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Norite is a
mafic intrusive igneous rock
composed largely of the calcium-rich
plagioclase labradorite, orthopyroxene, and olivine. The name
norite is derived...
- with a
metallic luster. The
mineral occurs with
mafic igneous rocks like
norites, and may form from
pyrite during metamorphic processes.
Pyrrhotite is ****ociated...
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other PGMs are rare. The most
extensive deposits have been
found in the
norite belt of the
Bushveld Igneous Complex covering the
Transvaal Basin in South...
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orthopyroxene gabbro,
while a rock
similar to
norite but
containing more
clinopyroxene is
called a
clinopyroxene norite.
Gabbros are also
sometimes classified...
- anthophyllite.
Cordierite also
occurs in some granites, pegmatites, and
norites in
gabbroic magmas.
Alteration products include mica, chlorite, and talc...
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igneous rocks norite and hypersthene-andesite, of
which it
forms an
essential constituent. The co****-grained labradorite-hypersthene-rock (
norite) of Paul's...
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clinopyroxene – A silica-undersaturated
plutonic rock with >90%
nepheline Norite –
Mafic intrusive igneous rock – A hypersthene-bearing
gabbro Obsidian –...
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structure is
divided into
three sections: The
Lower Reef is
composed of
norites and
feldspathic pyroxenites that have been
recrystallized and overprinted...
- are also
intermediate varieties corresponding mineralogically to
norites, quartz-
norites and diorites. A
special feature,
recurring in many
members of the...
-
geological terms,
black granite might be gabbro, diabase, basalt, diorite,
norite, or anorthosite.
Morales Demarco, Manuela; Oyhantçabal, Pedro; Stein, Karl-Jochen;...
