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Horokanai placer, Uryugawa, Uryu-gun, Kamikawa Subprefecture, Hokkaidō, Japani
Regional Level Types
Horokanai placerPlacer
Uryugawa- not defined -
Uryu-gun- not defined -
Kamikawa SubprefectureSubprefecture
HokkaidōPrefecture
JapanCountry

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Key
Latitude & Longitude:
43° North , 142° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~117km
Locality type:


SEM/EDS of 9 grains, three of which were composites, yielded three mineral in addition to those already listed:

Osmium: Os.50Ir.30Ru.19,Fe.01; Os.53Ir.31Ru.13Fe.03; Os.50Ir.36Ru.14Fe.00.

Iridium: Ir.52Os.21Pt.12Ru.12Ni.03.

Unnamed "Pt2Fe" (Pt,Ir).67(Fe,Ni).33; (Pt,Cu).66(Fe,Ni).34.

Mineral species aready known from the locality included:

Tetraferroplatinum: Pt.49Fe.51

Isoferroplatinum: Pt.75Fe.25

Ruthenium: Ru.60((Os,Ir).40 which seems to yield Ru3(Os,Ir)2.

All analyses in mol percentages. Sample purchased form Excalibur Minerals, Peekskill, NY, in a glass capillary. R.C.Smith, II

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals. 2 (TL) - type locality of valid minerals.

Detailed Mineral List:

Gold
Formula: Au
Reference: Excalibur Mineral Co. specimens
Irarsite
Formula: (Ir,Ru,Rh,Pt)AsS
Reference: Urashima et al (1982) Reports of the Faculty of Science, Kagoshima University, 31, 129-140.
Iridium
Formula: (Ir,Os,Ru)
Reference: Robert C. Smith, II, Ph.D., P.G.
Isoferroplatinum
Formula: Pt3Fe
Reference: Excalibur Mineral Co. specimens and analyses.
Osmium
Formula: (Os,Ir,Ru)
Reference: Robert C. Smith, II, Ph.D., P.G.
Rutheniridosmine (TL)
Formula: (Ir,Os,Ru)
Type Locality:
Reference: Excalibur Mineral Co. specimens and analyses.
Ruthenium (TL)
Formula: (Ru,Ir)
Type Locality:
Reference: Urashima et al (1974) Mineralogical Journal, 7, 438-444.
Tetraferroplatinum
Formula: PtFe
Reference: Urashima et al (1976) Kagoshima Daigaku Rika Hokoku, 25, 165-171.
Tulameenite
Formula: Pt2CuFe
Reference: Excalibur Mineral Co. specimens and analyses.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Iridium1.AF.10(Ir,Os,Ru)
Isoferroplatinum1.AG.35Pt3Fe
Osmium1.AF.05(Os,Ir,Ru)
Rutheniridosmine (TL)1.AF.05(Ir,Os,Ru)
Ruthenium (TL)1.AF.05(Ru,Ir)
Tetraferroplatinum1.AG.40PtFe
Tulameenite1.AG.40Pt2CuFe
Group 2 - Sulphides and Sulfosalts
Irarsite2.EB.25(Ir,Ru,Rh,Pt)AsS

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Platinum Group Metals and Alloys
Iridium1.2.1.2(Ir,Os,Ru)
Isoferroplatinum1.2.5.1Pt3Fe
Osmium1.2.2.1(Os,Ir,Ru)
Rutheniridosmine (TL)1.2.2.3(Ir,Os,Ru)
Ruthenium (TL)1.2.2.2(Ru,Ir)
Tetraferroplatinum1.2.4.1PtFe
Tulameenite1.2.4.2Pt2CuFe
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Irarsite2.12.3.7(Ir,Ru,Rh,Pt)AsS

List of minerals for each chemical element

SSulfur
S Irarsite(Ir,Ru,Rh,Pt)AsS
FeIron
Fe IsoferroplatinumPt3Fe
Fe TetraferroplatinumPtFe
Fe TulameenitePt2CuFe
CuCopper
Cu TulameenitePt2CuFe
AsArsenic
As Irarsite(Ir,Ru,Rh,Pt)AsS
RuRuthenium
Ru Ruthenium(Ru,Ir)
Ru Rutheniridosmine(Ir,Os,Ru)
Ru Irarsite(Ir,Ru,Rh,Pt)AsS
RhRhodium
Rh Irarsite(Ir,Ru,Rh,Pt)AsS
OsOsmium
Os Rutheniridosmine(Ir,Os,Ru)
Os Osmium(Os,Ir,Ru)
IrIridium
Ir Rutheniridosmine(Ir,Os,Ru)
Ir Irarsite(Ir,Ru,Rh,Pt)AsS
Ir Iridium(Ir,Os,Ru)
PtPlatinum
Pt IsoferroplatinumPt3Fe
Pt TetraferroplatinumPtFe
Pt TulameenitePt2CuFe
Pt Irarsite(Ir,Ru,Rh,Pt)AsS
AuGold
Au GoldAu

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Urashima et al (1974) Mineralogical Journal: 7: 438-444.
Urashima et al (1976) Kagoshima Daigaku Rika Hokoku: 25: 165-171.
Urashima et al (1982) Reports of the Faculty of Science, Kagoshima University: 31: 129-140.

Other Regions, Features and Areas containing this locality

AsiaContinent
Okhotsk PlateTectonic Plate

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