- America, and
young ultramafic lamprophyres from
Gympie in
Australia with 18.5% MgO at ~250 Ma.
Modern science treats lamprophyres as a catch-all term for ultrapot****ic...
-
greater than 90% amphiboles,
which have a
feldspar groundm****, may be
lamprophyres.
Metamorphic rocks composed primarily of amphibole, plagioclase, with...
-
otherwise inaccessible mantle. Basalts, kimberlites,
lamproites and
lamprophyres,
which have
their source in the
upper mantle,
often contain fragments...
- diorites,
lamprophyres, alkali-syenites and rhyolites. The
parent gabbroic magma is
shown to have
given rise in
sequence to diorites,
lamprophyres and alkali-syenites...
-
volcanic rocks ****ociated with this rise are
tholeiitic lavas and
intrusive lamprophyre sheets,
which form a
volcanic ba****t, on average, 50 m (160 ft) below...
- the
Southern Kerguelen Plateau, the
Rajmahal Traps/Indian
lamprophyres,
Antarctic lamprophyres, and the
Central Kerguelen Plateau/Broken Ridge. In the late...
- is
encountered as a
primary igneous phenocryst within lamproites and
lamprophyres, the
result of
highly fluid-rich melt
compositions within the deep mantle...
- rock Lamproite –
Mantle rock
expulsed to the
surface in
volcanic pipes Lamprophyre – Type of ultrapot****ic
igneous rock – An ultramafic, ultrapot****ic intrusive...
-
classified as
diabases or dolerites. Rare
ultramafic hypabyssal rocks called lamprophyres have
their own
classification scheme.
Intrusive rocks are characterized...
-
microdiamonds in the
island arc of ****an are
found in a type of rock
called lamprophyre.
Kimberlites can be
found in
narrow (1 to 4 meters) ****s and sills,...
