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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...
- Big Hole. Previously, the term
kimberlite has been
applied to
olivine lamproites as
Kimberlite II,
however this has been in error.
Kimberlite occurs in...
- 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...
-
kimberlite and
lamproite occurrences occur as
volcanic and
subvolcanic diatremes and maars;
lavas are
virtually unknown.
Vents of
Proterozoic lamproite (Argyle...
-
largely composed of one of two
characteristic rock
types —
kimberlite or
lamproite.
These rocks reflect the
composition of the volcanoes' deep
magma sources...
-
prominent lamproite diamond source is the
Argyle diamond mine in Australia. It is
notable that the
physical characteristics of
Australian lamproite and the...
-
volcanic eruptions and
deposited in
igneous rocks known as
kimberlites and
lamproites.
Synthetic diamonds can be
grown from high-purity
carbon under high pressures...
-
phase within ultrapot****ic
igneous rocks such as lamprophyre, kimberlite,
lamproite, and
other deeply sourced ultramafic or high-magnesian melts. In this...
- The
Ellendale Diamond Field is a
cluster of
diamond producing lamproite intrusions located 125 km ESE of
Derby within the WNW
trending Lennard Shelf to...
- been
reduced by
glacial and
subaerial erosion. The
volcano has
produced lamproite magmas, and is the
youngest volcano to have
produced such
magmas on Earth...
