- 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...
- diorites,
lamprophyres, alkali-syenites and rhyolites. The
parent gabbroic magma is
shown to have
given rise in
sequence to diorites,
lamprophyres and alkali-syenites...
- Vaselli, O. (October 1999). "Petrology and
geochemistry of
xenoliths in
lamprophyres from the
Deccan Traps:
implications for the
nature of the deep crust...
- R. H., Rock, N. M. S.,
Scott Smith, B. H., 1996.
classification of
lamprophyres, lamproites, kimberlites, and the kalsilitic, melilitic, and leucitic...
-
otherwise inaccessible mantle. Basalts, kimberlites,
lamproites and
lamprophyres,
which have
their source in the
upper mantle,
often contain fragments...
-
continental crust above upwelling mafic magma, such as at rift zones.
Lamprophyres and
melilitic rocks Kimberlite Lamproite Orangeite (see
Group II kimberlite)...
-
greater than 90% amphiboles,
which have a
feldspar groundm****, may be
lamprophyres.
Metamorphic rocks composed primarily of amphibole, plagioclase, with...
- Lamproite – Ultrapot****ic mantle-derived
volcanic or
subvolcanic rock
Lamprophyre – Ultrapot****ic
igneous rocks – An ultramafic, ultrapot****ic intrusive...
- more than 50%
carbonate minerals are
classified as carbonatites,
while lamprophyres are rare ultrapot****ic rocks. Both are
further classified based on detailed...
- is
encountered as a
primary igneous phenocryst within lamproites and
lamprophyres, the
result of
highly fluid-rich melt
compositions within the deep mantle...
