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Kyurasawa mine, Ashio, Nikko City, Tochigi Prefecture, Japani
Regional Level Types
Kyurasawa mineMine (Abandoned)
AshioTown (Former)
Nikko CityCity
Tochigi PrefecturePrefecture
JapanCountry

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PhotosMapsSearch
09228550017272089977678.jpg
Dump of Kyurasawa Mine

Kyurasawa mine, Ashio, Nikko City, Tochigi Prefecture, Japan
02198470017272089985940.jpg
Mining tunnels in Kyurasawa Mine

Kyurasawa mine, Ashio, Nikko City, Tochigi Prefecture, Japan
07136110017272089982790.jpg
Entrance of mining tunnel

Kyurasawa mine, Ashio, Nikko City, Tochigi Prefecture, Japan
09228550017272089977678.jpg
Dump of Kyurasawa Mine

Kyurasawa mine, Ashio, Nikko City, Tochigi Prefecture, Japan
02198470017272089985940.jpg
Mining tunnels in Kyurasawa Mine

Kyurasawa mine, Ashio, Nikko City, Tochigi Prefecture, Japan
07136110017272089982790.jpg
Entrance of mining tunnel

Kyurasawa mine, Ashio, Nikko City, Tochigi Prefecture, Japan
09228550017272089977678.jpg
Dump of Kyurasawa Mine

Kyurasawa mine, Ashio, Nikko City, Tochigi Prefecture, Japan
03594550017272089998838.jpg
Mining tunnels in Kyurasawa Mine

Kyurasawa mine, Ashio, Nikko City, Tochigi Prefecture, Japan
Latitude & Longitude (WGS84):
36° 45' 16'' North , 139° 42' 9'' East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~0km
GRN:
N25E81
Type:
Mine (Abandoned) - last checked 2024
Age:
541 ± 1.0 to 252.17 ± 0.06 Ma
Geologic Time:
Paleozoic
Köppen climate type:
Cfa : Humid subtropical climate
Mindat Locality ID:
68795
Long-form identifier:
mindat:1:2:68795:4
GUID (UUID V4):
0
Other/historical names associated with this locality:
Kyuurasawa; Kyurazawa


Chert-hosted metasedimentary Paleozoic manganese ore, contact metamorphosed by granitic intrusion. Mining started in 1956; now closed. Main ore minerals were pyrosmalite-(Mn), rhodonite, manganogrunerite, spessartine and manganoan fayalite.

Note on the mineral list: "Pyrosmalite" recorded from here is Fe-rich manganpyrosmalite. Contributors, please do not add "pyrosmalite" to this species list.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

