Movatterモバイル変換

[0]ホーム
URL:

Log InRegister
AboutSupport UsPhotosDiscussionsSearchLearnMore
Quick Links :The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Ningyo-toge mine, Tottori Prefecture, Japani
Regional Level Types
Ningyo-toge mineMine
Tottori PrefecturePrefecture
JapanCountry

This page is currently not sponsored.Click here to sponsor this page.
PhotosMapsSearch
Standard
Specimen Photos (9)Photos by ColorGalleryPhoto StatisticsAdd Photo
Map PagesNearest LocalitiesUse Map in Article
Mineral SearchSimilar LocalitiesNearest LocalitiesPredictive MineralogySearch GoogleType Localities in Region
Latitude & Longitude (WGS84):
35° 18' 29'' North , 133° 55' 22'' East
Latitude & Longitude (decimal):
35.30833,133.92278
GRN:
N24E79
Type:
Mine
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Kurayoshi48,347(2017)16.9km
Tsuyama89,717(2017)29.3km
Tottori154,098(2017)35.3km
Niimi23,787(2017)55.0km
Mindat Locality ID:
13944
Long-form identifier:
mindat:1:2:13944:8
GUID (UUID V4):
0
Other/historical names associated with this locality:
Ningyo-tohge mine


Uranium deposit on the border between Tottori and Okayama prefectures, so some labels may give the locality as "Ningyo-toge Mine, Okayama Pref."

[The following is copied from the caption of photo #1435693 and was summarized from the Japanese-language Wikipedia article on Ningyo Pass,https://ja.wikipedia.org/wiki/%E4%BA%BA%E5%BD%A2%E5%B3%A0 .]

Ningyo Pass (Ningyo Toge) is a mountain pass located on the border of Misasa Town in Tottori Prefecture and Kagamino Town in Okayama Prefecture, with an altitude of 740.2 meters. Continuing upward it leads to the 1,003.81-meter peak of Mount Ningyo (Ningyo Sen).

In the 1950s, after the advent of nuclear power, Japan began exploring uranium deposits nationwide. Starting in the summer of 1954, various exploration teams converged in the Ningyo Pass area, discovering uranium deposits in multiple locations, with a total of more than ten deposits identified. Among them, the Ningyo Pass deposit had the highest uranium grade, reaching 0.06%. The uranium resources in this area were collectively termed the Ningyo Toge Mine. In August 1956, mining officially commenced, and activity flourished.

The mine’s peak period occurred in the 1970s when global uranium prices soared due to the oil crisis. However, the 1979 Three Mile Island nuclear accident in the U.S. raised awareness of the dangers of nuclear power, causing uranium prices to plummet to half their peak value. For economic reasons, mining at Ningyo Pass ceased, and by 2001, all associated smelting facilities were shut down. Starting January 20, 2021, a 20-year dismantling and decommissioning project began.

After returning former exploration lands to local residents following the mine's closure in the 1980s, it was discovered in 1988 that 450,000 cubic meters of soil mixed with ore had been dumped in open air in Tottori Prefecture, with radon gas levels exceeding safe limits by 10,000 times. The Ningyo Pass site, spanning two prefectures, led to disputes and blame-shifting between the local governments, resulting in nearly 20 years of litigation. Finally, in 2006, processed soil meeting safety standards began being sold to the public as paving tiles—a practice that continues to this day.

Select Mineral List Type

StandardDetailedGalleryStrunzChemical Elements

Detailed Mineral List:

