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Valbrutta (Val Brutta), Lanzada, Lanterna Valley, Malenco Valley, Valtellina, Sondrio Province, Lombardy, Italy

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Location is approximate, estimate based on other nearby localities.
 
Latitude & Longitude (WGS84): 46° North , 9° East (est.)
Margin of Error:~2km
Köppen climate type:ET : Tundra
Name(s) in local language(s):Valbrutta (Val Brutta), Lanzada, Val Lanterna, Valmalenco (Val Malenco), Valtellina, Sondrio, Lombardia, Italia


Minerals are found in serpentinite at various sites, such as the old asbestos mines, serpentinite quarries, and serpentinite block accumulations.

Andradite var. demantoid and chrysotile are the most known mineral from Valbrutta. In particular, small emerald-green crystals of demantoid with fibrous asbestos (chrysotile), and sometimes in association with calcite, have been found in the old asbestos mines, called “dei Puntesci”, located at an elevation of 1570 m, in the little valley descending from Ristoro di Franscia at Dossi di Franscia (1650 m) towards Valbrutta (Gramaccioli, 1962). Asbestos specimens, with fibres that can attain 30 cm in length, have been recorded from the old serpentinite quarries, named “dei Rive”, located below Ristoro di Franscia, always on the right slope of Valbrutta (Gramaccioli, 1962). Serpentinite blocks from the talus on the orographic left of Lanterna stream, in proximity of the road, have yielded interesting specimens of demantoid, in which emerald-green crystals are disseminated among other ones of yellowish colour (Bedognè, 1970 and 1979).
Hydrated magnesium carbonates are sporadically found inside serpentinite fissures. Six years earlier the official description of artinite from Dossi di Franscia (type locality), Luigi Brugnatelli already studied an identical hydrated magnesium carbonate (Brugnatelli, 1897 and 1899) which he personally collected in Valbrutta (Val Brutta). From the chemical analysis he deduced the formula MgCO3•Mg(OH)2•3H2O, but, due to the scarcity of the analysed material (0.171 g including impurities), Brugnatelli thought it was prudent to wait for a new analysis before recognising the mineral as a new species. The new analysis, that he performed on the abundant material found in 1902 at Dossi di Francia by Pietro Sigismund and forwarded through Ettore Artini, confirmed the identicalness of the two finds. Artinite has also been found in recent times at the serpentinite quarries.
Carbonate veins (hydrothermalites) in serpentinite are the source of various interesting minerals, such as: dolomite, chrysotile, magnetite, copper, cuprite, and malachite at the ancient municipal asbestos mine of Valbrutta (located below Ristoro di Franscia on the right slope of Valbrutta); dolomite, calcite, quartz, rutile, anatase, ilmenite, chlorite, talc, and sulphides at the serpentinite quarries on the orographic left of Lanterna stream; dolomite, calcite, sulphides, magnetite, rutile, anatase, and apatite in the serpentinite block accumulations of the Lanzada-Campo Franscia road works dumped at Valbrutta and Campo Franscia (Franscia).
Furthermore, titanian hydroxylclinohumite-forsterite-calcite veins are not rare in serpentinite of this area (Trommsdorff and Evans, 1980; Bedognè et al., 1993; Bedognè et al., 2006).

Notes:

“Ti-bearing clinohumite; titanclinohumite”: according to the analyses performed, this mineral in the Malenco valley serpentinite is practically fluorine-free (Trommsdorff and Evans, 1980). Therefore, after institution of the new species hydroxylclinohumite in 1999, all records of “titanclinohumite” in the antecedent literature and all specimens preserved in public and private collections consequently labelled are now Ti-bearing hydroxylclinohumite (Bedognè et al., 2006).

“Mauri quarry”: one of the three active serpentinite quarries at Valbrutta is operated by the company Marmi Mauri S.r.l.. As the same company operates three serpentinite quarries in the municipal territory of Lanzada (at Le Prese, Valbrutta, and Dossi di Franscia respectively), some confusion can arise about the exact provenance of specimens simply labelled as from “Mauri quarry, Lanzada”. Nevertheless, the name Mauri quarry has been generally used among the mineral collectors to indicate the one located at Le Prese (http://www.mindat.org/loc-233994.html), where vesuvianite-rich rodingite dykes have been evidenced.

