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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...
- anthophyllite.
Cordierite also
occurs in some granites, pegmatites, and
norites in
gabbroic magmas.
Alteration products include mica, chlorite, and talc...
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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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bronzite is a
constituent of many
mafic to
ultramafic igneous rocks, such as,
norite, gabbro, and
especially peridotite, and of the
serpentinites which have...
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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...
- are also
intermediate varieties corresponding mineralogically to
norites, quartz-
norites and diorites. A
special feature,
recurring in many
members of the...
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along a SSW/NNE
oriented graben. It
consists of peridotites, pyroxenites,
norites and
bands of chromitite. The
oldest supracrustal rocks are the Sebakwian...
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pyroxenites with ****ociated
chromitite layers toward the base with more
mafic norites,
gabbros and
anorthosites in the
upper layers. Some
include diorite, and...
-
orthopyroxene gabbro,
while a rock
similar to
norite but
containing more
clinopyroxene is
called a
clinopyroxene norite.
Gabbros are also
sometimes classified...
