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Case Bardot, Fomarco, Marmazza Valley (Toppa Valley), Pieve Vergonte, Verbano-Cusio-Ossola Province, Piedmont, Italyi
| Regional Level Types | |
|---|---|
| Case Bardot | Outcrop |
| Fomarco | Village |
| Marmazza Valley (Toppa Valley) | Valley |
| Pieve Vergonte | Commune |
| Verbano-Cusio-Ossola Province | Province |
| Piedmont | Region |
| Italy | Country |
Case Bardot, Fomarco, Marmazza Valley (Toppa Valley), Ossola Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy
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Latitude & Longitude (WGS84):
46° 0' 40'' North , 8° 15' 32'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Pieve Vergonte | 1,888 (2014) | 0.2km |
| Piedimulera | 1,229 (2014) | 1.4km |
| Cimamulera | 108 (2014) | 1.5km |
| Vogogna | 1,434 (2014) | 2.5km |
| Rumianca | 319 (2014) | 3.0km |
Other Languages:
Italian:
Case Bardot, Fomarco, Valle Marmazza (Val Toppa), Pieve Vergonte, Provincia del Verbano-Cusio-Ossola, Piemonte, Italia
Quartz veins bearing argentiferous galena and scheelite, crosscuting the main schistosity of the Fobello-Rimella schists, in the vicinity of Case Bardot.
In the 1880s a short adit was excavated in a quartz vein just below Case Bardot, on the left side of the dry rivulet named Rivo Toietti. Another adit (coordinates: 46.011203013 N, 8.259645402 E), presently used as a water reservoir, was excavated at a lower elevation near Case Toietti.
Stolzite as well as the secondary minerals have been found a few meters above the entrance of the upper adit in a quartz vein outcrop, in association with galena veinlets and partly altered scheelite nodules (Conforti et al. 1992; Gentile & Vignola, 1992; Albertini et al., 2005). Stolzite, the most interesting mineral of this locality, appears as bipyramidal, tabular or pseudocubic crystals, up to 2-3 mm in size, orange to orange-yellow to yellow-greenish in colour, usually associated with galena and scheelite; iso-oriented aggregates of tabular stolzite crystals in scheelite have been rarely observed.
In the period 2008-2009, during the construction of the connecting road named "Case Sparse" - Lot 1, a road cut near Case Bardot evidenced some analogous quartz veins, which yielded abundant stolzite microcrystals.
Also scheelite samples from this locality, studied by Uspensky et al. (1998), showed a trace element content and the typical REE3+ distribution observed in the scheelites of other localities of the Marmazza Valley (Toppa Valley) ore field.
Note: this locality was errouneosly indicated by Conforti et al. (1992) as "Filone della Piana" [Piana vein]. This erroneous toponym is also used by Uspensky et al. (1998) to indicate the origin of two of the three analyzed scheelite samples from Fomarco. The error is due to the existence of two quite similar toponyms in the area: Piano and Piana (Alla Piana). The stolzite-scheelite locality is located inside the boundaries of the area Case Toietti - Piano - Case Bardot - Case Prossi, in which a prospecting permit for argentiferous galena was granted to Giuseppe Cicoletti and Vincenzo Bassi in 1881; on the contrary, at Piana (Alla Piana) locality, situated a little further north, a prospecting permit for auriferous pyrite was granted to Anna Maria Trabucchi in 1880.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Acanthite Formula: Ag2S |
| ⓘ Anglesite Formula: PbSO4 |
| ⓘ 'Beudantite-Segnitite Series' |
| ⓘ Cerussite Formula: PbCO3 References: |
| ⓘ Descloizite Formula: PbZn(VO4)(OH) |
| ⓘ Galena Formula: PbS References: |
| ⓘ Goethite Formula: Fe3+O(OH) |
| ⓘ Hemimorphite Formula: Zn4Si2O7(OH)2 · H2O |
| ⓘ Jarosite Formula: KFe3+3(SO4)2(OH)6 |
| ⓘ Pyromorphite Formula: Pb5(PO4)3Cl References: |
| ⓘ Quartz Formula: SiO2 References: |
| ⓘ Scheelite Formula: Ca(WO4) References: |
| ⓘ Stolzite Formula: Pb(WO4) References: |
| ⓘ Vanadinite Formula: Pb5(VO4)3Cl |
| ⓘ Wulfenite Formula: Pb(MoO4) |
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Acanthite | 2.BA.35 | Ag2S |
| ⓘ | Galena | 2.CD.10 | PbS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Goethite | 4.00. | Fe3+O(OH) |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Cerussite | 5.AB.15 | PbCO3 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Anglesite | 7.AD.35 | PbSO4 |
| ⓘ | Jarosite | 7.BC.10 | KFe3+3(SO4)2(OH)6 |
| ⓘ | Scheelite | 7.GA.05 | Ca(WO4) |
| ⓘ | Stolzite | 7.GA.05 | Pb(WO4) |
| ⓘ | Wulfenite | 7.GA.05 | Pb(MoO4) |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Descloizite | 8.BH.40 | PbZn(VO4)(OH) |
| ⓘ | Pyromorphite | 8.BN.05 | Pb5(PO4)3Cl |
| ⓘ | Vanadinite | 8.BN.05 | Pb5(VO4)3Cl |
| Group 9 - Silicates | |||
| ⓘ | Hemimorphite | 9.BD.10 | Zn4Si2O7(OH)2 · H2O |
| Unclassified | |||
| ⓘ | 'Beudantite-Segnitite Series' | - | |
List of minerals for each chemical element
Other Regions, Features and Areas containing this locality
Eurasian PlateTectonic Plate
- AlpsAccretionary Complex
EuropeContinent
- The AlpsMountain Range
Italy
- Piedmont
- Verbano-Cusio-Ossola Province
- Ossola ValleyValley
- Verbano-Cusio-Ossola Province
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Case Bardot, Fomarco, Marmazza Valley, Pieve Vergonte, Verbano-Cusio-Ossola Province, Piedmont, Italy