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Mogurazawa mine, Kiryu City, Gunma Prefecture, Japani
Regional Level Types
Mogurazawa mineMine
Kiryu CityCity
Gunma PrefecturePrefecture
JapanCountry

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08215490017272002025035.jpg
Entrance of adit in Mogurazawa Mine

Mogurazawa mine, Kiryu City, Gunma Prefecture, Japan
01915690017271925317882.jpg
Nagashimalite

Mogurazawa mine, Kiryu City, Gunma Prefecture, Japan
07047140017271981097765.jpg
Suzukiite

Mogurazawa mine, Kiryu City, Gunma Prefecture, Japan
08215490017272002025035.jpg
Entrance of adit in Mogurazawa Mine

Mogurazawa mine, Kiryu City, Gunma Prefecture, Japan
01915690017271925317882.jpg
Nagashimalite

Mogurazawa mine, Kiryu City, Gunma Prefecture, Japan
06300090017361185562441.jpg
Suzukiite

Mogurazawa mine, Kiryu City, Gunma Prefecture, Japan
08215490017272002025035.jpg
Entrance of adit in Mogurazawa Mine

Mogurazawa mine, Kiryu City, Gunma Prefecture, Japan
01915690017271925317882.jpg
Nagashimalite

Mogurazawa mine, Kiryu City, Gunma Prefecture, Japan
Latitude & Longitude (WGS84):
36° 26' 22'' North , 139° 22' 59'' East
Latitude & Longitude (decimal):
36.43972,139.38306
GRN:
N25E80
Type:
Mine
Age:
201.3 ± 0.2 to ~145.0 Ma
Geologic Time:
Jurassic
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Kiryū110,219 (2017)6.3km
Ōmamachō-ōmama21,286 (2017)9.7km
Ashikaga159,671 (2017)13.3km
Ōta152,104 (2017)15.6km
Tanuma28,723 (2017)19.7km
Mindat Locality ID:
2187
Long-form identifier:
mindat:1:2:2187:9
GUID (UUID V4):
0
Name(s) in local language(s):
茂倉沢鉱山，群馬県 桐生市


Metasedimentary manganese ore hosted in Jurassic chert. Famous for its tiny quantities of rare vanadium-bearing minerals.

The Mogurazawa mine was one such manganese mine, with three known deposits: Minamiiri, Mujina, and Funegazawa. These operations continued until the 1950s. All studied materials were collected from the dumps of the Minamiiri deposit.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


29 valid minerals. 7 (TL) - type locality of valid minerals.

