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Dora Maira Massif, Cuneo Province, Piedmont, Italy
Massiccio Dora Maira, Cuneo, Piemonte, Italia
Very high pressure metamorphism of Mg-rich pelites, at depths over 100 km, have created this very unusual pyrope-coesite-quartzite, now exposed in the Western Alps. Famous for its (nearly) colorless, very pure pyrope (over 95% pyrope molecule) as crude crystals up to coconut size. High-pressure phases like ellenbergerite and coesite are preserved only as inclusions in the pyrope, not in the surrounding matrix.
The main composition of the quartzite is: quartz, phengite, talc, kyanite, pyrope.
Mineral List
Mineral list contains entries from the region specified including sub-localities75 entries listed. 44 valid minerals. 6 type localities (valid minerals).
Localities in this Region
Italy
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References
- Hermann, J. (2003) Experimental evidence for diamond-facies metamorphism in the Dora-Maira massif. Lithos 70: 163-182.
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New Locality Added: Mount Poro, Vibo Valentia Province, Calabria, ItalyFrom Ferdinando Giovine, 26th May 2013 08:11:11