Regions containing this locality

The Alps, Europe

Mountain Range - 2,201 mineral species & varietal names listed

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Standard Detailed Strunz Dana Chemical Elements

Mineral List


24 valid minerals.

Detailed Mineral List:

Anatase
Formula: TiO2
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Andradite
Formula: Ca3Fe3+2(SiO4)3
Reference: Gramaccioli, C.M. (1962) I minerali valtellinesi nella raccolta di Pietro Sigismund. Ed. privata, Milano, 179 pp. Bedognè, F. (1970) Località di ritrovamento dei demantoidi. In: Boscardin, M., De Michele, V., Scaini, G. Itinerari mineralogici della Lombardia. Ed. Museo Civ. St. Nat. e Soc. It. Sci. Nat., Milano, 86-88. Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Andradite var: Demantoid
Formula: Ca3Fe3+2(SiO4)3
Reference: Gramaccioli, C.M. (1962) I minerali valtellinesi nella raccolta di Pietro Sigismund. Ed. privata, Milano, 179 pp. Bedognè, F. (1970) Località di ritrovamento dei demantoidi. In: Boscardin, M., De Michele, V., Scaini, G. Itinerari mineralogici della Lombardia. Ed. Museo Civ. St. Nat. e Soc. It. Sci. Nat., Milano, 86-88. Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Antigorite
Formula: Mg3(Si2O5)(OH)4
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
'Apatite'
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Artinite
Formula: Mg2(CO3)(OH)2 · 3H2O
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993): I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Brucite
Formula: Mg(OH)2
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Calcite
Formula: CaCO3
Reference: Gramaccioli, C.M. (1962) I minerali valtellinesi nella raccolta di Pietro Sigismund. Ed. privata, Milano, 179 pp. Bedognè, F. (1970) Località di ritrovamento dei demantoidi. In: Boscardin, M., De Michele, V., Scaini, G. Itinerari mineralogici della Lombardia. Ed. Museo Civ. St. Nat. e Soc. It. Sci. Nat., Milano, 86-88. Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Chalcopyrite
Formula: CuFeS2
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
'Chlorite Group'
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Chrysotile
Formula: Mg3(Si2O5)(OH)4
Reference: Gramaccioli, C.M. (1962) I minerali valtellinesi nella raccolta di Pietro Sigismund. Ed. privata, Milano, 179 pp. Bedognè, F. (1970) Località di ritrovamento dei demantoidi. In: Boscardin, M., De Michele, V., Scaini, G. Itinerari mineralogici della Lombardia. Ed. Museo Civ. St. Nat. e Soc. It. Sci. Nat., Milano, 86-88. Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Copper
Formula: Cu
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Cuprite
Formula: Cu2O
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Diopside
Formula: CaMgSi2O6
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Dolomite
Formula: CaMg(CO3)2
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Forsterite
Formula: Mg2SiO4
Reference: Trommsdorff, V., and Evans, B.W. (1980) Titanian hydroxyl-clinohumite formation and breakdown in antigorite rocks (Malenco - Italy). Contrib. Mineral. Petrol., 72, 229-242. Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp. Bedognè, F., Montrasio, A., Sciesa, E. (2006) I minerali della media-alta Valtellina, delle Orobie valtellinesi e della Val Poschiavo. Aggiornamenti sulle altre località della provincia di Sondrio. Bettini, Sondrio, 255 pp.
Hydroxylclinohumite
Formula: Mg9(SiO4)4(OH)2
Reference: Trommsdorff, V., and Evans, B.W. (1980) Titanian hydroxyl-clinohumite formation and breakdown in antigorite rocks (Malenco - Italy). Contrib. Mineral. Petrol., 72, 229-242. Bedogné, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp. Bedognè, F., Montrasio, A., Sciesa, E. (2006) I minerali della media-alta Valtellina, delle Orobie valtellinesi e della Val Poschiavo. Aggiornamenti sulle altre località della provincia di Sondrio. Bettini, Sondrio, 255 pp.
Ilmenite
Formula: Fe2+TiO3
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Millerite
Formula: NiS
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Pyrite
Formula: FeS2
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Pyrrhotite
Formula: Fe7S8
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Quartz
Formula: SiO2
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Rutile
Formula: TiO2
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Sphalerite
Formula: ZnS
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Talc
Formula: Mg3Si4O10(OH)2
Reference: Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Copper'1.AA.05Cu
Group 2 - Sulphides and Sulfosalts
'Chalcopyrite'2.CB.10aCuFeS2
Millerite2.CC.20NiS
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
'Anatase'4.DD.05TiO2
'Brucite'4.FE.05Mg(OH)2
'Cuprite'4.AA.10Cu2O
Ilmenite4.CB.05Fe2+TiO3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
'Artinite'5.DA.10Mg2(CO3)(OH)2 · 3H2O
'Calcite'5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Malachite5.BA.10Cu2(CO3)(OH)2
Group 9 - Silicates
'Andradite'9.AD.25Ca3Fe3+2(SiO4)3
var: Demantoid9.AD.25Ca3Fe3+2(SiO4)3
'Antigorite'9.ED.15Mg3(Si2O5)(OH)4
'Chrysotile'9.ED.15Mg3(Si2O5)(OH)4
Diopside9.DA.15CaMgSi2O6
Forsterite9.AC.05Mg2SiO4
Hydroxylclinohumite9.AF.55Mg9(SiO4)4(OH)2
Talc9.EC.05Mg3Si4O10(OH)2
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Chlorite Group'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Copper1.1.1.3Cu
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Millerite2.8.16.1NiS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
A2X3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Anatase4.4.4.1TiO2
Rutile4.4.1.1TiO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
X(OH)2
Brucite6.2.1.1Mg(OH)2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 16b - HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
Artinite16b.3.1.1Mg2(CO3)(OH)2 · 3H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Forsterite51.3.1.2Mg2SiO4
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Andradite51.4.3b.1Ca3Fe3+2(SiO4)3
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Antigorite71.1.2a.1Mg3(Si2O5)(OH)4
Chrysotile71.1.5.1Mg3(Si2O5)(OH)4
Sheets of 6-membered rings with 2:1 layers
Talc71.2.1.3Mg3Si4O10(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
Andradite
var: Demantoid
-Ca3Fe3+2(SiO4)3
'Apatite'-
'Chlorite Group'-
Hydroxylclinohumite-Mg9(SiO4)4(OH)2