Rock Types Recorded


Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Akasakaite-(Ce) (TL)
Formula: (CaCe)(AlAlMn2+)O[Si2O7][SiO4](OH)
Type Locality:
ⓘ Akasakaite-(La) (TL)
Formula: (CaLa)(AlAlMn2+)O[Si2O7][SiO4](OH)
Type Locality:
ⓘ Alabandite
Formula: MnS
ⓘ Alleghanyite
Formula: Mn2+5(SiO4)2(OH)2
ⓘ Baryte
Formula: BaSO4
ⓘ Bornite
Formula: Cu5FeS4
ⓘ Calcite
Formula: CaCO3
ⓘ Calcite var. Manganese-bearing Calcite
Formula: (Ca,Mn)CO3
ⓘ Cymrite
Formula: BaAl2Si2(O,OH)8 · H2O
ⓘ Digenite
Formula: Cu9S5
ⓘ Gersdorffite
Formula: NiAsS
ⓘ Hausmannite
Formula: Mn2+Mn3+2O4
ⓘ Helvine
Formula: Be3Mn2+4(SiO4)3S
ⓘ Jacobsite
Formula: Mn2+Fe3+2O4
ⓘ 'Manganese Oxides'
ⓘ Manganosite
Formula: MnO
ⓘ Mannardite
Formula: Ba(Ti4+6V3+2)O16
ⓘ Nagashimalite (TL)
Formula: Ba4(V,Ti)4B2Si8O27(O,OH)2Cl
Type Locality:
ⓘ Pyrochroite
Formula: Mn(OH)2
ⓘ Quartz
Formula: SiO2
ⓘ Rhodochrosite
Formula: MnCO3
References:
Am Min 66:638
Matsubara Satoshi, Kato, Akira (1980) Nagashimalite, Ba4(V3+,Ti)4[(O,OH)2|Cl|Si8B2O27], a new mineral from the Mogurazawa mine, gumma prefecture, Japan. Mineralogical Journal, 10 (3) 122-130 doi:10.2465/minerj.10.122
加藤昭, & 松原聰. (1980). 本邦産マンガン硼酸塩鉱物. 鉱物学雜誌, 14(Special3), 86-97.
Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
Min.Journ.Japan (1982) 11, 15-20
Nagashima, Mariko; Nishio-Hamane, Daisuke; Ohnishi, Masayuki; Miyajima, Hiroshi; Harada, Akira (2026) New epidote-supergroup minerals from the Mogurazawa mine, Gunma, Japan: akasakaite-(Ce), akasakaite-(La), vanadoakasakaite-(Ce), and vanadoakasakaite-(La). Journal of Mineralogical and Petrological Sciences, 121 (1). 250927
ⓘ Rhodonite
Formula: CaMn3Mn[Si5O15]
ⓘ Roscoelite
Formula: KV3+2(AlSi3O10)(OH)2
ⓘ Spessartine
Formula: Mn2+3Al2(SiO4)3
ⓘ Suzukiite (TL)
Formula: BaVSi2O7
Type Locality:
ⓘ Tephroite
Formula: Mn2+2(SiO4)
ⓘ 'Tetrahedrite Subgroup'
Formula: Cu6(Cu4C2+2)Sb4S12S
ⓘ Vanadoakasakaite-(Ce) (TL)
Formula: (CaCe)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Type Locality:
ⓘ Vanadoakasakaite-(La) (TL)
Formula: (CaLa)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Type Locality:
ⓘ Vanadoandrosite-(La) (TL)
Formula: Mn2+La(V3+AlMn2+)(Si2O7)(SiO4)O(OH)
Type Locality:
ⓘ Wiserite
Formula: (Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4Cl
ⓘ Zoltaiite
Formula: BaV4+2V3+12(SiO4)2O19

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘDigenite2.BA.10Cu9S5
ⓘBornite2.BA.15Cu5FeS4
ⓘAlabandite2.CD.10MnS
ⓘGersdorffite2.EB.25NiAsS
ⓘ'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
Group 4 - Oxides and Hydroxides
ⓘManganosite4.AB.25MnO
ⓘJacobsite4.BB.05Mn2+Fe3+2O4
ⓘHausmannite4.BB.10Mn2+Mn3+2O4
ⓘQuartz4.DA.05SiO2
ⓘMannardite4.DK.05bBa(Ti4+6V3+2)O16
ⓘPyrochroite4.FE.05Mn(OH)2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘvar. Manganese-bearing Calcite5.AB.05(Ca,Mn)CO3
ⓘRhodochrosite5.AB.05MnCO3
Group 6 - Borates
ⓘWiserite6.BA.20(Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4Cl
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘBaryte7.AD.35BaSO4
Group 9 - Silicates
ⓘTephroite9.AC.05Mn2+2(SiO4)
ⓘSpessartine9.AD.25Mn2+3Al2(SiO4)3
ⓘAlleghanyite9.AF.45Mn2+5(SiO4)2(OH)2
ⓘZoltaiite9.AG.85BaV4+2V3+12(SiO4)2O19
ⓘVanadoakasakaite-(Ce) (TL)9.BG.05b(CaCe)(V3+AlMn2+)O[Si2O7][SiO4](OH)
ⓘAkasakaite-(Ce) (TL)9.BG.05b(CaCe)(AlAlMn2+)O[Si2O7][SiO4](OH)
ⓘAkasakaite-(La) (TL)9.BG.05b(CaLa)(AlAlMn2+)O[Si2O7][SiO4](OH)
ⓘVanadoakasakaite-(La) (TL)9.BG.05b(CaLa)(V3+AlMn2+)O[Si2O7][SiO4](OH)
ⓘNagashimalite (TL)9.CE.20Ba4(V,Ti)4B2Si8O27(O,OH)2Cl
ⓘSuzukiite (TL)9.DH.15BaVSi2O7
ⓘRhodonite9.DK.05CaMn3Mn[Si5O15]
ⓘRoscoelite9.EC.15KV3+2(AlSi3O10)(OH)2
ⓘCymrite9.EG.05BaAl2Si2(O,OH)8 · H2O
ⓘHelvine9.FB.10Be3Mn2+4(SiO4)3S
Unclassified
ⓘ'Manganese Oxides'-
ⓘVanadoandrosite-(La) (TL)-Mn2+La(V3+AlMn2+)(Si2O7)(SiO4)O(OH)

