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Prehnite is an
inosilicate of
calcium and
aluminium with the formula: Ca2Al(AlSi3O10)(OH)2 with
limited Fe3+
substitutes for
aluminium in the structure...
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quartz The
prehnite-pumpellyite
facies is a
little higher in
pressure and
temperature than the
zeolite facies. It is
named for the
minerals prehnite (a Ca-Al-phyllosilicate)...
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Piemontite Pietersite Plumbogummite Pollucite Polyhalite Poudretteite Powellite Prehnite Prismatine Prosopite Proustite Psilomelane Pumpellyite Chlorastrolite (var...
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initially undergoes low-grade
metamorphism to
metabasalt of the
zeolite and
prehnite-pumpellyite facies, but as the
basalt subducts to
greater depths, it is...
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through the zeolite,
prehnite-pumpellyite, blueschist, and
eclogite facies stability zones of
subducted oceanic crust.
Zeolite and
prehnite-pumpellyite facies...
- The
prehnite-pumpellyite
facies is a
metamorphic facies typical of
subseafloor alteration of the
oceanic crust around mid-ocean
ridge spreading centres...
- of
beryllium Zircon, a
mineral belonging to the
group of
nesosilicates Prehnite, an
inosilicate of
calcium and
aluminium Tourmaline, a
crystalline boron...
- 7)•(OH) 2H 2O.
Chlorastrolite was once
thought to be an
impure variety of
prehnite or thomsonite.
Chlorastrolite occurs as
amygdaloid structures and fracture...
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indicator mineral of the
prehnite-pumpellyite
metamorphic facies. It is ****ociated with chlorite, epidote, quartz,
calcite and
prehnite. It was
first described...
-
diagenetic processes which turn
sediments into
sedimentary rocks, and
prehnite-pumpellyite facies,
which is a
hallmark of
subseafloor alteration of the...
