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Jarva-Varaka layered massif, Monchegorsk, Murmansk Oblast, Russiai
Regional Level Types
Jarva-Varaka layered massifMassif
MonchegorskComplex
Murmansk OblastOblast
RussiaCountry

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Latitude & Longitude (WGS84):
68° 0' 2'' North , 32° 44' 47'' East
Latitude & Longitude (decimal):
68.00056,32.74639
GRN:
N46E10
Type:
Massif
Köppen climate type:
Dfc : Subarctic climate
Mindat Locality ID:
437700
Long-form identifier:
mindat:1:2:437700:2
GUID (UUID V4):
0


The massif is 1.7 × 2.2 km in size with a thickness of about 2 km. The JVM consists of a differentiated series: norite, hypersthene diorite, pigeonite-augite diorite, quartz diorite, and granodiorite. Lithologies of the Massif contain granophyre (Qtz + Pl + Kfs) in different proportions. The dyke complex is represented by pyroxene-plagioclase porphyrites. Fracture tectonics is widely manifested within the JVM.
The host rocks for the Jarva-Varaka Massif are Archean aluminous gneisses of the Kola group with numerous sheet-like bodies of biotite granite, alaskite pegmatite, and pegmatoid leucoplagiogranite. Small and large veins of microcline granite cut the Massif and contain xenoliths of the massif rocks. Except for leucoplagiogranite, which is an A-type anorogenic granitoid, other granites are of the crustal-anatectic S-type. When we use the term “Jarva-Varak structure”, we mean the Massif itself and host gneisses and granitoids.
An age of the Massif is accepted as 2.5 Ga based on the age of quartz diorite obtained by the U-Pb ID-TIMS method on zircon (2496 ± 9 Ma) and the 2498 ± 6 Ma age of pigeonite-augitic diorite obtained by the U-Pb SHRIMP-II method on baddeleyite and zircon.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List


7 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:

ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
ⓘ Baddeleyite
Formula: ZrO2
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ 'Hypersthene'
Formula: (Mg,Fe)SiO3
ⓘ 'K Feldspar'
ⓘ Microcline
Formula: K(AlSi3O8)
ⓘ Monazite-(Ce)
Formula: Ce(PO4)
Description: Monazite-(Ce) from the sample of diatectite granite located among aluminous gneisses in the Jarva-Varaka structure contains multiple sets of twins along {100} and {001} with 180° disorientation relationships and plastically deformed domains with a maximum misorientation of 10°. Newly formed areas of recrystallization (neoblastic domains) that cut twins and plastically deformed subgrains were also documented.[[1]]
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Pigeonite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ 'Pyroxene Group'
Formula: ADSi2O6
ⓘ 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
ⓘBaddeleyite4.DE.35ZrO2
Group 8 - Phosphates, Arsenates and Vanadates
ⓘMonazite-(Ce)8.AD.50Ce(PO4)
Group 9 - Silicates
ⓘZircon9.AD.30Zr(SiO4)
ⓘPigeonite9.DA.10(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘMicrocline9.FA.30K(AlSi3O8)
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Hypersthene'-(Mg,Fe)SiO3
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'K Feldspar'-
ⓘ'Pyroxene Group'-ADSi2O6
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

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ⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
OOxygen
Oⓘ BaddeleyiteZrO2
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ Hypersthene(Mg,Fe)SiO3
Oⓘ MicroclineK(AlSi3O8)
Oⓘ Monazite-(Ce)Ce(PO4)
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ QuartzSiO2
Oⓘ ZirconZr(SiO4)
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Pyroxene GroupADSi2O6
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
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ⓘ Hypersthene(Mg,Fe)SiO3
Mgⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
AlAluminium
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ MicroclineK(AlSi3O8)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ Hypersthene(Mg,Fe)SiO3
Siⓘ MicroclineK(AlSi3O8)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ QuartzSiO2
Siⓘ ZirconZr(SiO4)
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Pyroxene GroupADSi2O6
PPhosphorus
Pⓘ Monazite-(Ce)Ce(PO4)
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
ClChlorine
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MicroclineK(AlSi3O8)
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ Hypersthene(Mg,Fe)SiO3
Feⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
ZrZirconium
Zrⓘ BaddeleyiteZrO2
Zrⓘ ZirconZr(SiO4)
CeCerium
Ceⓘ Monazite-(Ce)Ce(PO4)

Other Regions, Features and Areas containing this locality

Baltic Shield (Fennoscandian Shield)Shield
Eurasian PlateTectonic Plate
EuropeContinent
Finland/Russia
Soviet Union (1922-1991)Country

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

[1]Kaulina, Tatiana, Shilovskih, Vladimir, Nerovich, Lyudmila, Savchenko, Yevgeny, Bocharov, Vladimir, Lialina, Lyudmila, Il’chenko, Vadim (2023) Microstructural Deformation and the Age of Monazite-(Ce) from Diatectite Granite in the Jarva-Varaka Structure (Kola Region, Russia) Minerals, 13 (10) doi:10.3390/min13101325
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