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Ohori mine (Ou'hori mine; Obori mine), Mogami, Yamagata, Japani
Regional Level Types
Ohori mine (Ou'hori mine; Obori mine)Mine
Mogami- not defined -
YamagataPrefecture
JapanCountry

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Latitude & Longitude (WGS84): 38° 44' 45'' North , 140° 27' 50'' East
Latitude & Longitude (decimal): 38.74583,140.46389
GeoHash:G#: xngukm6wv
Locality type:Mine
Köppen climate type:Cfa : Humid subtropical climate


Cu-Zn-bearing veinlets and dolerite dikes traversing Pb-Zn-bearing skarn formed from impure Mn-bearing Miocene limestone. The limestone bed is sandwiched between propylitized Miocene pyroclastics and andesitic or rhyolitic breccia. The skarn body itself was worked as Pb-Zn ore; the younger dolerite dikes as rich Cu-Zn ore.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

15 valid minerals.

Detailed Mineral List:

Bustamite
Formula: CaMn2+(Si2O6)
Reference: Geological Survey of Japan, 1960.; Akira Kato (2011) Reference informations on distributed specimens at the Ordinary Meeting of Mumeikai Group, No. 1 (April, 2011).
Calcite
Formula: CaCO3
Reference: Geological Survey of Japan, 1960.
Chalcopyrite
Formula: CuFeS2
Reference: Geological Survey of Japan, 1960.
'Chlorite Group'
Reference: Geological Survey of Japan, 1960.
Cosalite
Formula: Pb2Bi2S5
Reference: Yokoro, Y. and Nakashima, K. (2010): Ag-Cu-Pb-Bi-S Minerals Newly Discovered from the Ohori Base Metal Deposit, Yamagata Prefecture, NE Japan: Implications for Bi-metallogenesis in the Green-Tuff Region. Resource Geology, 60, 1-17.
Diopside
Formula: CaMgSi2O6
Reference: Takeuchi et al. (1961): Ou'hori mine, a Tertiary pyrometasomatic deposit, Yamagata Prefecture, Japan. Sci. Rept. Tohoku University, Ser. 3, v. 7, p. 153.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Geological Survey of Japan, 1960.
Felbertalite
Formula: Cu2Pb6Bi8S19
Reference: Yokoro, Y. and Nakashima, K. (2010): Ag-Cu-Pb-Bi-S Minerals Newly Discovered from the Ohori Base Metal Deposit, Yamagata Prefecture, NE Japan: Implications for Bi-metallogenesis in the Green-Tuff Region. Resource Geology, 60, 1-17.
Galena
Formula: PbS
Reference: Geological Survey of Japan, 1960.
Grossular
Formula: Ca3Al2(SiO4)3
Reference: Takeuchi et al. (1961): Ou'hori mine, a Tertiary pyrometasomatic deposit, Yamagata Prefecture, Japan. Sci. Rept. Tohoku University, Ser. 3, v. 7, p. 153.
'Gustavite-Lillianite Series'
Reference: Yokoro, Y. and Nakashima, K. (2010): Ag-Cu-Pb-Bi-S Minerals Newly Discovered from the Ohori Base Metal Deposit, Yamagata Prefecture, NE Japan: Implications for Bi-metallogenesis in the Green-Tuff Region. Resource Geology, 60, 1-17.
Krupkaite
Formula: PbCuBi3S6
Reference: Yokoro, Y. and Nakashima, K. (2010): Ag-Cu-Pb-Bi-S Minerals Newly Discovered from the Ohori Base Metal Deposit, Yamagata Prefecture, NE Japan: Implications for Bi-metallogenesis in the Green-Tuff Region. Resource Geology, 60, 1-17.
Neyite
Formula: Ag2Cu6Pb25Bi26S68
Reference: Yokoro, Y. and Nakashima, K. (2010): Ag-Cu-Pb-Bi-S Minerals Newly Discovered from the Ohori Base Metal Deposit, Yamagata Prefecture, NE Japan: Implications for Bi-metallogenesis in the Green-Tuff Region. Resource Geology, 60, 1-17.
Pyrite
Formula: FeS2
Reference: Geological Survey of Japan, 1960.
Sphalerite
Formula: ZnS
Reference: Geological Survey of Japan, 1960.
Stevensite ?
Formula: (Ca,Na)xMg3-x(Si4O10)(OH)2
Reference: Otsu, H., Shimazaki, Y., & Omachi, K. (1963). Stevensite from the Ohori mine. Bull. Geol. Surv. Jap, 14, 591-599.
Wollastonite
Formula: CaSiO3
Reference: Geological Survey of Japan, 1960.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Chalcopyrite'2.CB.10aCuFeS2
'Cosalite'2.JB.10Pb2Bi2S5
'Felbertalite'2.JB.25bCu2Pb6Bi8S19
'Galena'2.CD.10PbS
'Krupkaite'2.HB.05aPbCuBi3S6
'Neyite'2.JB.25iAg2Cu6Pb25Bi26S68
'Pyrite'2.EB.05aFeS2
'Sphalerite'2.CB.05aZnS
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
Group 9 - Silicates
'Bustamite'9.DG.05CaMn2+(Si2O6)
'Diopside'9.DA.15CaMgSi2O6
'Epidote'9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
'Grossular'9.AD.25Ca3Al2(SiO4)3
'Stevensite' ?9.EC.45(Ca,Na)xMg3-x(Si4O10)(OH)2
'Wollastonite'9.DG.05CaSiO3
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
'Gustavite-Lillianite Series'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
ø = 3
Krupkaite3.4.5.2PbCuBi3S6
2.5 < ø < 3
Cosalite3.5.9.1Pb2Bi2S5
Neyite3.5.1.1Ag2Cu6Pb25Bi26S68
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Grossular51.4.3b.2Ca3Al2(SiO4)3
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)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Single-Width Unbranched Chains, W=1 with chains P=3
Bustamite65.2.1.2CaMn2+(Si2O6)
Wollastonite65.2.1.1cCaSiO3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 clays
Stevensite ?71.3.1b.6(Ca,Na)xMg3-x(Si4O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
Felbertalite-Cu2Pb6Bi8S19
'Gustavite-Lillianite Series'-

