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Internal Ligurian Units, Genoa, Liguria, Italyi
Regional Level Types
Internal Ligurian UnitsFormation
GenoaMetropolitan City
LiguriaAdministrative Region
ItalyCountry

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Latitude & Longitude (WGS84):
44° 25' North , 9° 19' East
Latitude & Longitude (decimal):
44.41667,9.31667
GRN:
N30E05
Type:
Formation
Köppen climate type:
Csb : Warm-summer Mediterranean climate
Mindat Locality ID:
440262
Long-form identifier:
mindat:1:2:440262:9
GUID (UUID V4):
0


Internal Ligurian Units are considered deformed and metamorphosed fragments of the Ligure-Piemontese oceanic basin. In this paper, we report on the temperature and pressure conditions of the metamorphic peak for four Internal Ligurian Units, estimated using different geothermometers and geobarometers based on the white mica and chlorite compositions. These minerals were formed during the D1 deformation phase in the pre-Oligocene. The results indicate that the Portello and Gottero units are both characterized by metamorphic conditions pertaining to low blueschists facies, while the Colli-Tavarone and Bracco-Val Graveglia Units show a lower metamorphic imprint that produces assemblages of prehnite-pumpellyite facies. The estimated geothermal gradient for the metamorphic peak achieved by the analyzed Internal Ligurian Units during the D1 phase is 7–15 °C/Km, which is indicative of deformation in a subduction setting. Under these conditions, the D1 phase developed in these units as a result of underplating at the base of the accretionary wedge during the closure of the Ligure-Piemontese basin. These data indicate a close geodynamic correlation among the Internal Ligurian Units and the ophiolite-bearing units of the Alps.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


9 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:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Amesite
Formula: Mg2Al(AlSiO5)(OH)4
ⓘ Calcite
Formula: CaCO3
ⓘ Chamosite
Formula: (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
ⓘ Chamosite var. Daphnite
Formula: (Fe,Mg)5Al(Si,Al)4O10(OH)8
ⓘ 'Chlorite Group'
ⓘ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘ Prehnite
Formula: Ca2Al2Si3O10(OH)2
ⓘ 'Pumpellyite Subgroup'
Formula: Ca2XAl2[Si2O6(OH)][SiO4](OH)2A
ⓘ Quartz
Formula: SiO2
ⓘ Zircon
Formula: Zr(SiO4)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 9 - Silicates
ⓘZircon9.AD.30Zr(SiO4)
ⓘPrehnite9.DP.20Ca2Al2Si3O10(OH)2
ⓘMuscovite
var. Illite		9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘ9.EC.15KAl2(AlSi3O10)(OH)2
ⓘChamosite9.EC.55(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
ⓘClinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
ⓘChamosite
var. Daphnite		9.EC.55(Fe,Mg)5Al(Si,Al)4O10(OH)8
ⓘAmesite9.ED.15Mg2Al(AlSiO5)(OH)4
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Chlorite Group'-
ⓘ'Pumpellyite Subgroup'-Ca2XAl2[Si2O6(OH)][SiO4](OH)2A

List of minerals for each chemical element

HHydrogen
Hⓘ AmesiteMg2Al(AlSiO5)(OH)4
Hⓘ Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Hⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Hⓘ Chamosite var. Daphnite(Fe,Mg)5Al(Si,Al)4O10(OH)8
Hⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ PrehniteCa2Al2Si3O10(OH)2
Hⓘ Pumpellyite SubgroupCa2XAl2[Si2O6(OH)][SiO4](OH)2A
CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ AmesiteMg2Al(AlSiO5)(OH)4
Oⓘ CalciteCaCO3
Oⓘ Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Oⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Oⓘ Chamosite var. Daphnite(Fe,Mg)5Al(Si,Al)4O10(OH)8
Oⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ PrehniteCa2Al2Si3O10(OH)2
Oⓘ Pumpellyite SubgroupCa2XAl2[Si2O6(OH)][SiO4](OH)2A
Oⓘ QuartzSiO2
Oⓘ ZirconZr(SiO4)
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
MgMagnesium
Mgⓘ AmesiteMg2Al(AlSiO5)(OH)4
Mgⓘ Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Mgⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgⓘ Chamosite var. Daphnite(Fe,Mg)5Al(Si,Al)4O10(OH)8
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ AmesiteMg2Al(AlSiO5)(OH)4
Alⓘ Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Alⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Alⓘ Chamosite var. Daphnite(Fe,Mg)5Al(Si,Al)4O10(OH)8
Alⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ PrehniteCa2Al2Si3O10(OH)2
Alⓘ Pumpellyite SubgroupCa2XAl2[Si2O6(OH)][SiO4](OH)2A
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ AmesiteMg2Al(AlSiO5)(OH)4
Siⓘ Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Siⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Siⓘ Chamosite var. Daphnite(Fe,Mg)5Al(Si,Al)4O10(OH)8
Siⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ PrehniteCa2Al2Si3O10(OH)2
Siⓘ Pumpellyite SubgroupCa2XAl2[Si2O6(OH)][SiO4](OH)2A
Siⓘ QuartzSiO2
Siⓘ ZirconZr(SiO4)
KPotassium
Kⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ PrehniteCa2Al2Si3O10(OH)2
Caⓘ Pumpellyite SubgroupCa2XAl2[Si2O6(OH)][SiO4](OH)2A
FeIron
Feⓘ Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Feⓘ Chamosite var. Daphnite(Fe,Mg)5Al(Si,Al)4O10(OH)8
ZrZirconium
Zrⓘ ZirconZr(SiO4)

Other Regions, Features and Areas containing this locality

Eurasian Plate
EuropeContinent

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References

[1]Sanità, Edoardo, Di Rosa, Maria, Marroni, Michele, Meneghini, Francesca, Pandolfi, Luca (2024) Insights into the Subduction of the Ligure-Piemontese Oceanic Basin: New Constraints from the Metamorphism in the Internal Ligurian Units (Northern Apennines, Italy) Minerals, 14 (1) doi:10.3390/min14010064
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