Log In
Praborna Mine, Servette-Chuc mining complex, Saint-Marcel, Aosta Valley, Italyi
| Regional Level Types | |
|---|---|
| Praborna Mine | Mine (Inactive) |
| Servette-Chuc mining complex | Mining Area |
| Saint-Marcel | Commune |
| Aosta Valley | Autonomous Region |
| Italy | Country |
This page is currently not sponsored. Click here to sponsor this page.
Get Involved with mindat.org
Mindat.org has grown through countless contributions from mineral enthusiasts, collectors, researchers and experts around the world — people just like you.
Want to take part?
1
2
3
4
Contribute
Add photos, locality information and knowledge
Every contribution helps make mindat.org better for everyone.
Latitude & Longitude (WGS84):
45° 40' 45'' North , 7° 26' 57'' East
Latitude & Longitude (decimal):
Type:
Mine (Inactive) - last checked 2023
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Saint Marcel | 930 (2014) | 5.8km |
| Neyran-Etabloz | 670 (2014) | 6.4km |
| Nus | 1,826 (2014) | 6.9km |
| FΓ©nis | 1,667 (2015) | 7.1km |
| Villefranche | 593 (2014) | 7.3km |
Other/historical names associated with this locality:
Prabornaz Mine; Pralorgnan
Name(s) in local language(s):
Miniera di Prabornaz, Saint-Marcel, Valle d'Aosta, Italia
The manganese concentrations of Praborna(z) are restricted to a 4 Γ 8 m thick quartzite unit of diverse lithologies, which represents the basal part of the sedimentary cover of an ophiolite suite. Together they constituted the Piedmont Nappe which was metamorphosed up to the eclogite facies in Cretaceous times and was retrogressed in the early Tertiary.
The quartzite unit is composed of a succession of siliceous levels characterized by Mn-bearing minerals, reflecting differences in chemical composition and oxygen fugacity inherited from the original sediments. The parageneses evolved during the polyphasic Alpine metamorphism passing through a pre-eclogite blueschist facies event, the main eclogite facies event, and the several post-eclogite stages terminating in the greenschist facies.
These Mn concentrations were subsequently penetrated by various networks of cross-cutting veins and late fractures which were responsible for the mobilization of certain elements, in particular, K, Sr, and Ba.
Note on the mineral list: The reported slavΓkite is most probably not from the Praborna mine but from the old Servette-Chuc mining complex in the same municipality.
The quartzite unit is composed of a succession of siliceous levels characterized by Mn-bearing minerals, reflecting differences in chemical composition and oxygen fugacity inherited from the original sediments. The parageneses evolved during the polyphasic Alpine metamorphism passing through a pre-eclogite blueschist facies event, the main eclogite facies event, and the several post-eclogite stages terminating in the greenschist facies.
These Mn concentrations were subsequently penetrated by various networks of cross-cutting veins and late fractures which were responsible for the mobilization of certain elements, in particular, K, Sr, and Ba.
Note on the mineral list: The reported slavΓkite is most probably not from the Praborna mine but from the old Servette-Chuc mining complex in the same municipality.
Praborna Mine, Servette-Chuc mining complex, Saint-Marcel, Aosta Valley, Italy