Seikoshi mine, Izu City, Shizuoka Prefecture, Japan (original) (raw)
A gold and silver mine, worked from 1935 until 1983. The deposit was in altered volcanic rocks (propylitized Miocene andesite).
A road cut next to the mine was briefly famous for zeolite specimens (including yugawaralite crystals up to 3 cm long), but is now completely covered with concrete to prevent erosion.
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.
Mineral List
20 valid minerals.
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Beidellite | (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O |
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| H | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| H | ⓘ Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| H | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| H | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| H | ⓘ Scolecite | CaAl2Si3O10 · 3H2O |
| H | ⓘ Stellerite | Ca4(Si28Al8)O72 · 28H2O |
| H | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| H | ⓘ Wairakite | Ca(Al2Si4O12) · 2H2O |
| H | ⓘ Yugawaralite | CaAl2Si6O16 · 4H2O |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| O | ⓘ Beidellite | (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| O | ⓘ Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| O | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| O | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Scolecite | CaAl2Si3O10 · 3H2O |
| O | ⓘ Stellerite | Ca4(Si28Al8)O72 · 28H2O |
| O | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| O | ⓘ Wairakite | Ca(Al2Si4O12) · 2H2O |
| O | ⓘ Yugawaralite | CaAl2Si6O16 · 4H2O |
| Na | Sodium | |
| Na | ⓘ Beidellite | (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O |
| Na | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| Na | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Al | Aluminium | |
| Al | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| Al | ⓘ Beidellite | (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| Al | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| Al | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Al | ⓘ Scolecite | CaAl2Si3O10 · 3H2O |
| Al | ⓘ Stellerite | Ca4(Si28Al8)O72 · 28H2O |
| Al | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| Al | ⓘ Wairakite | Ca(Al2Si4O12) · 2H2O |
| Al | ⓘ Yugawaralite | CaAl2Si6O16 · 4H2O |
| Si | Silicon | |
| Si | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| Si | ⓘ Beidellite | (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| Si | ⓘ Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| Si | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| Si | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Scolecite | CaAl2Si3O10 · 3H2O |
| Si | ⓘ Stellerite | Ca4(Si28Al8)O72 · 28H2O |
| Si | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| Si | ⓘ Wairakite | Ca(Al2Si4O12) · 2H2O |
| Si | ⓘ Yugawaralite | CaAl2Si6O16 · 4H2O |
| S | Sulfur | |
| S | ⓘ Acanthite | Ag2S |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pearceite | [Ag6As2S7][Ag9CuS4] |
| S | ⓘ Polybasite | [Ag6Sb2S7][Ag9CuS4] |
| S | ⓘ Pyrargyrite | Ag3SbS3 |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| K | Potassium | |
| K | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| K | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| K | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Ca | Calcium | |
| Ca | ⓘ Beidellite | (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| Ca | ⓘ Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| Ca | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| Ca | ⓘ Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| Ca | ⓘ Scolecite | CaAl2Si3O10 · 3H2O |
| Ca | ⓘ Stellerite | Ca4(Si28Al8)O72 · 28H2O |
| Ca | ⓘ Wairakite | Ca(Al2Si4O12) · 2H2O |
| Ca | ⓘ Yugawaralite | CaAl2Si6O16 · 4H2O |
| Mn | Manganese | |
| Mn | ⓘ Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | ⓘ Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Pearceite | [Ag6As2S7][Ag9CuS4] |
| Cu | ⓘ Polybasite | [Ag6Sb2S7][Ag9CuS4] |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| As | Arsenic | |
| As | ⓘ Pearceite | [Ag6As2S7][Ag9CuS4] |
| Ag | Silver | |
| Ag | ⓘ Acanthite | Ag2S |
| Ag | ⓘ Gold var. Electrum | (Au,Ag) |
| Ag | ⓘ Pearceite | [Ag6As2S7][Ag9CuS4] |
| Ag | ⓘ Polybasite | [Ag6Sb2S7][Ag9CuS4] |
| Ag | ⓘ Pyrargyrite | Ag3SbS3 |
| Ag | ⓘ Silver | Ag |
| Sb | Antimony | |
| Sb | ⓘ Polybasite | [Ag6Sb2S7][Ag9CuS4] |
| Sb | ⓘ Pyrargyrite | Ag3SbS3 |
| Au | Gold | |
| Au | ⓘ Gold var. Electrum | (Au,Ag) |
| Au | ⓘ Gold | Au |
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