List of minerals for each chemical element

HHydrogen
H AntigoriteMg3(Si2O5)(OH)4
H ArtiniteMg2(CO3)(OH)2 · 3H2O
H BruciteMg(OH)2
H ChrysotileMg3(Si2O5)(OH)4
H HydroxylclinohumiteMg9(SiO4)4(OH)2
H MalachiteCu2(CO3)(OH)2
H TalcMg3Si4O10(OH)2
CCarbon
C ArtiniteMg2(CO3)(OH)2 · 3H2O
C CalciteCaCO3
C DolomiteCaMg(CO3)2
C MalachiteCu2(CO3)(OH)2
OOxygen
O AnataseTiO2
O AndraditeCa3Fe23+(SiO4)3
O AntigoriteMg3(Si2O5)(OH)4
O ArtiniteMg2(CO3)(OH)2 · 3H2O
O BruciteMg(OH)2
O CalciteCaCO3
O ChrysotileMg3(Si2O5)(OH)4
O CupriteCu2O
O Andradite (var: Demantoid)Ca3Fe23+(SiO4)3
O DiopsideCaMgSi2O6
O DolomiteCaMg(CO3)2
O ForsteriteMg2SiO4
O HydroxylclinohumiteMg9(SiO4)4(OH)2
O IlmeniteFe2+TiO3
O MagnetiteFe2+Fe23+O4
O MalachiteCu2(CO3)(OH)2
O QuartzSiO2
O RutileTiO2
O TalcMg3Si4O10(OH)2
MgMagnesium
Mg AntigoriteMg3(Si2O5)(OH)4
Mg ArtiniteMg2(CO3)(OH)2 · 3H2O
Mg BruciteMg(OH)2
Mg ChrysotileMg3(Si2O5)(OH)4
Mg DiopsideCaMgSi2O6
Mg DolomiteCaMg(CO3)2
Mg ForsteriteMg2SiO4
Mg HydroxylclinohumiteMg9(SiO4)4(OH)2
Mg TalcMg3Si4O10(OH)2
SiSilicon
Si AndraditeCa3Fe23+(SiO4)3
Si AntigoriteMg3(Si2O5)(OH)4
Si ChrysotileMg3(Si2O5)(OH)4
Si Andradite (var: Demantoid)Ca3Fe23+(SiO4)3
Si DiopsideCaMgSi2O6
Si ForsteriteMg2SiO4
Si HydroxylclinohumiteMg9(SiO4)4(OH)2
Si QuartzSiO2
Si TalcMg3Si4O10(OH)2
SSulfur
S ChalcopyriteCuFeS2
S MilleriteNiS
S PyriteFeS2
S PyrrhotiteFe7S8
S SphaleriteZnS
CaCalcium
Ca AndraditeCa3Fe23+(SiO4)3
Ca CalciteCaCO3
Ca Andradite (var: Demantoid)Ca3Fe23+(SiO4)3
Ca DiopsideCaMgSi2O6
Ca DolomiteCaMg(CO3)2
TiTitanium
Ti AnataseTiO2
Ti IlmeniteFe2+TiO3
Ti RutileTiO2
FeIron
Fe AndraditeCa3Fe23+(SiO4)3
Fe ChalcopyriteCuFeS2
Fe Andradite (var: Demantoid)Ca3Fe23+(SiO4)3
Fe IlmeniteFe2+TiO3
Fe MagnetiteFe2+Fe23+O4
Fe PyriteFeS2
Fe PyrrhotiteFe7S8
NiNickel
Ni MilleriteNiS
CuCopper
Cu ChalcopyriteCuFeS2
Cu CopperCu
Cu CupriteCu2O
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn SphaleriteZnS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Brugnatelli, L. (1897): Prime contribuzioni allo studio dei giacimenti di amianto della Valle Lanterna. Rend. R. Ist. Lomb. Sc. Let., Serie II, 30, 1-13.
