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Kokuriki mine, Kitami City, Okhotsk Subprefecture (Abashiri Province), Hokkaidō Prefecture, Japani
Regional Level Types
Kokuriki mineMine
Kitami CityCity
Okhotsk Subprefecture (Abashiri Province)Subprefecture
Hokkaidō PrefecturePrefecture
JapanCountry

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Key
Latitude & Longitude (WGS84):
43° 58' North , 143° 56' East
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Kitami113,137 (2017)18.5km
Motomachi22,972 (2017)20.3km
Abashiri42,498 (2018)27.6km


An iron and manganese mine, now closed, on the north coast of Hokkaido, near the shores of the Sea of Okhotsk. Ore deposit of Mesozoic age. Hematite was the main ore mineral, but also yielded several manganese minerals.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


19 valid minerals. 1 (TL) - type locality of valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and 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:

Baryte
Formula: BaSO4
Reference: Kenji Togari, Masahide Akasaka and Yoshiyuki Kawaguchi (1986) INESITE FROM THE KOKURIKI MINE, HOKKAIDO, JAPAN. Jour. Fac. Sci., Hokkaido Univ., Ser. IV, vol. 21, no. 4, Feb., 1986, pp. 669-677.; Togari, K., & Akasaka, M. (1987). Okhotskite, a new mineral, an Mn3+-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine, 51(62), 611-614.
Bementite
Formula: Mn7Si6O15(OH)8
Reference: Togari, K., & Akasaka, M. (1987). Okhotskite, a new mineral, an Mn3+-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine, 51(62), 611-614.
Calcite
Formula: CaCO3
Reference: Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.
Chalcopyrite
Formula: CuFeS2
Reference: Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.
'Chlorite Group'
Reference: Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Togari, K., & Akasaka, M. (1987). Okhotskite, a new mineral, an Mn3+-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine, 51(62), 611-614.
Hematite
Formula: Fe2O3
Reference: Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.; Kenji Togari, Masahide Akasaka and Yoshiyuki Kawaguchi (1986) INESITE FROM THE KOKURIKI MINE, HOKKAIDO, JAPAN. Jour. Fac. Sci., Hokkaido Univ., Ser. IV, vol. 21, no. 4, Feb., 1986, pp. 669-677.; Togari, K., & Akasaka, M. (1987). Okhotskite, a new mineral, an Mn3+-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine, 51(62), 611-614.
Inesite
Formula: Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Reference: Akira Kato (2011) Explanations of distributed specimens at the Ordinary Meeting of Mumeikai Group, No. 34 (January, 2011).; Kenji Togari, Masahide Akasaka and Yoshiyuki Kawaguchi (1986) INESITE FROM THE KOKURIKI MINE, HOKKAIDO, JAPAN. Jour. Fac. Sci., Hokkaido Univ., Ser. IV, vol. 21, no. 4, Feb., 1986, pp. 669-677.; Togari, K., & Akasaka, M. (1987). Okhotskite, a new mineral, an Mn3+-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine, 51(62), 611-614.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.
Neotocite
Formula: (Mn,Fe,Mg)SiO3 · H2O
Reference: Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.; Togari, K., & Akasaka, M. (1987). Okhotskite, a new mineral, an Mn3+-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine, 51(62), 611-614.
Okhotskite (TL)
Formula: Ca2Mn3+Mn3+2(Si2O7)(SiO4)(OH)2 · H2O
Type Locality:
Reference: Togari, K., & Akasaka, M. (1987). Okhotskite, a new mineral, an Mn3+-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine, 51(62), 611-614.
Opal ?
Formula: SiO2 · nH2O
Reference: Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.
Piemontite
Formula: {Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Reference: Togari, K., & Akasaka, M. (1987). Okhotskite, a new mineral, an Mn3+-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine, 51(62), 611-614.
Piemontite-(Sr)
Formula: {CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Reference: Akasaka et al (1988) Mineralogy and Petrology, 38, 105-116.; Kenji Togari, Masahide Akasaka and Yoshiyuki Kawaguchi (1986) INESITE FROM THE KOKURIKI MINE, HOKKAIDO, JAPAN. Jour. Fac. Sci., Hokkaido Univ., Ser. IV, vol. 21, no. 4, Feb., 1986, pp. 669-677.
'Psilomelane'
Formula: Mn, O
Reference: Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.
Pumpellyite-(Mn2+)
Formula: Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
Reference: Akira Kato (2011) Explanations of distributed specimens at the Ordinary Meeting of Mumeikai Group, No. 34 (January, 2011).; Kenji Togari, Masahide Akasaka and Yoshiyuki Kawaguchi (1986) INESITE FROM THE KOKURIKI MINE, HOKKAIDO, JAPAN. Jour. Fac. Sci., Hokkaido Univ., Ser. IV, vol. 21, no. 4, Feb., 1986, pp. 669-677.
Pyrite
Formula: FeS2
Reference: Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.
Pyrolusite
Formula: Mn4+O2
Reference: Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.
Quartz
Formula: SiO2
Reference: Kenji Togari, Masahide Akasaka and Yoshiyuki Kawaguchi (1986) INESITE FROM THE KOKURIKI MINE, HOKKAIDO, JAPAN. Jour. Fac. Sci., Hokkaido Univ., Ser. IV, vol. 21, no. 4, Feb., 1986, pp. 669-677.; Togari, K., & Akasaka, M. (1987). Okhotskite, a new mineral, an Mn3+-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine, 51(62), 611-614.
Quartz var: Chalcedony ?
Formula: SiO2
Reference: Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.
Rhodochrosite
Formula: MnCO3
Reference: Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.; Kenji Togari, Masahide Akasaka and Yoshiyuki Kawaguchi (1986) INESITE FROM THE KOKURIKI MINE, HOKKAIDO, JAPAN. Jour. Fac. Sci., Hokkaido Univ., Ser. IV, vol. 21, no. 4, Feb., 1986, pp. 669-677.; Togari, K., & Akasaka, M. (1987). Okhotskite, a new mineral, an Mn3+-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine, 51(62), 611-614.
Rhodonite
Formula: Mn2+SiO3
Reference: Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Opal ?4.DA.10SiO2 · nH2O
Pyrolusite4.DB.05Mn4+O2
Quartz4.DA.05SiO2
var: Chalcedony ?4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Rhodochrosite5.AB.05MnCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
Bementite9.EE.05Mn7Si6O15(OH)8
Inesite9.DL.05Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Neotocite9.ED.20(Mn,Fe,Mg)SiO3 · H2O
Okhotskite (TL)9.BG.20Ca2Mn3+Mn3+2(Si2O7)(SiO4)(OH)2 · H2O
Piemontite9.BG.05a{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Piemontite-(Sr)9.BG.05{CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Pumpellyite-(Mn2+)9.BG.20Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
Rhodonite9.DK.05Mn2+SiO3
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
'Psilomelane'-Mn, O

