-
Lamprophyres (from
Ancient Gr**** λαμπρός (lamprós) 'bright', and φύρω (phúrō) 'to mix') are uncommon, small-volume ultrapot****ic
igneous rocks primarily...
- A
composite **** in Orkney, Scotland, with
bostonite margins and a
camptonite center...
-
found in
places and some of
these are
themselves cut by
Palaeocene age
camptonite and
monchiquite ****s
ascribed to the 'Iona-Ross of Mull **** swarm’....
-
normal faults most of
which run
broadly northwest–southeast.
Dolerite and
camptonite ****s of Permo-Carboniferous or
Tertiary age are also seen in the east...
-
which contains only hornblende, has the same
composition as some of the
camptonites of the same
locality that
contain feldspar and
hornblende of a different...
- SE.
Numerous NW to SE ****s cut
through the island: quartz-dolerite,
camptonite and
monchiquite ****s of Permo-Carboniferous age and
later Palaeogene...
-
underlain by 119 to 117 million year old
plutonic basanite,
lamprophyre and
camptonite while to the
immediate southeast amphibole gabbro and
peralkaline rocks...
- picrites, and
nepheline syenites. ****ociated ****
rocks are
lamprophyres (
camptonites and monchiquites).
Other features of
interest are
several different post-metamorphic...
- Brown, J.F., 1975. Pot****ium–Argon
evidence of a
Permian age for the
camptonite ****s: Orkney.
Scottish Journal of
Geology 11, 259–262
Hydrocarbon Potential...