Brugnatelli, L. (1899): Über ein wahrscheinlich neues Mineral aus den Asbestgruben im Val Brutta (Veltin). Zeitschr. für Krist., 31, 55-56.
Gramaccioli, C.M. (1962): I minerali valtellinesi nella raccolta di Pietro Sigismund. Ed. privata, Milano, 179 pp.
Bedognè, F. (1970): Località di ritrovamento dei demantoidi. In: Boscardin, M., De Michele, V., Scaini, G. Itinerari mineralogici della Lombardia. Ed. Museo Civ. St. Nat. e Soc. It. Sci. Nat., Milano, 77-80.
Amthauer, G., Kurtz, W., Rost, F., Schloemer, H. (1974): Chemismus und Genese des Andradits aus dem Serpentinit des Val Malenco (Bernina-Gebiet/Oberitalien). Schweiz. Miner. Petr. Mitt., 54, 691-706.
De Michele, V. (1974): Guida mineralogica d'Italia. Ed. De Agostini, Novara, 2 vol., 408 pp.
Gramaccioli, C.M. (1975): Minerali alpini e prealpini. Istituto Italiano Edizioni Atlas, Bergamo, 2 vol., 472 pp.
Bedognè, F. (1979): Itinerari mineralogici. Valmalenco e media Valtellina. Ed. Comunità Montana Valtellina-Ass. Turismo, Sondrio, 63 pp.
Bedognè, F. (1980): Die Mineralien der Grüngesteine des Val Malenco. Lapis, 1980/6, 9-13.
Trommsdorff, V., and Evans, B.W. (1980) Titanian hydroxyl-clinohumite formation and breakdown in antigorite rocks (Malenco - Italy). Contrib. Mineral. Petrol., 72, 229-242.
Bedognè, F., and Sciesa, E. (1993) Die Demantoide vom Val Malenco, Sondrio, Italien. Mineralien Welt, 1993/6, 25-28.
Bedognè, F., Montrasio, A., Sciesa, E. (1993) I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp.
Bedognè, F., and Sciesa, E. (1994) Asbestklüfte und ihre Mineralien im Serpentinit des Val Malenco (Sondrio, Italien). Mineralienfreund, 1994/4, 13-19.
Benetti, F. (1994) Guida mineralogica della Val Malenco. Grafica Mevio, Sondrio, 203 pp.
Bedognè, F., Sciesa, E., Vignola, P. (1999) Il “demantoide” della Valmalenco. Riv. Miner. It., 23, 4, 208-217.
Bedognè, F., Montrasio, A., Sciesa, E. (2006) I minerali della media-alta Valtellina, delle Orobie valtellinesi e della Val Poschiavo. Aggiornamenti sulle altre località della provincia di Sondrio. Bettini, Sondrio, 255 pp.


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