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Pyroxenite is an
ultramafic igneous rock
consisting essentially of
minerals of the
pyroxene group, such as augite, diopside, hypersthene,
bronzite or enstatite...
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crystals are very brittle. It was
first described in 1965 in the
Afrikanda pyroxenite m****if, a
formation on Russia's Kola
Peninsula and was
named for Nikolai...
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layered intrusions, ****ociated with ****ulate
layers of wehrlite,
olivine pyroxenite, harzburgite, and even
chromitite (a ****ulate rock
consisting largely...
- are also
found in
pentlandite extracted from Sudbury, Ontario, and in
pyroxenite deposits in
South Africa. Ruthenium, a
polyvalent hard
white metal, is...
- phlogopite. The UG2
chromitites are
underlain by
pyroxenite footwall that is
distinct from
hanging wall
pyroxenite.
Chromite subhedral to
subrounded (less than...
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matrix Pumice –
Extremely vesicular volcanic rock,
typically light-colored
Pyroxenite –
Igneous rock - a co****
grained plutonic rock
composed of >90% pyroxene...
- A
sample of
pyroxenite (meteorite ALH84001 from Mars), a rock
consisting mostly of
pyroxene minerals...
- rock in
which the
fraction of
pyroxenes exceeds 60% are
classified as
pyroxenites rather than peridotites.
Pyroxenes are
typically dark in color. Hornblende...
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contains harzburgite and dunite, as well as
layers of
spinel pyroxenite,
garnet pyroxenite, and hornblendite. The
layers represent partial melts extracted...
-
Websterite is
ultramafic igneous rock, a type of
pyroxenite that has less than 5%
olivine and
roughly equal proportions of
orthopyroxene and clinopyroxene...