21 valid minerals. 1 erroneous literature entry.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Alabandite
Formula: MnS
ⓘ Allanite-(Ce)
Formula: (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
ⓘ Arsenopyrite
Formula: FeAsS
ⓘ Calcite
Formula: CaCO3
ⓘ Calcite var. Manganese-bearing Calcite
Formula: (Ca,Mn)CO3
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ Clino-ferro-suenoite
Formula: ◻{Mn2+2}{Fe2+5}(Si8O22)(OH)2
ⓘ 'Fayalite-Tephroite Series'
ⓘ 'Fayalite-Tephroite Series var. Knebelite'
Formula: from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
ⓘ Galena
Formula: PbS
ⓘ Manganite
Formula: Mn3+O(OH)
ⓘ Manganosite
Formula: MnO
ⓘ Mcgillite
Formula: (Mn,Fe)8Si6O15(OH)8Cl2
ⓘ Nickeline
Formula: NiAs
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrosmalite-(Fe)
Formula: Fe2+8Si6O15(OH,Cl)10
ⓘ Pyrosmalite-(Mn)
Formula: Mn2+8Si6O15(OH,Cl)10
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
ⓘ Quartz var. Chalcedony ?
Formula: SiO2
ⓘ Rhodochrosite
Formula: MnCO3
ⓘ Rhodonite
Formula: CaMn3Mn[Si5O15]
ⓘ Spessartine
Formula: Mn2+3Al2(SiO4)3
ⓘ Spessartine var. Vanadium-bearing Spessartine
Formula: Mn2+3Al2(SiO4)3
ⓘ Sphalerite
Formula: ZnS
ⓘ Tephroite
Formula: Mn2+2SiO4
ⓘ Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2
References:
(specimen labels)
ⓘ 'UM1994-25-SiO:AlCaFeHREEV'
Formula: (CaREE)(V3+AlFe2+)O[Si2O7][SiO4](OH)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘNickeline2.CC.05NiAs
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘAlabandite2.CD.10MnS
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
ⓘArsenopyrite2.EB.20FeAsS
Group 4 - Oxides and Hydroxides
ⓘManganosite4.AB.25MnO
ⓘQuartz
var. Chalcedony ?		4.DA.05SiO2
ⓘ4.DA.05SiO2
ⓘManganite4.FD.15Mn3+O(OH)
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘvar. Manganese-bearing Calcite5.AB.05(Ca,Mn)CO3
ⓘRhodochrosite5.AB.05MnCO3
Group 9 - Silicates
ⓘTephroite9.AC.05Mn2+2SiO4
ⓘSpessartine9.AD.25Mn2+3Al2(SiO4)3
ⓘvar. Vanadium-bearing Spessartine9.AD.25Mn2+3Al2(SiO4)3
ⓘAllanite-(Ce)9.BG.05b(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
ⓘTremolite9.DE.10◻Ca2Mg5(Si8O22)(OH)2
ⓘClino-ferro-suenoite9.DE.10◻{Mn2+2}{Fe2+5}(Si8O22)(OH)2
ⓘRhodonite9.DK.05CaMn3Mn[Si5O15]
ⓘPyrosmalite-(Fe) ?9.EE.10Fe2+8Si6O15(OH,Cl)10
ⓘPyrosmalite-(Mn)9.EE.10Mn2+8Si6O15(OH,Cl)10
ⓘMcgillite9.EE.10(Mn,Fe)8Si6O15(OH)8Cl2
Unclassified
ⓘ'Fayalite-Tephroite Series'-
ⓘ'var. Knebelite'-from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
ⓘ'UM1994-25-SiO:AlCaFeHREEV'-(CaREE)(V3+AlFe2+)O[Si2O7][SiO4](OH)

