-
extrusive rocks essentially free of feldspars. They
range from olivine-rich
melilitites through leucites to nephelinites, containing, in
various proportions...
- example) kalsilite-leucite-olivine
melilitite,
depending on the most
abundant accessory minerals. Alnöite is a
melilitite devoid of gl**** or feldspathoids...
- the
upper mantle (2% to 4%) can
produce highly alkaline magmas such as
melilitites,
while a
greater degree of
partial melting (8% to 11%) can
produce alkali...
-
accessory mineral in
alkaline and
mafic igneous rocks,
nepheline syenite,
melilitite,
kimberlites and rare carbonatites.
Perovskite is a
common mineral in...
-
intruded carbonate rocks, and to a far
lesser extent in uncompahgrites,
melilitites, alnoites,
lamprophyres and
possibly kimberlite pipes.
Gehlenite has...
- (Foidite)—When possible, classify/name
according to the
dominant feldspathoid.
Melilitites also plot in this area and can be
distinguished by
additional chemical...
-
Olivine melilitite lapillistone from Höwenegg...
- "post-erosional" or "rejuvenated"
stage during which lavas of
alkali basalt,
melilitite and
nephelinite composition; such
volcanism has been
observed on Koolau...
- Cretaceous. In the late Cretaceous, kimberlite, carbonatite,
olivine melilitite and
tuffaceous diatreme intruded the Sao
Francisco Craton.
Magmatic activity...
