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Eva Verda (Eve Verda; Eau Verte; Fontaine Verte), Servette-Chuc mining complex, Saint-Marcel, Aosta Valley, Italy

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Location is approximate, estimate based on other nearby localities.
 
Latitude & Longitude (WGS84): 45° North , 7° East (est.)
Margin of Error:~1km
Köppen climate type:ET : Tundra
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 with a colloidal blue-green precipitate the rocks and the pebbles of the streambed. 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).

Regions containing this locality

The Alps, Europe

Mountain Range - 2,207 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


3 valid minerals.

Detailed Mineral List:

'Chlorite Group'
Reference: Tumiati, S., Godard, G., Masciocchi, N., Martin, S., Monticelli, D. (2008): Environmental factors controlling the precipitation of Cu-bearing hydrotalcite-like compounds from mine waters. The case of the "Eve verda" spring (Aosta Valley, Italy). European Journal of Mineralogy, 20, 73-94.
Hydrowoodwardite ?
Formula: (Cu1-xAlx)(OH)2[SO4]x/2 · nH2O
Description: See http://www.mindat.org/forum.php?read,7,349801,350022#msg-350022
Reference: Tumiati, S., Godard, G., Masciocchi, N., Martin, S., Monticelli, D. (2008): Environmental factors controlling the precipitation of Cu-bearing hydrotalcite-like compounds from mine waters. The case of the "Eve verda" spring (Aosta Valley, Italy). European Journal of Mineralogy, 20, 73-94.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Tumiati, S., Godard, G., Masciocchi, N., Martin, S., Monticelli, D. (2008): Environmental factors controlling the precipitation of Cu-bearing hydrotalcite-like compounds from mine waters. The case of the "Eve verda" spring (Aosta Valley, Italy). European Journal of Mineralogy, 20, 73-94.
Quartz
Formula: SiO2
Reference: Tumiati, S., Godard, G., Masciocchi, N., Martin, S., Monticelli, D. (2008): Environmental factors controlling the precipitation of Cu-bearing hydrotalcite-like compounds from mine waters. The case of the "Eve verda" spring (Aosta Valley, Italy). European Journal of Mineralogy, 20, 73-94.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
'Quartz'4.DA.05SiO2
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.15KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-

List of minerals arranged by Dana 8th Edition classification

Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
Hydrowoodwardite ?-(Cu1-xAlx)(OH)2[SO4]x/2 · nH2O

List of minerals for each chemical element

HHydrogen
H Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2O
H MuscoviteKAl2(AlSi3O10)(OH)2
OOxygen
O Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2O
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
AlAluminium
Al Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2O
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
SSulfur
S Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2O
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
CuCopper
Cu Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2O

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Saint-Martin de La Motte, F. (1784-85): Sur la fontaine verte de Saint-Marcel dans la vallée d'Aoste. Mem. R. Acc. Sci. Torino [1], 7, 1-12.
De Saussure, H.B. (1796): Voyages dans les Alpes, précédés d'un essai sur l'histoire naturelle des environs de Genève. Tome 4. Fauche-Borel Ed., Neuchâtel, page 459.
Zinetti, G. (2002): Analisi ambientale del dissesto idrogeologico causato dallo stato di abbandono e di degrado della miniera di Cu e Fe di Servette nel versante destro della bassa valle di Saint-Marcel (AO) e proposta di recupero ambientale. Tesi di Laurea, Università degli Studi dell’Insubria (Como).
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Amici del Museo "F. Eusebio" di Alba, Ed., 607 pp.
Tumiati, S., Godard, G., Masciocchi, N., Martin, S., Monticelli, D. (2008): Environmental factors controlling the precipitation of Cu-bearing hydrotalcite-like compounds from mine waters. The case of the "Eve verda" spring (Aosta Valley, Italy). European Journal of Mineralogy, 20, 73-94.


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