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Sericitic alteration or
sericitization is a
process of
mineral alteration caused by
hydrothermal fluids invading permeable country rock.
Plagioclase feldspar...
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often altered or
formed by
hydrothermal processes — chloritization,
sericitization and silicification.
These deposits are
often iron
hydroxides containing...
- host rocks.
These alterations include; silicification, pyritization,
sericitization, chloritization,
carbonate alteration, tourmalinization, and greisens...
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sandstone and tuff
interlayered with
green or maroon,
chloritized and
sericitized basaltic to
andesitic lavas, some with
amygdules of
quartz and chlorite...
- to
strongly sheared. The
feldspars have been
moderately to
thoroughly sericitized and
mildly saussuritized. Much of the rock has been
sheared to a fine-grained...
- : 271
There are also
minor tungsten deposits, such as at Kuhian.: 271
Sericitization is less
widespread in
Tarom than in Hashtjin, and "greisen-type metasomatism"...
- birefringence. It is
characteristically found in
earthy crusts in a
highly sericitized rock and is
present in
highly oxidized conditions near the surface. When...
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exist in
pyrite ****ociated with
deformed magnetite-rich iron formations,
sericitized and
carbonatized felsic volcanic rock, quartz-pyrrhotite-chalcopyrit...
