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Nebazawa mine, Katashina, Tone District, Gunma Prefecture, Japani
Regional Level Types
Nebazawa mineMine
KatashinaVillage
Tone DistrictDistrict
Gunma PrefecturePrefecture
JapanCountry

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Latitude & Longitude (WGS84):
36° 52' 14'' North , 139° 19' 19'' East
Latitude & Longitude (decimal):
36.87083,139.32222
GRN:
N25E80
Type:
Mine
Kรถppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Nikkล16,041 (2017)29.4km
Numata45,526 (2017)35.8km
Imaichi64,323 (2018)36.4km
Muikamachi29,123 (2017)44.6km
Shiozawa20,178 (2017)46.0km
Mindat Locality ID:
121153
Long-form identifier:
mindat:1:2:121153:8
GUID (UUID V4):
0


A gold and silver mine, started in 1961 and closed in 1982.

The ore deposit of this mine is of a Neogene epithermal vein type, and consists of gold- and silver-bearing quartz-adularia-calcite veins. Eastern half area of this district is underlain by three thick formations of acidic pyroclastics consisting mainly of rhyolitic welded tuff. The Manzai No. 2 and No. 3 veins and the Hon-pi vein are the major veins in this mine. The Au-Ag mineralizations in these veins are typically of so-called ginguro-type, which is characterized by black-colored bands consisting of very fine-grained Au-Ag minerals and some other ore minerals.

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


17 valid minerals.

Rock Types Recorded


Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

โ“˜ Acanthite
Formula: Ag2S
โ“˜ Arsenopyrite
Formula: FeAsS
โ“˜ Calcite
Formula: CaCO3
โ“˜ Chalcopyrite
Formula: CuFeS2
โ“˜ Covellite
Formula: CuS
โ“˜ 'Freibergite Subgroup'
Formula: (Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1
โ“˜ Galena
Formula: PbS
โ“˜ 'K Feldspar'
โ“˜ 'K Feldspar var. Adularia'
Formula: KAlSi3O8
โ“˜ Marcasite
Formula: FeS2
โ“˜ Miargyrite
Formula: AgSbS2
โ“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
โ“˜ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
โ“˜ Native Gold
Formula: Au
โ“˜ Native Gold var. Electrum
Formula: (Au,Ag)
โ“˜ Native Silver
Formula: Ag
โ“˜ 'Pearceite-T2ac'
Formula: [Ag6As2S7][Ag9CuS4]
โ“˜ Polybasite
Formula: [Ag6Sb2S7][Ag9CuS4]
โ“˜ Proustite
Formula: Ag3AsS3
โ“˜ Pyrargyrite
Formula: Ag3SbS3
โ“˜ Pyrite
Formula: FeS2
โ“˜ Quartz
Formula: SiO2
โ“˜ Sphalerite
Formula: ZnS
โ“˜ 'Tetrahedrite Subgroup'
Formula: Cu6(Cu4C2+2)Sb4S12S

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
โ“˜Native Gold
var. Electrum		1.AA.05(Au,Ag)
โ“˜1.AA.05Au
โ“˜Native Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
โ“˜Acanthite2.BA.35Ag2S
โ“˜Covellite2.CA.05aCuS
โ“˜Sphalerite2.CB.05aZnS
โ“˜Chalcopyrite2.CB.10aCuFeS2
โ“˜Galena2.CD.10PbS
โ“˜Pyrite2.EB.05aFeS2
โ“˜Marcasite2.EB.10aFeS2
โ“˜Arsenopyrite2.EB.20FeAsS
โ“˜Proustite2.GA.05Ag3AsS3
โ“˜Pyrargyrite2.GA.05Ag3SbS3
โ“˜'Freibergite Subgroup'2.GB.05(Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1
โ“˜'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
โ“˜Polybasite2.GB.15[Ag6Sb2S7][Ag9CuS4]
โ“˜Miargyrite2.HA.10AgSbS2
Group 4 - Oxides and Hydroxides
โ“˜Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
โ“˜Calcite5.AB.05CaCO3
Group 9 - Silicates
โ“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
โ“˜var. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
โ“˜'K Feldspar
var. Adularia'		-KAlSi3O8
โ“˜'Pearceite-T2ac'-[Ag6As2S7][Ag9CuS4]
โ“˜'K Feldspar'-

