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Montecchio Cave, Semproniano, Grosseto Province, Tuscany, Italyi
Regional Level Types
Montecchio CaveCave
SempronianoCommune
Grosseto ProvinceProvince
TuscanyRegion
ItalyCountry

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Latitude & Longitude (WGS84):
42° 42' 16'' North , 11° 30' 25'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Capanne101 (2014)3.7km
Semproniano487 (2014)3.9km
Saturnia292 (2014)4.2km
Poggio Murella287 (2014)4.8km
Catabbio203 (2014)4.9km
Mindat Locality ID:
266149
Long-form identifier:
mindat:1:2:266149:3
GUID (UUID V4):
0
Other Languages:
Italian:
Grotta di Montecchio, Semproniano, Provincia di Grosseto, Toscana, Italia


Montecchio cave opens at 320 m asl on the south slope of Poggio di Montecchio, in a small outcrop of Jurassic "Calcare Massiccio" (Lower Hettangian), close to the Albegna River. The cave is located in a territory rich in thermal waters, including the famous Saturnia thermal springs (situated 4 km to the south from the cave in the municipal territory of Manciano).

This cave, with a development of over 1700 m, is characterised by the presence of a thermal aquifer (temperature above 30°C and high sulphate content) at a depth of 100 m below the entrance. The cave hosts large gypsum deposits, starting from 40 m below the entrance, originated from the reaction between sulphuric acid and the carbonate hostrock. The lower part of the cave hosts calcite raft deposits over 1 m thick.

Samples of weathering products have been recently analysed (De Waele et al., 2013). Residual minerals (quartz, feldspar), some oxides and hydroxides (hematite, goethite, and böhmite), weathering silicate products (chlorite and illite) have been identified. The products of acid weathering are particularly interesting, like those derived from calcite (gypsum) and from clays (alunite, jarosite, and kaolinite).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


10 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Alunite
Formula: KAl3(SO4)2(OH)6
References:
Böhmite
Formula: AlO(OH)
References:
Calcite
Formula: CaCO3
References:
'Chlorite Group'
'Feldspar Group'
Goethite
Formula: Fe3+O(OH)
References:
Gypsum
Formula: CaSO4 · 2H2O
References:
Hematite
Formula: Fe2O3
References:
Jarosite
Formula: KFe3+3(SO4)2(OH)6
References:
Kaolinite
Formula: Al2(Si2O5)(OH)4
References:
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Muscovite var. Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Quartz
Formula: SiO2
References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Goethite4.00.Fe3+O(OH)
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
Böhmite4.FE.15AlO(OH)
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Alunite7.BC.10KAl3(SO4)2(OH)6
Jarosite7.BC.10KFe3+3(SO4)2(OH)6
Gypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
Muscovite
var. Illite
9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
9.EC.15KAl2(AlSi3O10)(OH)2
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Unclassified
'Chlorite Group'-
'Feldspar Group'-

List of minerals for each chemical element

HHydrogen
H AluniteKAl3(SO4)2(OH)6
H BöhmiteAlO(OH)
H GoethiteFe3+O(OH)
H GypsumCaSO4 · 2H2O
H Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
H JarositeKFe33+(SO4)2(OH)6
H KaoliniteAl2(Si2O5)(OH)4
H MuscoviteKAl2(AlSi3O10)(OH)2
CCarbon
C CalciteCaCO3
OOxygen
O AluniteKAl3(SO4)2(OH)6
O BöhmiteAlO(OH)
O CalciteCaCO3
O GoethiteFe3+O(OH)
O GypsumCaSO4 · 2H2O
O HematiteFe2O3
O Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
O JarositeKFe33+(SO4)2(OH)6
O KaoliniteAl2(Si2O5)(OH)4
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
AlAluminium
Al AluniteKAl3(SO4)2(OH)6
Al BöhmiteAlO(OH)
Al Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Al KaoliniteAl2(Si2O5)(OH)4
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Si KaoliniteAl2(Si2O5)(OH)4
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
SSulfur
S AluniteKAl3(SO4)2(OH)6
S GypsumCaSO4 · 2H2O
S JarositeKFe33+(SO4)2(OH)6
KPotassium
K AluniteKAl3(SO4)2(OH)6
K Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
K JarositeKFe33+(SO4)2(OH)6
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca CalciteCaCO3
Ca GypsumCaSO4 · 2H2O
FeIron
Fe GoethiteFe3+O(OH)
Fe HematiteFe2O3
Fe JarositeKFe33+(SO4)2(OH)6

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate
EuropeContinent

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

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