ⓘ'Apatite'
Formula:Ca5(PO4)3(Cl/F/OH)
ⓘAutunite
Formula:Ca(UO2)2(PO4)2 · 10-12H2O
ⓘ'Biotite'
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘBoltwoodite
Formula:(K,Na)(UO2)(SiO3OH) · 1.5H2O
ⓘCalcite
Formula:CaCO3
ⓘCarnotite
Formula:K2(UO2)2(VO4)2 · 3H2O
ⓘ'Chlorite Group'
ⓘCoffinite
Formula:U(SiO4) · nH2O
ⓘ'Feldspar Group'
ⓘFerrihydrite
Formula:Fe3+10O14(OH)2
ⓘGoethite
Formula:Fe3+O(OH)
ⓘGypsum
Formula:CaSO4 · 2H2O
ⓘHaiweeite
Formula:Ca(UO2)2[Si5O12(OH)2] · 6H2O
ⓘ'Hypersthene'
Formula:(Mg,Fe)SiO3
ⓘKaolinite
Formula:Al2(Si2O5)(OH)4
ⓘLiebigite
Formula:Ca2(UO2)(CO3)3 · 11H2O
ⓘMarcasite
Formula:FeS2
ⓘMontmorillonite
Formula:(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
ⓘNingyoite (TL)
Formula:(U,Ca,Ce)2(PO4)2 · 1-2H2O
Type Locality:
Description: coating pyrite
ⓘParauranophane
Formula:Ca(UO2)2(SiO3OH)2 · 5H2O
ⓘPhosphuranylite
Formula:KCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
ⓘPyrite
Formula:FeS2
ⓘQuartz
Formula:SiO2
ⓘRutile
Formula:TiO2
ⓘSabugalite
Formula:HAl(UO2)4(PO4)4 · 16H2O
ⓘSchwertmannite
Formula:Fe3+16(OH,SO4)12-13O16 · 10-12H2O
ⓘSphalerite
Formula:ZnS
ⓘTorbernite
Formula:Cu(UO2)2(PO4)2 · 12H2O
ⓘUraninite
Formula:UO2
ⓘUranophane
Formula:Ca(UO2)2(SiO3OH)2 · 5H2O
ⓘUranopilite
Formula:(UO2)6(SO4)O2(OH)6 · 14H2O
ⓘWeeksite
Formula:K2(UO2)2(Si5O13) · 4H2O
ⓘZippeite
Formula:K3(UO2)4(SO4)2O3(OH) · 3H2O