List of minerals for each chemical element

HHydrogen
Hⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Hⓘ Pyrosmalite-(Fe)Fe82+Si6O15(OH,Cl)10
Hⓘ Pyrosmalite-(Mn)Mn82+Si6O15(OH,Cl)10
Hⓘ ManganiteMn3+O(OH)
Hⓘ Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2
Hⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Hⓘ Clino-ferro-suenoite◻{Mn22+}{Fe52+}(Si8O22)(OH)2
Hⓘ UM1994-25-SiO:AlCaFeHREEV(CaREE)(V3+AlFe2+)O[Si2O7][SiO4](OH)
CCarbon
Cⓘ CalciteCaCO3
Cⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Cⓘ RhodochrositeMnCO3
OOxygen
Oⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Oⓘ CalciteCaCO3
Oⓘ Quartz var. ChalcedonySiO2
Oⓘ Pyrosmalite-(Fe)Fe82+Si6O15(OH,Cl)10
Oⓘ Pyrosmalite-(Mn)Mn82+Si6O15(OH,Cl)10
Oⓘ ManganositeMnO
Oⓘ ManganiteMn3+O(OH)
Oⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Oⓘ Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2
Oⓘ QuartzSiO2
Oⓘ RhodochrositeMnCO3
Oⓘ RhodoniteCaMn3Mn[Si5O15]
Oⓘ SpessartineMn32+Al2(SiO4)3
Oⓘ TephroiteMn22+SiO4
Oⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Oⓘ Fayalite-Tephroite Series
Oⓘ Fayalite-Tephroite Series var. Knebelitefrom (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
Oⓘ Clino-ferro-suenoite◻{Mn22+}{Fe52+}(Si8O22)(OH)2
Oⓘ UM1994-25-SiO:AlCaFeHREEV(CaREE)(V3+AlFe2+)O[Si2O7][SiO4](OH)
Oⓘ Spessartine var. Vanadium-bearing SpessartineMn32+Al2(SiO4)3
MgMagnesium
Mgⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
AlAluminium
Alⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Alⓘ SpessartineMn32+Al2(SiO4)3
Alⓘ UM1994-25-SiO:AlCaFeHREEV(CaREE)(V3+AlFe2+)O[Si2O7][SiO4](OH)
Alⓘ Spessartine var. Vanadium-bearing SpessartineMn32+Al2(SiO4)3
SiSilicon
Siⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Siⓘ Quartz var. ChalcedonySiO2
Siⓘ Pyrosmalite-(Fe)Fe82+Si6O15(OH,Cl)10
Siⓘ Pyrosmalite-(Mn)Mn82+Si6O15(OH,Cl)10
Siⓘ Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2
Siⓘ QuartzSiO2
Siⓘ RhodoniteCaMn3Mn[Si5O15]
Siⓘ SpessartineMn32+Al2(SiO4)3
Siⓘ TephroiteMn22+SiO4
Siⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Siⓘ Fayalite-Tephroite Series
Siⓘ Fayalite-Tephroite Series var. Knebelitefrom (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
Siⓘ Clino-ferro-suenoite◻{Mn22+}{Fe52+}(Si8O22)(OH)2
Siⓘ UM1994-25-SiO:AlCaFeHREEV(CaREE)(V3+AlFe2+)O[Si2O7][SiO4](OH)
Siⓘ Spessartine var. Vanadium-bearing SpessartineMn32+Al2(SiO4)3
SSulfur
Sⓘ AlabanditeMnS
Sⓘ ArsenopyriteFeAsS
Sⓘ ChalcopyriteCuFeS2
Sⓘ GalenaPbS
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
ClChlorine
Clⓘ Pyrosmalite-(Fe)Fe82+Si6O15(OH,Cl)10
Clⓘ Pyrosmalite-(Mn)Mn82+Si6O15(OH,Cl)10
Clⓘ Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2
CaCalcium
Caⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Caⓘ CalciteCaCO3
Caⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Caⓘ RhodoniteCaMn3Mn[Si5O15]
Caⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Caⓘ UM1994-25-SiO:AlCaFeHREEV(CaREE)(V3+AlFe2+)O[Si2O7][SiO4](OH)
VVanadium
Vⓘ UM1994-25-SiO:AlCaFeHREEV(CaREE)(V3+AlFe2+)O[Si2O7][SiO4](OH)
MnManganese
Mnⓘ AlabanditeMnS
Mnⓘ Pyrosmalite-(Mn)Mn82+Si6O15(OH,Cl)10
Mnⓘ ManganositeMnO
Mnⓘ ManganiteMn3+O(OH)
Mnⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Mnⓘ Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2
Mnⓘ RhodochrositeMnCO3
Mnⓘ RhodoniteCaMn3Mn[Si5O15]
Mnⓘ SpessartineMn32+Al2(SiO4)3
Mnⓘ TephroiteMn22+SiO4
Mnⓘ Fayalite-Tephroite Series
Mnⓘ Fayalite-Tephroite Series var. Knebelitefrom (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
Mnⓘ Clino-ferro-suenoite◻{Mn22+}{Fe52+}(Si8O22)(OH)2
Mnⓘ Spessartine var. Vanadium-bearing SpessartineMn32+Al2(SiO4)3
FeIron
Feⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Feⓘ ArsenopyriteFeAsS
Feⓘ ChalcopyriteCuFeS2
Feⓘ Pyrosmalite-(Fe)Fe82+Si6O15(OH,Cl)10
Feⓘ Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ Fayalite-Tephroite Series
Feⓘ Fayalite-Tephroite Series var. Knebelitefrom (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
Feⓘ Clino-ferro-suenoite◻{Mn22+}{Fe52+}(Si8O22)(OH)2
Feⓘ UM1994-25-SiO:AlCaFeHREEV(CaREE)(V3+AlFe2+)O[Si2O7][SiO4](OH)
NiNickel
Niⓘ NickelineNiAs
CuCopper
Cuⓘ ChalcopyriteCuFeS2
ZnZinc
Znⓘ SphaleriteZnS
AsArsenic
Asⓘ ArsenopyriteFeAsS
Asⓘ NickelineNiAs
CeCerium
Ceⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
PbLead
Pbⓘ GalenaPbS

Localities in this Region

Japan
  • Tochigi Prefecture

Other Regions, Features and Areas containing this locality

AsiaContinent
Eurasian Plate
Japan
Okhotsk PlateTectonic Plate

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