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Dervio-Colico road tunnel, Dorio, Lecco Province, Lombardy, Italy

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Name(s) in local language(s):Tunnel stradale Dervio-Colico, Dorio, Provincia di Lecco, Lombardia, Italia
Latitude & Longitude (WGS84): 46° 6' 51'' North , 9° 20' 31'' East
Latitude & Longitude (decimal): 46.11407,9.34187
GeoHash:G#: u0nwkdf9c
Locality type:Tunnel
Köppen climate type:Dfc : Subarctic climate


Hydrocarbon-bearing cordierite crystals, partly altered to muscovite, embedded in quartz matrix have been evidenced during the construction of the Dervio-Colico road tunnel. The sillimanite-bearing quartz matrix forms lenses and veinlets in the hosting sillimanite-garnet-biotite schist.

Regions containing this locality

The Alps, Europe

Mountain Range - 2,242 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


4 valid minerals.

Detailed Mineral List:

'Biotite'
Reference: Mottana A., Fusi A., Bianchi Potenza B., Crespi R., Liborio G. (1983): Hydrocarbon-bearing cordierite from the Dervio-Colico road tunnel (Como, Italy). N. Jahrb. Mineral. Abh., 148, 2, 181-199; Rosaspina C. (1984): Cordierite negli scisti sillimanitici dell'Alto Lario Orientale. Riv. Mineral. Ital., 8, 3 (3-1984), 110.
Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Reference: Mottana A., Fusi A., Bianchi Potenza B., Crespi R., Liborio G. (1983): Hydrocarbon-bearing cordierite from the Dervio-Colico road tunnel (Como, Italy). N. Jahrb. Mineral. Abh., 148, 2, 181-199; Rosaspina C. (1984): Cordierite negli scisti sillimanitici dell'Alto Lario Orientale. Riv. Mineral. Ital., 8, 3 (3-1984), 110.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Mottana A., Fusi A., Bianchi Potenza B., Crespi R., Liborio G. (1983): Hydrocarbon-bearing cordierite from the Dervio-Colico road tunnel (Como, Italy). N. Jahrb. Mineral. Abh., 148, 2, 181-199; Rosaspina C. (1984): Cordierite negli scisti sillimanitici dell'Alto Lario Orientale. Riv. Mineral. Ital., 8, 3 (3-1984), 110.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Mottana A., Fusi A., Bianchi Potenza B., Crespi R., Liborio G. (1983): Hydrocarbon-bearing cordierite from the Dervio-Colico road tunnel (Como, Italy). N. Jahrb. Mineral. Abh., 148, 2, 181-199; Rosaspina C. (1984): Cordierite negli scisti sillimanitici dell'Alto Lario Orientale. Riv. Mineral. Ital., 8, 3 (3-1984), 110.
Quartz
Formula: SiO2
Reference: Mottana A., Fusi A., Bianchi Potenza B., Crespi R., Liborio G. (1983): Hydrocarbon-bearing cordierite from the Dervio-Colico road tunnel (Como, Italy). N. Jahrb. Mineral. Abh., 148, 2, 181-199; Rosaspina C. (1984): Cordierite negli scisti sillimanitici dell'Alto Lario Orientale. Riv. Mineral. Ital., 8, 3 (3-1984), 110.
Sillimanite
Formula: Al2(SiO4)O
Reference: Mottana A., Fusi A., Bianchi Potenza B., Crespi R., Liborio G. (1983): Hydrocarbon-bearing cordierite from the Dervio-Colico road tunnel (Como, Italy). N. Jahrb. Mineral. Abh., 148, 2, 181-199; Rosaspina C. (1984): Cordierite negli scisti sillimanitici dell'Alto Lario Orientale. Riv. Mineral. Ital., 8, 3 (3-1984), 110.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
'Quartz'4.DA.05SiO2
Group 9 - Silicates
'Cordierite'9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
'Muscovite'9.EC.15KAl2(AlSi3O10)(OH)2
'Sillimanite'9.AF.05Al2(SiO4)O
Unclassified Minerals, Rocks, etc.
'Biotite'-
'Garnet Group'-X3Z2(SiO4)3

List of minerals arranged by Dana 8th Edition classification

Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Sillimanite52.2.2a.1Al2(SiO4)O
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with Al substituted rings
Cordierite61.2.1.1(Mg,Fe)2Al3(AlSi5O18)
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.
'Biotite'-
'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
H MuscoviteKAl2(AlSi3O10)(OH)2
OOxygen
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
O Garnet GroupX3Z2(SiO4)3
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
O SillimaniteAl2(SiO4)O
MgMagnesium
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
AlAluminium
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al SillimaniteAl2(SiO4)O
SiSilicon
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
Si Garnet GroupX3Z2(SiO4)3
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si SillimaniteAl2(SiO4)O
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
FeIron
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleozoic
251.902 - 541 Ma



ID: 2347129
Metamorphe Gesteine, meist Metasedimente

Age: Phanerozoic (251.902 - 541 Ma)

Lithology: Gneiss and mica schist

Reference: Geological Institute. Geological Map of Switzerland 1:500,000. isbn: 3906723399. University of Bern. [49]

Paleozoic
251.902 - 541 Ma



ID: 3131490
Palaeozoic granulite

Age: Phanerozoic (251.902 - 541 Ma)

Description: high grade metamorphic

Lithology: Major:{granulite}, Minor{gneiss,greenschist,amphibolite}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Cambrian - Proterozoic
485.4 - 2500 Ma



ID: 3189284
Precambrian-Phanerozoic crystalline metamorphic rocks

Age: to Cambrian (485.4 - 2500 Ma)

Comments: Alps

Lithology: Crystalline metamorphic rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
- Mottana A., Fusi A., Bianchi Potenza B., Crespi R., Liborio G. (1983): Hydrocarbon-bearing cordierite from the Dervio-Colico road tunnel (Como, Italy). N. Jahrb. Mineral. Abh., 148, 2, 181-199.
- Rosaspina C. (1984): Cordierite negli scisti sillimanitici dell'Alto Lario Orientale. Riv. Mineral. Ital., 8, 3 (3-1984), 110.


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