-
Ultramafic rocks (also
referred to as
ultrabasic rocks,
although the
terms are not
wholly equivalent) are
igneous and meta-igneous
rocks with a very low...
-
metamorphic mineral derived from
ultramafic rocks along with serpentinite.
Anthophyllite is
formed by the
breakdown of talc in
ultramafic rocks in the
presence of...
-
chemical types based on
silica content: felsic, intermediate, mafic, and
ultramafic.
Felsic or
silicic lavas have a
silica content greater than 63%. They...
- on the Mohs
scale of 5.5.
Chromite minerals are
mainly found in mafic-
ultramafic igneous intrusions and are also
sometimes found in
metamorphic rocks....
- melt. Ideally, the
stratigraphic sequence of an
ultramafic-mafic
intrusive complex consists of
ultramafic peridotites and
pyroxenites with ****ociated chromitite...
- analcite, prehnite, natrolite, scolecite, chabazite, heulandite, etc.
Ultramafic tuffs are
extremely rare;
their characteristic is the
abundance of olivine...
- and
small intrusions. They are
alkaline silica-undersaturated
mafic or
ultramafic rocks with high
magnesium oxide, >3% pot****ium oxide, high
sodium oxide...
- of
ferromagnesian minerals, such as
olivine and pyroxene, in
mafic and
ultramafic rock to
produce serpentinite.
Minerals formed by
serpentinization include...
-
intruded these metamorphic rocks, and also
intrusive Early Paleoproterozoic ultramafic rocks. The term
Zoroaster Plutonic Complex is used for all Paleoproterozoic...
- zones; stratigraphy;
magmatism and
igneous rocks;
ophiolite series and
ultramafic rocks; and
orogenic events in Iran.
Considering geological and structural...
