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Komatiite /koʊˈmɑːtiˌaɪt/ is a type of
ultramafic mantle-derived
volcanic rock
defined as
having crystallised from a lava of at
least 18 wt% magnesium...
- entrail-type
pahoehoe lavas on land.
Ultramafic magmas, such as
picritic basalt,
komatiite, and
highly magnesian magmas that form boninite, take the composition...
- iron-nickel-copper-platinum-group
element ore
deposit in
which the
physical processes of
komatiite volcanology serve to deposit,
concentrate and
enrich a Fe-Ni-Cu-(PGE)...
-
continental shields do not
contain enough komatiite to
match the
expected depletion.
Either much of the
komatiite never reached the surface, or
other processes...
- The
Winnipegosis komatiite belt is a 150 km (93 mi) long and 30 km (19 mi) wide
greenstone belt
located in the Lake
Winnipegosis area of
central Manitoba...
- tectonics, and
allowing the
production of
uncommon igneous rocks such as
komatiites that are
rarely formed today. The mean heat loss from
Earth is 87 mW/m2...
-
Widgiemooltha Komatiite is a
formation of
komatiite in the
Yilgarn Craton of
Western Australia. The
stratigraphy of the
Widgiemooltha Komatiite is well known...
- + K2O (up to 3% by weight). They
include picrite,
komatiite and meimechite.
Picrites and
komatiites are
somewhat similar chemically (defined as >18% MgO)...
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Ultramafic rock is very low in silica, with more than 90% of
mafic minerals (
komatiite, dunite). This
classification is
summarized in the
following table: The...
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similar to entrail-type
pahoehoe lavas on land.
Ultramafic lavas, such as
komatiite and
highly magnesian magmas that form boninite, take the
composition and...