List of minerals for each chemical element

HHydrogen
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Stevensite(Ca,Na)xMg3-x(Si4O10)(OH)2
CCarbon
C CalciteCaCO3
OOxygen
O BustamiteCaMn2+(Si2O6)
O CalciteCaCO3
O DiopsideCaMgSi2O6
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O GrossularCa3Al2(SiO4)3
O Stevensite(Ca,Na)xMg3-x(Si4O10)(OH)2
O WollastoniteCaSiO3
NaSodium
Na Stevensite(Ca,Na)xMg3-x(Si4O10)(OH)2
MgMagnesium
Mg DiopsideCaMgSi2O6
Mg Stevensite(Ca,Na)xMg3-x(Si4O10)(OH)2
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al GrossularCa3Al2(SiO4)3
SiSilicon
Si BustamiteCaMn2+(Si2O6)
Si DiopsideCaMgSi2O6
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si GrossularCa3Al2(SiO4)3
Si Stevensite(Ca,Na)xMg3-x(Si4O10)(OH)2
Si WollastoniteCaSiO3
SSulfur
S ChalcopyriteCuFeS2
S CosalitePb2Bi2S5
S FelbertaliteCu2Pb6Bi8S19
S GalenaPbS
S KrupkaitePbCuBi3S6
S NeyiteAg2Cu6Pb25Bi26S68
S PyriteFeS2
S SphaleriteZnS
CaCalcium
Ca BustamiteCaMn2+(Si2O6)
Ca CalciteCaCO3
Ca DiopsideCaMgSi2O6
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca GrossularCa3Al2(SiO4)3
Ca Stevensite(Ca,Na)xMg3-x(Si4O10)(OH)2
Ca WollastoniteCaSiO3
MnManganese
Mn BustamiteCaMn2+(Si2O6)
FeIron
Fe ChalcopyriteCuFeS2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
Cu FelbertaliteCu2Pb6Bi8S19
Cu KrupkaitePbCuBi3S6
Cu NeyiteAg2Cu6Pb25Bi26S68
ZnZinc
Zn SphaleriteZnS
AgSilver
Ag NeyiteAg2Cu6Pb25Bi26S68
PbLead
Pb CosalitePb2Bi2S5
Pb FelbertaliteCu2Pb6Bi8S19
Pb GalenaPbS
Pb KrupkaitePbCuBi3S6
Pb NeyiteAg2Cu6Pb25Bi26S68
BiBismuth
Bi CosalitePb2Bi2S5
Bi FelbertaliteCu2Pb6Bi8S19
Bi KrupkaitePbCuBi3S6
Bi NeyiteAg2Cu6Pb25Bi26S68

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Quaternary - Neogene
0 - 23.03 Ma



ID: 3190118
Cenozoic volcanic rocks

Age: Cenozoic (0 - 23.03 Ma)

Lithology: Mafic-intermediate volcanic rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
- Geology and Mineral Resources of Japan, pp. 163, 182-183 (Geological Survey of Japan, 1960).
- Kamitani, M., Okumura, K., Teraoka, Y., Miyano, S., and Watanabe, Y. (2007): Mineral Resources Map of East Asia. Geological Survey of Japan.
- Yokoro, Y. and Nakashima, K. (2010): Ag-Cu-Pb-Bi-S Minerals Newly Discovered from the Ohori Base Metal Deposit, Yamagata Prefecture, NE Japan: Implications for Bi-metallogenesis in the Green-Tuff Region. Resource Geology, 60, 1-17.
Yokoro, Y., Hanamuro, T., & Nakashima, K. (2013). Unique Origin of Skarn at the Ohori Base Metal Deposit, Yamagata Prefecture, NE Japan: C, O and S Isotopic Study. Resource Geology, 63(4), 384-393.

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