Eva Verda, Servette-Chuc mining complex, Saint-Marcel, Aosta Valley, Italyi
| Regional Level Types | |
|---|---|
| Eva Verda | Stream |
| Servette-Chuc mining complex | Mining Area |
| Saint-Marcel | Commune |
| Aosta Valley | Autonomous Region |
| Italy | - not defined - |
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Latitude & Longitude (WGS84):
45° 42' 5'' North , 7° 26' 56'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
251177
Long-form identifier:
mindat:1:2:251177:4
GUID (UUID V4):
1197e60f-3716-4259-8f07-f299688f931f
Other/historical names associated with this locality:
Eve Verda; Eau Verte; Fontaine Verte; Torrente de l'Eau Verte
Name(s) in local language(s):
Eva Verda (Eve Verda; Eau Verte; Fontaine Verte), Complesso minerario di Servette-Chuc, Saint-Marcel, Valle d'Aosta, Italia
A streamlet that descends from Servette mine and covers the rocks and the pebbles of the streambed with a colloidal blue-green precipitate. The unusual phenomenon can be easily observed at 1322 m in altitude, where the pathway from Plout to the Chuc mining village crosses the streamlet.
The blue-green precipitate is made of a mixture of nanocrystalline hydrowoodwardite [previously classified as woodwardite] and amorphous Al and Si oxyhydroxides (Tumiati et al., 2008).
It likely precipitates during a change of pH after the mixing of two different streams; one coming from Galleria Ribasso of the Servette mine (1789 m) and the other from the Chuc village (their confluence can be seen a few meters uphill).
This spectacular “fontaine colorée” was firstly described by Saint-Martin de La Motte (1784-85) and later observed by Horace-Bénedict de Saussure, in occasion of his trip to Saint-Marcel valley on 20th August 1792, as reported in his famous “Voyages dans les Alpes” (1796, tome 4).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 'Chlorite Group' |
| ⓘ Hydrowoodwardite ? Formula: (Cu1-xAlx)(OH)2[SO4]x/2 · nH2O Description: See http://www.mindat.org/forum.php?read,7,349801,350022#msg-350022 |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Hydrowoodwardite ? | 7.DD.35 | (Cu1-xAlx)(OH)2[SO4]x/2 · nH2O |
| Group 9 - Silicates | |||
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Chlorite Group' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Hydrowoodwardite | (Cu1-xAlx)(OH)2[SO4]x/2 · nH2O |
| O | Oxygen | |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Hydrowoodwardite | (Cu1-xAlx)(OH)2[SO4]x/2 · nH2O |
| Al | Aluminium | |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Hydrowoodwardite | (Cu1-xAlx)(OH)2[SO4]x/2 · nH2O |
| Si | Silicon | |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Hydrowoodwardite | (Cu1-xAlx)(OH)2[SO4]x/2 · nH2O |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Cu | Copper | |
| Cu | ⓘ Hydrowoodwardite | (Cu1-xAlx)(OH)2[SO4]x/2 · nH2O |
Other Regions, Features and Areas containing this locality
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References