List of minerals for each chemical element

HHydrogen
Hโ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hโ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CCarbon
Cโ“˜ CalciteCaCO3
OOxygen
Oโ“˜ K Feldspar var. AdulariaKAlSi3O8
Oโ“˜ CalciteCaCO3
Oโ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oโ“˜ QuartzSiO2
Oโ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
AlAluminium
Alโ“˜ K Feldspar var. AdulariaKAlSi3O8
Alโ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alโ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siโ“˜ K Feldspar var. AdulariaKAlSi3O8
Siโ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siโ“˜ QuartzSiO2
Siโ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SSulfur
Sโ“˜ AcanthiteAg2S
Sโ“˜ ArsenopyriteFeAsS
Sโ“˜ Pearceite-T2ac[Ag6As2S7][Ag9CuS4]
Sโ“˜ ChalcopyriteCuFeS2
Sโ“˜ CovelliteCuS
Sโ“˜ Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1
Sโ“˜ GalenaPbS
Sโ“˜ MarcasiteFeS2
Sโ“˜ MiargyriteAgSbS2
Sโ“˜ Polybasite[Ag6Sb2S7][Ag9CuS4]
Sโ“˜ ProustiteAg3AsS3
Sโ“˜ PyrargyriteAg3SbS3
Sโ“˜ PyriteFeS2
Sโ“˜ SphaleriteZnS
Sโ“˜ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
KPotassium
Kโ“˜ K Feldspar var. AdulariaKAlSi3O8
Kโ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Kโ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caโ“˜ CalciteCaCO3
FeIron
Feโ“˜ ArsenopyriteFeAsS
Feโ“˜ ChalcopyriteCuFeS2
Feโ“˜ MarcasiteFeS2
Feโ“˜ PyriteFeS2
CuCopper
Cuโ“˜ Pearceite-T2ac[Ag6As2S7][Ag9CuS4]
Cuโ“˜ ChalcopyriteCuFeS2
Cuโ“˜ CovelliteCuS
Cuโ“˜ Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1
Cuโ“˜ Polybasite[Ag6Sb2S7][Ag9CuS4]
Cuโ“˜ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
ZnZinc
Znโ“˜ SphaleriteZnS
AsArsenic
Asโ“˜ ArsenopyriteFeAsS
Asโ“˜ Pearceite-T2ac[Ag6As2S7][Ag9CuS4]
Asโ“˜ ProustiteAg3AsS3
AgSilver
Agโ“˜ AcanthiteAg2S
Agโ“˜ Pearceite-T2ac[Ag6As2S7][Ag9CuS4]
Agโ“˜ Native Gold var. Electrum(Au,Ag)
Agโ“˜ Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1
Agโ“˜ MiargyriteAgSbS2
Agโ“˜ Polybasite[Ag6Sb2S7][Ag9CuS4]
Agโ“˜ ProustiteAg3AsS3
Agโ“˜ PyrargyriteAg3SbS3
Agโ“˜ Native SilverAg
SbAntimony
Sbโ“˜ Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1
Sbโ“˜ MiargyriteAgSbS2
Sbโ“˜ Polybasite[Ag6Sb2S7][Ag9CuS4]
Sbโ“˜ PyrargyriteAg3SbS3
Sbโ“˜ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
AuGold
Auโ“˜ Native Gold var. Electrum(Au,Ag)
Auโ“˜ Native GoldAu
PbLead
Pbโ“˜ GalenaPbS

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

Nakayama, E. (1986): Chemical composition of sphalerite from the Nebazawa gold-silver mine, Gunma Prefecture, and its bearing on the evolution of ore fluid. Kozan Chishitsu 36, 523-533
[1]NAKAYAMA, Eiji (1986) Paragenetic and compositional variations of Au-Ag minerals in the ginguro ores from the Nebazawa mine, Gunma Prefecture. Mining Geology, 36 (200). 511-522
Kamitani, M., Okumura, K., Teraoka, Y., Miyano, S., Watanabe, Y. (2007) Mineral Resources Map of East Asia, Geological Survey of Japan.
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