SUPPORT US. If mindat.org is important to you, click here to donate to our Fall 2019 fundraiser!
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

Gobba di Rollin, Gobba di Rollin-Rocca di Verra ridge - Blu Lake area, Champoluc, Ayas, Ayas Valley, Aosta Valley, Italyi
Regional Level Types
Gobba di Rollin- not defined -
Gobba di Rollin-Rocca di Verra ridge - Blu Lake areaMountain Area
Champoluc- not defined -
AyasMunicipality
Ayas ValleyValley
Aosta ValleyAutonomous Region
ItalyCountry

This page is currently not sponsored. Click here to sponsor this page.
Key
Lock Map
Name(s) in local language(s):Gobba di Rollin (Bosse de Rollin; Dos de Rollin), Catena della Gobba di Rollin-Rocca di Verra - area del Lago Blu (Chaîne de la Bosse de Rollin-Rocca di Verra - région du Lac Bleu), Champoluc, Ayas, Val d'Ayas, Valle d'Aosta (Vallée d'Aoste), Italia
Location is approximate, estimate based on other nearby localities.
 
Latitude & Longitude (WGS84): 45° 53' 29'' North , 7° 44' 37'' East (est.)
Margin of Error:~0km
Köppen climate type:Dfc : Subarctic climate


Numerous rodingite dykes and lenses, rich in epidote, diopside, clinochlore, etc., are observed for an extension of about 2 km in the magnetite-bearing antigorite serpentinite, which forms the large east face of Gobba di Rollin.
They are particularly abundant in the 3689 m high spur, located to the east of the top of Gobba di Rollin, at the base of the wall below the dangerous hanging serac of Ghiacciaio di Ventina, and northeast of the point at 3738 m a.s.l.

The rondingite block found by Boeris (1909) on the western lateral moraine of Ghiacciaio Grande di Verra, in which he observed intersting crystal forms of epidote, probably originated from this area.

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
The Alps, EuropeMountain Range

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


8 valid minerals.

Detailed Mineral List:

Antigorite
Formula: Mg3(Si2O5)(OH)4
Reference: Dal Piaz, G.V. (2004) From the European continental margin to the Mesozoic Thetyan Ocean: A geological map of the upper Ayas Valley (Western Alps). In: Pasquaré, G., Venturini C.,(Eds), Groppelli G., (Ass.t Ed.), Mapping Geology in Italy. APAT - Agenzia per la Protenzione dell'Ambiente e per i Servizi Tecnici, Dipartimento Difesa del Suolo - Servizio Geologico d’Italia, S.EL.CA., Firenze, pages 267-272.
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Reference: Dal Piaz, G.V. (1967) Le "granatiti" (rodingiti l.s.) nelle serpentine delle Alpi occidentali italiane. Memorie della Società Geologica Italiana, 6, 267-313.
Clinohumite
Formula: Mg9(SiO4)4F2
Reference: Dal Piaz, G.V. (2004) From the European continental margin to the Mesozoic Thetyan Ocean: A geological map of the upper Ayas Valley (Western Alps). In: Pasquaré, G., Venturini C.,(Eds), Groppelli G., (Ass.t Ed.), Mapping Geology in Italy. APAT - Agenzia per la Protenzione dell'Ambiente e per i Servizi Tecnici, Dipartimento Difesa del Suolo - Servizio Geologico d’Italia, S.EL.CA., Firenze, pages 267-272.
Clinohumite var: Titanclinohumite
Formula: Mg9(SiO4)4F2
Reference: Dal Piaz, G.V. (2004) From the European continental margin to the Mesozoic Thetyan Ocean: A geological map of the upper Ayas Valley (Western Alps). In: Pasquaré, G., Venturini C.,(Eds), Groppelli G., (Ass.t Ed.), Mapping Geology in Italy. APAT - Agenzia per la Protenzione dell'Ambiente e per i Servizi Tecnici, Dipartimento Difesa del Suolo - Servizio Geologico d’Italia, S.EL.CA., Firenze, pages 267-272.
Diopside
Formula: CaMgSi2O6
Reference: Dal Piaz, G.V. (1967) Le "granatiti" (rodingiti l.s.) nelle serpentine delle Alpi occidentali italiane. Memorie della Società Geologica Italiana, 6, 267-313.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Dal Piaz, G.V. (1967) Le "granatiti" (rodingiti l.s.) nelle serpentine delle Alpi occidentali italiane. Memorie della Società Geologica Italiana, 6, 267-313.
Forsterite
Formula: Mg2SiO4
Reference: Dal Piaz, G.V. (2004) From the European continental margin to the Mesozoic Thetyan Ocean: A geological map of the upper Ayas Valley (Western Alps). In: Pasquaré, G., Venturini C.,(Eds), Groppelli G., (Ass.t Ed.), Mapping Geology in Italy. APAT - Agenzia per la Protenzione dell'Ambiente e per i Servizi Tecnici, Dipartimento Difesa del Suolo - Servizio Geologico d’Italia, S.EL.CA., Firenze, pages 267-272.
Grossular
Formula: Ca3Al2(SiO4)3
Reference: Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007) Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" di Alba, Ed., Alba, 607 pp.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Dal Piaz, G.V. (2004) From the European continental margin to the Mesozoic Thetyan Ocean: A geological map of the upper Ayas Valley (Western Alps). In: Pasquaré, G., Venturini C.,(Eds), Groppelli G., (Ass.t Ed.), Mapping Geology in Italy. APAT - Agenzia per la Protenzione dell'Ambiente e per i Servizi Tecnici, Dipartimento Difesa del Suolo - Servizio Geologico d’Italia, S.EL.CA., Firenze, pages 267-272.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Magnetite4.BB.05Fe2+Fe3+2O4
Group 9 - Silicates
Antigorite9.ED.15Mg3(Si2O5)(OH)4
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
Clinohumite9.AF.55Mg9(SiO4)4F2
var: Titanclinohumite9.AF.55Mg9(SiO4)4F2
Diopside9.DA.15CaMgSi2O6
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Forsterite9.AC.05Mg2SiO4
Grossular9.AD.25Ca3Al2(SiO4)3