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘQuartz4.DA.05SiO2
ⓘRutile4.DB.05TiO2
ⓘUraninite4.DL.05UO2
ⓘFerrihydrite4.FE.35Fe3+10O14(OH)2
ⓘCarnotite4.HB.05K2(UO2)2(VO4)2 · 3H2O
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘLiebigite5.ED.20Ca2(UO2)(CO3)3 · 11H2O
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘGypsum7.CD.40CaSO4 · 2H2O
ⓘSchwertmannite7.DE.15Fe3+16(OH,SO4)12-13O16 · 10-12H2O
ⓘUranopilite7.EA.05(UO2)6(SO4)O2(OH)6 · 14H2O
ⓘZippeite7.EC.05K3(UO2)4(SO4)2O3(OH) · 3H2O
Group 8 - Phosphates, Arsenates and Vanadates
ⓘNingyoite (TL)8.CJ.85(U,Ca,Ce)2(PO4)2 · 1-2H2O
ⓘAutunite8.EB.05Ca(UO2)2(PO4)2 · 10-12H2O
ⓘTorbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
ⓘSabugalite8.EB.55HAl(UO2)4(PO4)4 · 16H2O
ⓘPhosphuranylite8.EC.10KCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
Group 9 - Silicates
ⓘCoffinite9.AD.30U(SiO4) · nH2O
ⓘBoltwoodite9.AK.15(K,Na)(UO2)(SiO3OH) · 1.5H2O
ⓘParauranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
ⓘUranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
ⓘHaiweeite9.AK.25Ca(UO2)2[Si5O12(OH)2] · 6H2O
ⓘWeeksite9.AK.30K2(UO2)2(Si5O13) · 4H2O
ⓘMontmorillonite9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
ⓘKaolinite9.ED.05Al2(Si2O5)(OH)4
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Chlorite Group'-
ⓘ'Feldspar Group'-
ⓘ'Hypersthene'-(Mg,Fe)SiO3
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
HⓘAutuniteCa(UO2)2(PO4)2 · 10-12H2O
HⓘBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
HⓘBoltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
HⓘCarnotiteK2(UO2)2(VO4)2 · 3H2O
HⓘCoffiniteU(SiO4) · nH2O
HⓘFerrihydriteFe103+O14(OH)2
HⓘGoethiteFe3+O(OH)
HⓘGypsumCaSO4 · 2H2O
HⓘHaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2O
HⓘKaoliniteAl2(Si2O5)(OH)4
HⓘLiebigiteCa2(UO2)(CO3)3 · 11H2O
HⓘMontmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
HⓘNingyoite(U,Ca,Ce)2(PO4)2 · 1-2H2O
HⓘPhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
HⓘSabugaliteHAl(UO2)4(PO4)4 · 16H2O
HⓘTorberniteCu(UO2)2(PO4)2 · 12H2O
HⓘParauranophaneCa(UO2)2(SiO3OH)2 · 5H2O
HⓘUranophaneCa(UO2)2(SiO3OH)2 · 5H2O
HⓘUranopilite(UO2)6(SO4)O2(OH)6 · 14H2O
HⓘWeeksiteK2(UO2)2(Si5O13) · 4H2O
HⓘZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
HⓘSchwertmanniteFe163+(OH,SO4)12-13O16 · 10-12H2O
HⓘApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
CⓘCalciteCaCO3
CⓘLiebigiteCa2(UO2)(CO3)3 · 11H2O
OOxygen
OⓘAutuniteCa(UO2)2(PO4)2 · 10-12H2O
OⓘBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
OⓘBoltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
OⓘCalciteCaCO3
OⓘCarnotiteK2(UO2)2(VO4)2 · 3H2O
OⓘCoffiniteU(SiO4) · nH2O
OⓘFerrihydriteFe103+O14(OH)2
OⓘGoethiteFe3+O(OH)
OⓘGypsumCaSO4 · 2H2O
OⓘHaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2O
OⓘHypersthene(Mg,Fe)SiO3
OⓘKaoliniteAl2(Si2O5)(OH)4
OⓘLiebigiteCa2(UO2)(CO3)3 · 11H2O
OⓘMontmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
OⓘNingyoite(U,Ca,Ce)2(PO4)2 · 1-2H2O
OⓘPhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
OⓘQuartzSiO2
OⓘRutileTiO2
OⓘSabugaliteHAl(UO2)4(PO4)4 · 16H2O
OⓘTorberniteCu(UO2)2(PO4)2 · 12H2O
OⓘUraniniteUO2
OⓘParauranophaneCa(UO2)2(SiO3OH)2 · 5H2O
OⓘUranophaneCa(UO2)2(SiO3OH)2 · 5H2O
OⓘUranopilite(UO2)6(SO4)O2(OH)6 · 14H2O
OⓘWeeksiteK2(UO2)2(Si5O13) · 4H2O
OⓘZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
OⓘSchwertmanniteFe163+(OH,SO4)12-13O16 · 10-12H2O
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ⓘBoltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
NaⓘMontmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
MgMagnesium
MgⓘBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
MgⓘHypersthene(Mg,Fe)SiO3
MgⓘMontmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
AlAluminium
AlⓘBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlⓘKaoliniteAl2(Si2O5)(OH)4
AlⓘMontmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
AlⓘSabugaliteHAl(UO2)4(PO4)4 · 16H2O
SiSilicon
SiⓘBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
SiⓘBoltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
SiⓘCoffiniteU(SiO4) · nH2O
SiⓘHaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2O
SiⓘHypersthene(Mg,Fe)SiO3
SiⓘKaoliniteAl2(Si2O5)(OH)4
SiⓘMontmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
SiⓘQuartzSiO2
SiⓘParauranophaneCa(UO2)2(SiO3OH)2 · 5H2O
SiⓘUranophaneCa(UO2)2(SiO3OH)2 · 5H2O
SiⓘWeeksiteK2(UO2)2(Si5O13) · 4H2O
PPhosphorus
PⓘAutuniteCa(UO2)2(PO4)2 · 10-12H2O
PⓘNingyoite(U,Ca,Ce)2(PO4)2 · 1-2H2O
PⓘPhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
PⓘSabugaliteHAl(UO2)4(PO4)4 · 16H2O
PⓘTorberniteCu(UO2)2(PO4)2 · 12H2O
PⓘApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
SⓘGypsumCaSO4 · 2H2O
SⓘMarcasiteFeS2
SⓘPyriteFeS2
SⓘSphaleriteZnS
SⓘUranopilite(UO2)6(SO4)O2(OH)6 · 14H2O
SⓘZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
SⓘSchwertmanniteFe163+(OH,SO4)12-13O16 · 10-12H2O
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ⓘBoltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
KⓘCarnotiteK2(UO2)2(VO4)2 · 3H2O
KⓘPhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
KⓘWeeksiteK2(UO2)2(Si5O13) · 4H2O
KⓘZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
CaCalcium
CaⓘAutuniteCa(UO2)2(PO4)2 · 10-12H2O
CaⓘCalciteCaCO3
CaⓘGypsumCaSO4 · 2H2O
CaⓘHaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2O
CaⓘLiebigiteCa2(UO2)(CO3)3 · 11H2O
CaⓘMontmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
CaⓘNingyoite(U,Ca,Ce)2(PO4)2 · 1-2H2O
CaⓘPhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
CaⓘParauranophaneCa(UO2)2(SiO3OH)2 · 5H2O
CaⓘUranophaneCa(UO2)2(SiO3OH)2 · 5H2O
CaⓘApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
TiⓘBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
TiⓘRutileTiO2
VVanadium
VⓘCarnotiteK2(UO2)2(VO4)2 · 3H2O
FeIron
FeⓘBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeⓘFerrihydriteFe103+O14(OH)2
FeⓘGoethiteFe3+O(OH)
FeⓘHypersthene(Mg,Fe)SiO3
FeⓘMarcasiteFeS2
FeⓘPyriteFeS2
FeⓘSchwertmanniteFe163+(OH,SO4)12-13O16 · 10-12H2O
CuCopper
CuⓘTorberniteCu(UO2)2(PO4)2 · 12H2O
ZnZinc
ZnⓘSphaleriteZnS
CeCerium
CeⓘNingyoite(U,Ca,Ce)2(PO4)2 · 1-2H2O
UUranium
UⓘAutuniteCa(UO2)2(PO4)2 · 10-12H2O
UⓘBoltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
UⓘCarnotiteK2(UO2)2(VO4)2 · 3H2O
UⓘCoffiniteU(SiO4) · nH2O
UⓘHaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2O
UⓘLiebigiteCa2(UO2)(CO3)3 · 11H2O
UⓘNingyoite(U,Ca,Ce)2(PO4)2 · 1-2H2O
UⓘPhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
UⓘSabugaliteHAl(UO2)4(PO4)4 · 16H2O
UⓘTorberniteCu(UO2)2(PO4)2 · 12H2O
UⓘUraniniteUO2
UⓘParauranophaneCa(UO2)2(SiO3OH)2 · 5H2O
UⓘUranophaneCa(UO2)2(SiO3OH)2 · 5H2O
UⓘUranopilite(UO2)6(SO4)O2(OH)6 · 14H2O
UⓘWeeksiteK2(UO2)2(Si5O13) · 4H2O
UⓘZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O

