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Repanga Island (Cuvier Island), Thames-Coromandel District, Waikato Region, New Zealandi
Regional Level Types
Repanga Island (Cuvier Island)Island
Thames-Coromandel DistrictDistrict
Waikato RegionRegion
New ZealandCountry

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PhotosMapsSearch
Type:
Island
Mindat Locality ID:
28123
Long-form identifier:
mindat:1:2:28123:7
GUID (UUID V4):
d47d048a-9181-4d1f-9ee9-3b526512f030


Feruvite was formed by hydrothermal replacement of silicates in a pegmatitic rock.

The island is a wildlife sanctuary.

Interest in the geology of the island is centred on two rare species found here. Neither appears to be specimen grade material, at least described in the sources, and being a conservation area is off limits anyway.

Grandidierite was described by (Black, 1970), at the time only found on Madagascar and Cuvier Island. It is a magnesium aluminium borosilicate. It was found at two locations, both is an aureole surrounding small diorite stocks. At Blanket Bay it was found associated with hypersthene-cordierite-biotite-spessartine-andesine-pyrrhotite, and at Landing Bay with hypersthene-biotite-andesine-orthoclase-quartz-rutile-magnetite.

The island is the type locality of feruvite, and at the time of writing (2018) is found at fourteen locations worldwide on Mindat. It is named after its crystal and chemical similarity to uvite. It is found as a light grey core surrounded by dravite, and overprinted by schorl/dravite, all black-brown members of the tourmaline group. There is no indication of crystal specimens with the material found as grains, aggregating into dark patches at 30% volume of a tourmalised rock. It is associated with quartz, microcline, chlorapatite, and pyrite. It is the iron analog of uvite, and the calcium analog of schorl.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


15 valid minerals. 1 (TL) - type locality of 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)
ⓘ Albite var. Andesine
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
ⓘ 'Axinite Group'
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Chlorapatite
Formula: Ca5(PO4)3Cl
ⓘ Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
ⓘ Dravite
Formula: NaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘ Feruvite (TL)
Formula: CaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)
Type Locality:
ⓘ Grandidierite
Formula: (Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Description: small subhedral crystals less than 0.1 mm in diameter and constituting less than 1 modal % of the hornfels.
ⓘ 'Hypersthene'
Formula: (Mg,Fe)SiO3
ⓘ 'K Feldspar'
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Microcline
Formula: K(AlSi3O8)
ⓘ Orthoclase
Formula: K(AlSi3O8)
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
ⓘ Rutile
Formula: TiO2
ⓘ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘ Spessartine
Formula: Mn2+3Al2(SiO4)3
ⓘ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘQuartz4.DA.05SiO2
ⓘRutile4.DB.05TiO2
Group 8 - Phosphates, Arsenates and Vanadates
ⓘChlorapatite8.BN.05Ca5(PO4)3Cl
Group 9 - Silicates
ⓘSpessartine9.AD.25Mn2+3Al2(SiO4)3
ⓘGrandidierite9.AJ.05(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
ⓘCordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
ⓘDravite9.CK.05NaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘFeruvite (TL)9.CK.05CaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)
ⓘSchorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘMicrocline9.FA.30K(AlSi3O8)
ⓘOrthoclase9.FA.30K(AlSi3O8)
ⓘAlbite9.FA.35Na(AlSi3O8)
ⓘvar. Andesine9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Unclassified
ⓘ'Hypersthene'-(Mg,Fe)SiO3
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
ⓘ'K Feldspar'-
ⓘ'Axinite Group'-

List of minerals for each chemical element

HHydrogen
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Hⓘ FeruviteCaFe32+(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)
Hⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
BBoron
Bⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Bⓘ FeruviteCaFe32+(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)
Bⓘ Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Bⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Bⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ ChlorapatiteCa5(PO4)3Cl
Oⓘ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Oⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Oⓘ FeruviteCaFe32+(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)
Oⓘ Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Oⓘ Hypersthene(Mg,Fe)SiO3
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MicroclineK(AlSi3O8)
Oⓘ OrthoclaseK(AlSi3O8)
Oⓘ QuartzSiO2
Oⓘ RutileTiO2
Oⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oⓘ SpessartineMn32+Al2(SiO4)3
Oⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Naⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Naⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mgⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Mgⓘ FeruviteCaFe32+(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)
Mgⓘ Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Mgⓘ Hypersthene(Mg,Fe)SiO3
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Alⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Alⓘ FeruviteCaFe32+(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)
Alⓘ Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Alⓘ MicroclineK(AlSi3O8)
Alⓘ OrthoclaseK(AlSi3O8)
Alⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alⓘ SpessartineMn32+Al2(SiO4)3
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Siⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Siⓘ FeruviteCaFe32+(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)
Siⓘ Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Siⓘ Hypersthene(Mg,Fe)SiO3
Siⓘ MicroclineK(AlSi3O8)
Siⓘ OrthoclaseK(AlSi3O8)
Siⓘ QuartzSiO2
Siⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siⓘ SpessartineMn32+Al2(SiO4)3
PPhosphorus
Pⓘ ChlorapatiteCa5(PO4)3Cl
SSulfur
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
ClChlorine
Clⓘ ChlorapatiteCa5(PO4)3Cl
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MicroclineK(AlSi3O8)
Kⓘ OrthoclaseK(AlSi3O8)
CaCalcium
Caⓘ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Caⓘ ChlorapatiteCa5(PO4)3Cl
Caⓘ FeruviteCaFe32+(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ RutileTiO2
MnManganese
Mnⓘ SpessartineMn32+Al2(SiO4)3
FeIron
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Feⓘ FeruviteCaFe32+(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)
Feⓘ Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Feⓘ Hypersthene(Mg,Fe)SiO3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Cuvier_Island
Wikidata ID:Q171969


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.

References

Reed, J.J. (1963) Tourmalised rocks on Cuvier Island. New Zealand Journal of Geology and Geophysics, 6:5, 714-715.
Black, P.M. (1967) Petrology of the Cuvier and Paritu plutons and their metamorphic aureoles. Unpublished Ph.D. thesis, University of Auckland, 354 pages.
Black, Philippa M. (1970) Grandidierite from Cuvier Island, New Zealand. Mineralogical Magazine, 37 (289) 615-617 doi:10.1180/minmag.1970.037.289.12
Grice, Joel D., Robinson, George W. (1989) Feruvite, a new member of the tourmaline group, and its crystal structure. The Canadian Mineralogist, 27 (2) 199-203
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