List of minerals arranged by Dana 8th Edition classification

Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
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
Grossular51.4.3b.2Ca3Al2(SiO4)3
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Clinohumite52.3.2d.1Mg9(SiO4)4F2
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
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
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Clinochlore71.4.1.4Mg5Al(AlSi3O10)(OH)8
Unclassified Minerals, Mixtures, etc.
Clinohumite
var: Titanclinohumite
-Mg9(SiO4)4F2

List of minerals for each chemical element

HHydrogen
H ClinochloreMg5Al(AlSi3O10)(OH)8
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H AntigoriteMg3(Si2O5)(OH)4
OOxygen
O ClinochloreMg5Al(AlSi3O10)(OH)8
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O DiopsideCaMgSi2O6
O GrossularCa3Al2(SiO4)3
O ForsteriteMg2SiO4
O AntigoriteMg3(Si2O5)(OH)4
O MagnetiteFe2+Fe23+O4
O Clinohumite (var: Titanclinohumite)Mg9(SiO4)4F2
O ClinohumiteMg9(SiO4)4F2
FFluorine
F Clinohumite (var: Titanclinohumite)Mg9(SiO4)4F2
F ClinohumiteMg9(SiO4)4F2
MgMagnesium
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
Mg DiopsideCaMgSi2O6
Mg ForsteriteMg2SiO4
Mg AntigoriteMg3(Si2O5)(OH)4
Mg Clinohumite (var: Titanclinohumite)Mg9(SiO4)4F2
Mg ClinohumiteMg9(SiO4)4F2
AlAluminium
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al GrossularCa3Al2(SiO4)3
SiSilicon
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si DiopsideCaMgSi2O6
Si GrossularCa3Al2(SiO4)3
Si ForsteriteMg2SiO4
Si AntigoriteMg3(Si2O5)(OH)4
Si Clinohumite (var: Titanclinohumite)Mg9(SiO4)4F2
Si ClinohumiteMg9(SiO4)4F2
CaCalcium
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca DiopsideCaMgSi2O6
Ca GrossularCa3Al2(SiO4)3
FeIron
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe MagnetiteFe2+Fe23+O4

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Boeris, G. (1909) Sull'epidoto della valle di Ayas. Memorie della Reale Accademia delle Scienze dell'Istituto di Bologna, Classe di scienze fisiche, serie 6, 6, 145-155.
Dal Piaz, G.V. (1967) Le "granatiti" (rodingiti l.s.) nelle serpentine delle Alpi occidentali italiane. Memorie della Società Geologica Italiana, 6, 267-313.
Dal Piaz, G.V. (2004) From the European continental margin to the Mesozoic Thetyan Ocean: A geological map of the upper Ayas Valley (Western Alps). In: Pasquaré, G., Venturini C.,(Eds), Groppelli G., (Ass.t Ed.), Mapping Geology in Italy. APAT - Agenzia per la Protenzione dell'Ambiente e per i Servizi Tecnici, Dipartimento Difesa del Suolo - Servizio Geologico d’Italia, S.EL.CA., Firenze, pages 267-272.
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007) Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" di Alba, Ed., Alba, 607 pp.


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.
 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: November 13, 2019 11:43:13 Page generated: February 7, 2019 14:13:54
Go to top of page