Other Regions, Features and Areas containing this locality

Amur PlateTectonic Plate
AsiaContinent
Eurasian Plate
Japan

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, pleaseregister so you can add to our database. This locality information is for reference purposes only. You should never attempt tovisit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holdersfor access and that you are aware of all safety precautions necessary.

References

Muto, T., Meyrowitz, R., Pommer, A. M., Murano, T. (1959) Ningyoite, a new uranous phosphate from Japan.American Mineralogist, 44 (5-6) 633-650
Muto, T. (1962). The Precititation Environment of Ningyoite. Mineralogical Journal, 3(5-6), 306-337.
Murano, T. (1963). Radioactive Equilibrium in the Ningyotoge Uranium Ores, Especially Between Ionium and Uranium. Mineralogical Journal, 4(1), 12-29.
Kamitani, M., Okumura, K., Teraoka, Y., Miyano, S., Watanabe, Y. (2007)Mineral Resources Map of East Asia, Geological Survey of Japan.
Kato, T.; Kawasaki, Y.; Kadokura, M.; Suzuki, K.; Tawara, Y.; Ohara, Y.; Tokoro, C. (2020) Application of GETFLOWS Coupled with Chemical Reactions to Arsenic Removal through Ferrihydrite Coprecipitation in an Artificial Wetland of a Japanese Closed Mine. Minerals 10, 475.
Quick NavTopCommoditiesMineral ListOther RegionsReferences
 
and/or 
Mindat.org is an outreach project of theHudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2025, except where stated. Most political location boundaries are© OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 byJolyon Ralph.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844.doi:10.2138/am-2024-9486.
Privacy Policy -Terms & Conditions -Contact Us / DMCA issues -Report a bug/vulnerabilityCurrent server date and time: November 27, 2025 21:33:49 Page updated: November 14, 2025 21:26:11