List of minerals for each chemical element

HHydrogen
Hⓘ AlleghanyiteMn52+(SiO4)2(OH)2
Hⓘ CymriteBaAl2Si2(O,OH)8 · H2O
Hⓘ NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2Cl
Hⓘ PyrochroiteMn(OH)2
Hⓘ RoscoeliteKV23+(AlSi3O10)(OH)2
Hⓘ Wiserite(Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4Cl
Hⓘ Vanadoakasakaite-(Ce)(CaCe)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Hⓘ Akasakaite-(Ce)(CaCe)(AlAlMn2+)O[Si2O7][SiO4](OH)
Hⓘ Akasakaite-(La)(CaLa)(AlAlMn2+)O[Si2O7][SiO4](OH)
Hⓘ Vanadoakasakaite-(La)(CaLa)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Hⓘ Vanadoandrosite-(La)Mn2+La(V3+AlMn2+)(Si2O7)(SiO4)O(OH)
BeBeryllium
Beⓘ HelvineBe3Mn42+(SiO4)3S
BBoron
Bⓘ NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2Cl
Bⓘ Wiserite(Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4Cl
CCarbon
Cⓘ CalciteCaCO3
Cⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Cⓘ RhodochrositeMnCO3
OOxygen
Oⓘ AlleghanyiteMn52+(SiO4)2(OH)2
Oⓘ BaryteBaSO4
Oⓘ CalciteCaCO3
Oⓘ CymriteBaAl2Si2(O,OH)8 · H2O
Oⓘ HausmanniteMn2+Mn23+O4
Oⓘ HelvineBe3Mn42+(SiO4)3S
Oⓘ JacobsiteMn2+Fe23+O4
Oⓘ ManganositeMnO
Oⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Oⓘ MannarditeBa(Ti64+V23+)O16
Oⓘ NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2Cl
Oⓘ PyrochroiteMn(OH)2
Oⓘ QuartzSiO2
Oⓘ RhodochrositeMnCO3
Oⓘ RhodoniteCaMn3Mn[Si5O15]
Oⓘ RoscoeliteKV23+(AlSi3O10)(OH)2
Oⓘ SpessartineMn32+Al2(SiO4)3
Oⓘ SuzukiiteBaVSi2O7
Oⓘ TephroiteMn22+(SiO4)
Oⓘ Wiserite(Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4Cl
Oⓘ ZoltaiiteBaV24+V123+(SiO4)2O19
Oⓘ Vanadoakasakaite-(Ce)(CaCe)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Oⓘ Akasakaite-(Ce)(CaCe)(AlAlMn2+)O[Si2O7][SiO4](OH)
Oⓘ Akasakaite-(La)(CaLa)(AlAlMn2+)O[Si2O7][SiO4](OH)
Oⓘ Vanadoakasakaite-(La)(CaLa)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Oⓘ Vanadoandrosite-(La)Mn2+La(V3+AlMn2+)(Si2O7)(SiO4)O(OH)
MgMagnesium
Mgⓘ Wiserite(Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4Cl
AlAluminium
Alⓘ CymriteBaAl2Si2(O,OH)8 · H2O
Alⓘ RoscoeliteKV23+(AlSi3O10)(OH)2
Alⓘ SpessartineMn32+Al2(SiO4)3
Alⓘ Vanadoakasakaite-(Ce)(CaCe)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Alⓘ Akasakaite-(Ce)(CaCe)(AlAlMn2+)O[Si2O7][SiO4](OH)
Alⓘ Akasakaite-(La)(CaLa)(AlAlMn2+)O[Si2O7][SiO4](OH)
