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I Mondei (Ca' Mondei), Montescheno, Antrona Valley, Ossola Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy

Photo: PGB 2009
Latitude: 46°4'56"N
Longitude: 8°13'35"E
I Mondei (Ca' Mondei), Montescheno, Valle Antrona, Val d'Ossola, Verbano-Cusio-Ossola, Piemonte, Italia

On the SW side of Moncucco, in Antrona Valley (Ossola), there is the Montescheno pegmatite. In the I Mondei locality, there was a quarry, now abandoned, which extracted quartz and feldspar from a pegmatite that in this area cut an amphibolitic peridotite within a gneiss formation.

"Despite not explicitly quoted in the published literature, the "I Mondei pegmatite" should be better classified as a "meta-pegmatite", based on field observations of the present day rock textures. The two families of radiometric ages found in the literature will be also better explained considering cooling ages and post-metamorphic peak ages as well." (PGB 2009)

Approximate location (after satellite image) is not far from:
46° 4'55.27"N; 8°13'35.04"E

Mineral List

Actinolite
Albite
Anorthoclase
Anthophyllite
'Apatite'
Autunite
Beryl
Biotite
Chrysoberyl
Clinochlore
Columbite
Cummingtonite
Dravite
Forsterite
Jimthompsonite
Kasolite
Monazite-(Ce)
Muscovite
Opal
Orthoclase
Parsonsite ?
Phosphuranylite
Picromerite
Pyrope
Quartz
Retgersite ?
Rutile
Scheelite
Schoepite ?
Siderite
Stilpnomelane
Talc
Uraninite
Uranophane
Uranopilite ?
Uranospathite
Xenotime-(Y)
Zircon


38 entries listed. 35 valid minerals.

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References

- Grill E., Pagliani G. (1939) Itinerari mineralogici and Roggiani A. G. (1940) - La pegmatite dell'Alpe I Mondei, Domodossola Natura, Vol. XXX, fasc. 3, Milano

- Cantadore F., Gramaccioli C.M. (1969) - Osservazioni sulla diffusione di alcuni minerali di terre rare nelle pegmatiti piemontesi e lombarde - Natura, vol. LX, fasc. 2, pp. 96-102, Milano

- Ravagnani, Daniele (1974), I giacimenti uraniferi italiani - Gruppo Min. Lombardo - Museo Civico di Storia Naturale di Milano.

- Biffi, P., Sbacchi, M., Sinelli E. (1999): La pegmatite de I Mondei. Rivista Mineralogica Italiana, 1/1999, 42-49.

- Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.

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Copyright © Jolyon Ralph and Ida Chau 1993-2013. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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