Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Lake Jänisjärvi, Republic of Karelia, Russiai
Regional Level Types
Lake JänisjärviImpact Crater
Republic of KareliaRepublic
RussiaCountry

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01684380017272724713638.jpg
View of the Karelian peat cutting area, in 1900.

Lake Jänisjärvi, Republic of Karelia, Russia
01684380017272724713638.jpg
View of the Karelian peat cutting area, in 1900.

Lake Jänisjärvi, Republic of Karelia, Russia
01684380017272724713638.jpg
View of the Karelian peat cutting area, in 1900.

Lake Jänisjärvi, Republic of Karelia, Russia
Type:
Impact Crater
Age:
682 ± 4 Ma
Geologic Time:
Cryogenian
Reference for age:
Zamiatina, Daria A., Dmitry A. Zamyatin, and Georgii B. Mikhalevskii. (2022) "Ballen Quartz in Jänisjärvi Impact Melt Rock with High Concentrations of Fe, Mg, and Al: EPMA, EDS, EBSD, CL, and Raman Spectroscopy" Minerals 12, no. 7: 886.
Mindat Locality ID:
42726
Long-form identifier:
mindat:1:2:42726:4
GUID (UUID V4):
0


Astrobleme (impact crater).
The diameter of the crater is 14 km. Impactites are exposed on the islands found in the center of the lake and on the western cape, represented by impact melt rocks and suevites. The target rocks are composed of the Lower Proterozoic quartz-biotite schists of the Ladoga Series (Pälkjärvi and Naatselkä formation).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


15 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:

ⓘ Andalusite
Formula: Al2(SiO4)O
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ 'Chlorite Group'
ⓘ Coesite
Formula: SiO2
ⓘ Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
ⓘ Cristobalite
Formula: SiO2
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ Graphite
Formula: C
ⓘ 'Hypersthene'
Formula: (Mg,Fe)SiO3
ⓘ Ilmenite
Formula: Fe2+TiO3
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Native Iron
Formula: Fe
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ Quartz
Formula: SiO2
Habit: Ballen quartz
ⓘ Sanidine
Formula: K(AlSi3O8)
ⓘ Staurolite
Formula: Fe2+2Al9Si4O23(OH)
ⓘ Stishovite
Formula: SiO2
ⓘ Titanite
Formula: CaTi(SiO4)O
ⓘ Tridymite
Formula: SiO2
ⓘ Wüstite
Formula: FeO

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Iron1.AE.05Fe
ⓘGraphite1.CB.05aC
Group 4 - Oxides and Hydroxides
ⓘWüstite4.AB.25FeO
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘQuartz4.DA.05SiO2
ⓘTridymite4.DA.10SiO2
ⓘCristobalite4.DA.15SiO2
ⓘCoesite4.DA.35SiO2
ⓘStishovite4.DA.40SiO2
Group 9 - Silicates
ⓘAndalusite9.AF.10Al2(SiO4)O
ⓘStaurolite9.AF.30Fe2+2Al9Si4O23(OH)
ⓘTitanite9.AG.15CaTi(SiO4)O
ⓘCordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
ⓘSanidine9.FA.30K(AlSi3O8)
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Chlorite Group'-
ⓘ'Hypersthene'-(Mg,Fe)SiO3
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'Garnet Group'-X3Z2(SiO4)3

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ⓘ StauroliteFe22+Al9Si4O23(OH)
CCarbon
Cⓘ GraphiteC
OOxygen
Oⓘ AndalusiteAl2(SiO4)O
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ CoesiteSiO2
Oⓘ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Oⓘ CristobaliteSiO2
Oⓘ Hypersthene(Mg,Fe)SiO3
Oⓘ IlmeniteFe2+TiO3
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ QuartzSiO2
Oⓘ SanidineK(AlSi3O8)
Oⓘ StauroliteFe22+Al9Si4O23(OH)
Oⓘ StishoviteSiO2
Oⓘ TitaniteCaTi(SiO4)O
Oⓘ TridymiteSiO2
Oⓘ WüstiteFeO
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Garnet GroupX3Z2(SiO4)3
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mgⓘ Hypersthene(Mg,Fe)SiO3
AlAluminium
Alⓘ AndalusiteAl2(SiO4)O
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Alⓘ SanidineK(AlSi3O8)
Alⓘ StauroliteFe22+Al9Si4O23(OH)
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ AndalusiteAl2(SiO4)O
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ CoesiteSiO2
Siⓘ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Siⓘ CristobaliteSiO2
Siⓘ Hypersthene(Mg,Fe)SiO3
Siⓘ QuartzSiO2
Siⓘ SanidineK(AlSi3O8)
Siⓘ StauroliteFe22+Al9Si4O23(OH)
Siⓘ StishoviteSiO2
Siⓘ TitaniteCaTi(SiO4)O
Siⓘ TridymiteSiO2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Garnet GroupX3Z2(SiO4)3
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ SanidineK(AlSi3O8)
CaCalcium
Caⓘ TitaniteCaTi(SiO4)O
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ IlmeniteFe2+TiO3
Tiⓘ TitaniteCaTi(SiO4)O
FeIron
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Feⓘ Hypersthene(Mg,Fe)SiO3
Feⓘ IlmeniteFe2+TiO3
Feⓘ Native IronFe
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ StauroliteFe22+Al9Si4O23(OH)
Feⓘ WüstiteFeO

Fossils

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

www.unb.ca (n.d.) http://www.unb.ca/passc/ImpactDatabase/images/janisjarvi.htm
Zamiatina, D.A., Zamyatin, D.A., Mikhalevskii, G.B. (2022): Ballen Quartz in Jänisjärvi Impact Melt Rock with High Concentrations of Fe, Mg, and Al: EPMA, EDS, EBSD, CL, and Raman Spectroscopy. Minerals: 12(7): 886. https://doi.org/10.3390/min12070886
Zamiatina, D.A., Zamyatin, D.A., Mikhalevskii, G.B., Chebikin, N.S. (2023): Silica Polymorphs Formation in the Jänisjärvi Impact Structure: Tridymite, Cristobalite, Quartz, Trace Stishovite and Coesite. Minerals: 13: 686.
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