Alⓘ Vanadoakasakaite-(La)(CaLa)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Alⓘ Vanadoandrosite-(La)Mn2+La(V3+AlMn2+)(Si2O7)(SiO4)O(OH)
SiSilicon
Siⓘ AlleghanyiteMn52+(SiO4)2(OH)2
Siⓘ CymriteBaAl2Si2(O,OH)8 · H2O
Siⓘ HelvineBe3Mn42+(SiO4)3S
Siⓘ NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2Cl
Siⓘ QuartzSiO2
Siⓘ RhodoniteCaMn3Mn[Si5O15]
Siⓘ RoscoeliteKV23+(AlSi3O10)(OH)2
Siⓘ SpessartineMn32+Al2(SiO4)3
Siⓘ SuzukiiteBaVSi2O7
Siⓘ TephroiteMn22+(SiO4)
Siⓘ Wiserite(Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4Cl
Siⓘ ZoltaiiteBaV24+V123+(SiO4)2O19
Siⓘ Vanadoakasakaite-(Ce)(CaCe)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Siⓘ Akasakaite-(Ce)(CaCe)(AlAlMn2+)O[Si2O7][SiO4](OH)
Siⓘ Akasakaite-(La)(CaLa)(AlAlMn2+)O[Si2O7][SiO4](OH)
Siⓘ Vanadoakasakaite-(La)(CaLa)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Siⓘ Vanadoandrosite-(La)Mn2+La(V3+AlMn2+)(Si2O7)(SiO4)O(OH)
SSulfur
Sⓘ AlabanditeMnS
Sⓘ BaryteBaSO4
Sⓘ BorniteCu5FeS4
Sⓘ DigeniteCu9S5
Sⓘ GersdorffiteNiAsS
Sⓘ HelvineBe3Mn42+(SiO4)3S
Sⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
ClChlorine
Clⓘ NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2Cl
Clⓘ Wiserite(Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4Cl
KPotassium
Kⓘ RoscoeliteKV23+(AlSi3O10)(OH)2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Caⓘ RhodoniteCaMn3Mn[Si5O15]
Caⓘ Vanadoakasakaite-(Ce)(CaCe)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Caⓘ Akasakaite-(Ce)(CaCe)(AlAlMn2+)O[Si2O7][SiO4](OH)
Caⓘ Akasakaite-(La)(CaLa)(AlAlMn2+)O[Si2O7][SiO4](OH)
Caⓘ Vanadoakasakaite-(La)(CaLa)(V3+AlMn2+)O[Si2O7][SiO4](OH)
TiTitanium
Tiⓘ MannarditeBa(Ti64+V23+)O16
Tiⓘ NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2Cl
VVanadium
Vⓘ MannarditeBa(Ti64+V23+)O16
Vⓘ NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2Cl
Vⓘ RoscoeliteKV23+(AlSi3O10)(OH)2
Vⓘ SuzukiiteBaVSi2O7
Vⓘ ZoltaiiteBaV24+V123+(SiO4)2O19
Vⓘ Vanadoakasakaite-(Ce)(CaCe)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Vⓘ Vanadoakasakaite-(La)(CaLa)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Vⓘ Vanadoandrosite-(La)Mn2+La(V3+AlMn2+)(Si2O7)(SiO4)O(OH)
MnManganese
Mnⓘ AlabanditeMnS
Mnⓘ AlleghanyiteMn52+(SiO4)2(OH)2
Mnⓘ HausmanniteMn2+Mn23+O4
Mnⓘ HelvineBe3Mn42+(SiO4)3S
Mnⓘ JacobsiteMn2+Fe23+O4
Mnⓘ ManganositeMnO
Mnⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Mnⓘ PyrochroiteMn(OH)2