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Pyrolusite4.4.1.4Mn4+O2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Rhodochrosite14.1.1.4MnCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Piemontite58.2.1a.11{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Piemontite-(Sr)58.2.1a.12{CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Pumpellyite-(Mn2+)58.2.2.8Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=5
Rhodonite65.4.1.1Mn2+SiO3
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Ca-Na subgroup
Inesite66.3.3.1Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Neotocite71.1.5.4(Mn,Fe,Mg)SiO3 · H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal ?75.2.1.1SiO2 · nH2O
Group 78 - Unclassified Silicates
Bementite78.5.2.1Mn7Si6O15(OH)8
Unclassified Minerals, Mixtures, etc.
'Chlorite Group'-
Okhotskite (TL)-Ca2Mn3+Mn3+2(Si2O7)(SiO4)(OH)2 · H2O
'Psilomelane'-Mn, O
Quartz
var: Chalcedony ?
-SiO2

List of minerals for each chemical element

HHydrogen
H OkhotskiteCa2Mn3+Mn23+(Si2O7)(SiO4)(OH)2 · H2O
H Neotocite(Mn,Fe,Mg)SiO3 · H2O
H Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
H BementiteMn7Si6O15(OH)8
H Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
H InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
H Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
H OpalSiO2 · nH2O
CCarbon
C RhodochrositeMnCO3
C CalciteCaCO3
OOxygen
O OkhotskiteCa2Mn3+Mn23+(Si2O7)(SiO4)(OH)2 · H2O
O HematiteFe2O3
O PyrolusiteMn4+O2
O PsilomelaneMn, O
O RhodochrositeMnCO3
O MagnetiteFe2+Fe23+O4
O CalciteCaCO3
O Neotocite(Mn,Fe,Mg)SiO3 · H2O
O QuartzSiO2
O Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
O BementiteMn7Si6O15(OH)8
O FluorapatiteCa5(PO4)3F
O Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
O RhodoniteMn2+SiO3
O InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
O Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
O BaryteBaSO4
O OpalSiO2 · nH2O
O Quartz (var: Chalcedony)SiO2
FFluorine
F FluorapatiteCa5(PO4)3F
MgMagnesium
Mg Neotocite(Mn,Fe,Mg)SiO3 · H2O
AlAluminium
Al Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Al Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Al Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
SiSilicon
Si OkhotskiteCa2Mn3+Mn23+(Si2O7)(SiO4)(OH)2 · H2O
Si Neotocite(Mn,Fe,Mg)SiO3 · H2O
Si QuartzSiO2
Si Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Si BementiteMn7Si6O15(OH)8
Si Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Si RhodoniteMn2+SiO3
Si InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Si Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
Si OpalSiO2 · nH2O
Si Quartz (var: Chalcedony)SiO2
PPhosphorus
P FluorapatiteCa5(PO4)3F
SSulfur
S ChalcopyriteCuFeS2
S PyriteFeS2
S BaryteBaSO4
CaCalcium
Ca OkhotskiteCa2Mn3+Mn23+(Si2O7)(SiO4)(OH)2 · H2O
Ca CalciteCaCO3
Ca Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Ca FluorapatiteCa5(PO4)3F
Ca Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Ca InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Ca Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
MnManganese
Mn OkhotskiteCa2Mn3+Mn23+(Si2O7)(SiO4)(OH)2 · H2O
Mn PyrolusiteMn4+O2
Mn PsilomelaneMn, O
Mn RhodochrositeMnCO3
Mn Neotocite(Mn,Fe,Mg)SiO3 · H2O
Mn Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Mn BementiteMn7Si6O15(OH)8
Mn Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Mn RhodoniteMn2+SiO3
Mn InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Mn Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
FeIron
Fe HematiteFe2O3
Fe MagnetiteFe2+Fe23+O4
Fe Neotocite(Mn,Fe,Mg)SiO3 · H2O
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
SrStrontium
Sr Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
BaBarium
Ba BaryteBaSO4

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Kenji Togari, Masahide Akasaka and Yoshiyuki Kawaguchi (1986) Inesite from the Kokuriki Mine, Hokkaido, Japan. Jour. Fac. Sci., Hokkaido Univ., Ser. IV, vol. 21, no. 4, Feb., 1986, pp. 669-677.
Togari, K., & Akasaka, M. (1987). Okhotskite, a new mineral, an Mn3+-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine, 51(62), 611-614.

Other Regions, Features and Areas containing this locality

AsiaContinent
Okhotsk PlateTectonic Plate

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