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Lamproite is an ultrapot****ic mantle-derived
volcanic or
subvolcanic rock. It has low CaO, Al2O3, Na2O, high K2O/Al2O3, a
relatively high MgO content...
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largely composed of one of two
characteristic rock
types —
kimberlite or
lamproite.
These rocks reflect the
composition of the volcanoes' deep
magma sources...
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prominent lamproite diamond source is the
Argyle diamond mine in Australia. It is
notable that the
physical characteristics of
Australian lamproite and the...
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kimberlite and
lamproite occurrences occur as
volcanic and
subvolcanic diatremes and maars;
lavas are
virtually unknown.
Vents of
Proterozoic lamproite (Argyle...
- a
volcanic pipe of
lamproite,
rather than the more
usual kimberlite pipe; much
earlier attempts to mine
diamonds from a
lamproite pipe in Arkansas, United...
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volcanic eruptions and
deposited in
igneous rocks known as
kimberlites and
lamproites.
Synthetic diamonds can be
grown from high-purity
carbon under high pressures...
- Big Hole. Previously, the term
kimberlite has been
applied to
olivine lamproites as
Kimberlite II,
however this has been in error.
Kimberlite occurs in...
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which sometimes contains diamonds Komatiite – Magnesium-rich
igneous rock
Lamproite –
Mantle rock
expulsed to the
surface in
volcanic pipes Lamprophyre –...
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subcontinental mantle by
examining mantle xenoliths brought up in kimberlite,
lamproite, and
other volcanic pipes. The
histories of
these xenoliths have been...
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inclusions in diamonds, xenoliths, and such
other ultramafic rock such as
lamproite.
Analysis of
silicon carbide grains found in the
Murchison meteorite has...