Mnⓘ RhodochrositeMnCO3
Mnⓘ RhodoniteCaMn3Mn[Si5O15]
Mnⓘ SpessartineMn32+Al2(SiO4)3
Mnⓘ TephroiteMn22+(SiO4)
Mnⓘ Wiserite(Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4Cl
Mnⓘ Vanadoakasakaite-(Ce)(CaCe)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Mnⓘ Akasakaite-(Ce)(CaCe)(AlAlMn2+)O[Si2O7][SiO4](OH)
Mnⓘ Akasakaite-(La)(CaLa)(AlAlMn2+)O[Si2O7][SiO4](OH)
Mnⓘ Vanadoakasakaite-(La)(CaLa)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Mnⓘ Vanadoandrosite-(La)Mn2+La(V3+AlMn2+)(Si2O7)(SiO4)O(OH)
FeIron
Feⓘ BorniteCu5FeS4
Feⓘ JacobsiteMn2+Fe23+O4
NiNickel
Niⓘ GersdorffiteNiAsS
CuCopper
Cuⓘ BorniteCu5FeS4
Cuⓘ DigeniteCu9S5
Cuⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
AsArsenic
Asⓘ GersdorffiteNiAsS
SbAntimony
Sbⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
BaBarium
Baⓘ BaryteBaSO4
Baⓘ CymriteBaAl2Si2(O,OH)8 · H2O
Baⓘ MannarditeBa(Ti64+V23+)O16
Baⓘ NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2Cl
Baⓘ SuzukiiteBaVSi2O7
Baⓘ ZoltaiiteBaV24+V123+(SiO4)2O19
LaLanthanum
Laⓘ Akasakaite-(La)(CaLa)(AlAlMn2+)O[Si2O7][SiO4](OH)
Laⓘ Vanadoakasakaite-(La)(CaLa)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Laⓘ Vanadoandrosite-(La)Mn2+La(V3+AlMn2+)(Si2O7)(SiO4)O(OH)
CeCerium
Ceⓘ Vanadoakasakaite-(Ce)(CaCe)(V3+AlMn2+)O[Si2O7][SiO4](OH)
Ceⓘ Akasakaite-(Ce)(CaCe)(AlAlMn2+)O[Si2O7][SiO4](OH)

Other Regions, Features and Areas containing this locality

AsiaContinent
Eurasian Plate
Japan
Okhotsk PlateTectonic Plate

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

Matsubara Satoshi, Kato, Akira (1980) Nagashimalite, Ba4(V3+,Ti)4[(O,OH)2|Cl|Si8B2O27], a new mineral from the Mogurazawa mine, gumma prefecture, Japan. Mineralogical Journal, 10 (3) 122-130 doi:10.2465/minerj.10.122
Matsubara, Satoshi, Kato, Akira, Yui, Shunzo (1982) Suzukiite, Ba2V4+2(O2|Si4O12), a new mineral from the Mogurazawa mine, Gumma Prefecture, Japan. Mineralogical Journal, 11 (1) 15-20 doi:10.2465/minerj.11.15
[1]Nagashima, Mariko; Nishio-Hamane, Daisuke; Ohnishi, Masayuki; Miyajima, Hiroshi; Harada, Akira (2026) New epidote-supergroup minerals from the Mogurazawa mine, Gunma, Japan: akasakaite-(Ce), akasakaite-(La), vanadoakasakaite-(Ce), and vanadoakasakaite-(La). Journal of Mineralogical and Petrological Sciences, 121 (1). 250927
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