal komatiitic like suite.
In the Gayot Lake area, Virginia Gold Mines and partner BHP Minerals discovered several Ni-Cu-PGE showings in komatiitic lavas and ultramafic intrusive rocks of the Venus volcano-sedimentary belt.
Thompson is a komatiitic type deposit, the third most important type of nickel sulphide deposit in the world.
The gold anomalies occur within volcanic rocks dominated by komatiitic to tholeiitic pillow-flows.
This vein and the associated komatiitic flow may be responsible for a unique geophysical signature located about 70m S.