Hillsdale Mine (Chaboya-Hillsdale Mine; San Juan Bautista Mine; San Juan Mine; San Juan Quicksilver Mine; Sheboya Mine; Chapman Mine; Oak Hill Mine), Oak Hill, San Jose, Santa Clara County, California, USAi
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Latitude & Longitude (WGS84):
37° 17' 21'' North , 121° 51' 28'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Communications Hill | 11,267 (2019) | 0.2km |
| Seven Trees | 1,788 (2018) | 1.7km |
| Buena Vista | 1,704 (2018) | 6.3km |
| San Jose | 1,026,908 (2017) | 6.5km |
| Fruitdale | 935 (2018) | 7.0km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Santa Clara Valley Gem & Mineral Society | San Jose, California | 6km |
| Peninsula Gem & Geology Society, Inc. | Los Altos, California | 25km |
| Santa Cruz Mineral and Gem Society | Santa Cruz, California | 38km |
| Sequoia Gem and Mineral Society | Redwood City, California | 40km |
| Livermore Valley Lithophiles | Livermore, California | 44km |
A former Hg occurrence/mine located in the SW¼SW¼SW¼ sec. 27 & in secs. 28, 33 & 34, T7S, R1E, MDM, on the E slope of the Oak Hill, 4-5 miles S of San Jose center, on private land. MRDS database stated accuracy for this location is 100 meters.
NOTE: The coordinates provided are taken from the topo map at the mining symbols labeled as this mine.
Mineralization is related to a serpentine-sandstone contact. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains).
Workings include unspecified underground openings (the topo map reflects 4 adit symbols labeled as this mine at this point).
Production data are found in: U.S. Bureau of Mines unpublished file data.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
12 valid minerals.
Detailed Mineral List:
| ⓘ Albite Formula: Na(AlSi3O8) |
| ⓘ 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) |
| ⓘ 'Chalcodite' Formula: K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 |
| ⓘ 'Chlorite Group' |
| ⓘ Cinnabar Formula: HgS References: |
| ⓘ Clinozoisite Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| ⓘ Dolomite Formula: CaMg(CO3)2 Description: Occurs as veins of coarsely bladed material associated with opalized chalcedony and some cinnabar. References: |
| ⓘ 'Garnet Group' Formula: X3Z2(SiO4)3 |
| ⓘ Glaucophane Formula: ◻[Na2][Mg3Al2]Si8O22(OH)2 Description: Together with lawsonite comprises almost the entirety of a lawsonite-glaucophane schist. |
| ⓘ Lawsonite Formula: CaAl2(Si2O7)(OH)2 · H2O Description: Together with glaucophane comprises almost the entirety of a lawsonite-glaucophane schist. |
| ⓘ Magnesite Formula: MgCO3 Description: Occurs as euhedral crystals in a narrow vein. |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
| ⓘ Opal Formula: SiO2 · nH2O Description: Occurs as opalized chalcedony (sic). References: |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Stilpnomelane Formula: (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
| ⓘ Titanite Formula: CaTi(SiO4)O |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Cinnabar | 2.CD.15a | HgS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Opal | 4.DA.10 | SiO2 · nH2O |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Magnesite | 5.AB.05 | MgCO3 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| Group 9 - Silicates | |||
| ⓘ | Titanite | 9.AG.15 | CaTi(SiO4)O |
| ⓘ | Lawsonite | 9.BE.05 | CaAl2(Si2O7)(OH)2 · H2O |
| ⓘ | Clinozoisite | 9.BG.05a | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| ⓘ | Glaucophane | 9.DE.25 | ◻[Na2][Mg3Al2]Si8O22(OH)2 |
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | Stilpnomelane | 9.EG.40 | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
| ⓘ | 'Chalcodite' | 9.EG.40 | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 |
| ⓘ | Albite | 9.FA.35 | Na(AlSi3O8) |
| Unclassified | |||
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'Garnet Group' | - | X3Z2(SiO4)3 |
| ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| H | ⓘ Glaucophane | ◻[Na2][Mg3Al2]Si8O22(OH)2 |
| H | ⓘ Lawsonite | CaAl2(Si2O7)(OH)2 · H2O |
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Opal | SiO2 · nH2O |
| H | ⓘ Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
| H | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| H | ⓘ Chalcodite | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 |
| C | Carbon | |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| C | ⓘ Magnesite | MgCO3 |
| O | Oxygen | |
| O | ⓘ Albite | Na(AlSi3O8) |
| O | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Glaucophane | ◻[Na2][Mg3Al2]Si8O22(OH)2 |
| O | ⓘ Lawsonite | CaAl2(Si2O7)(OH)2 · H2O |
| O | ⓘ Magnesite | MgCO3 |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Opal | SiO2 · nH2O |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
| O | ⓘ Titanite | CaTi(SiO4)O |
| O | ⓘ Garnet Group | X3Z2(SiO4)3 |
| O | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| O | ⓘ Chalcodite | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 |
| F | Fluorine | |
| F | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Na | Sodium | |
| Na | ⓘ Albite | Na(AlSi3O8) |
| Na | ⓘ Glaucophane | ◻[Na2][Mg3Al2]Si8O22(OH)2 |
| Na | ⓘ Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Mg | ⓘ Glaucophane | ◻[Na2][Mg3Al2]Si8O22(OH)2 |
| Mg | ⓘ Magnesite | MgCO3 |
| Mg | ⓘ Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
| Mg | ⓘ Chalcodite | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 |
| Al | Aluminium | |
| Al | ⓘ Albite | Na(AlSi3O8) |
| Al | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Al | ⓘ Glaucophane | ◻[Na2][Mg3Al2]Si8O22(OH)2 |
| Al | ⓘ Lawsonite | CaAl2(Si2O7)(OH)2 · H2O |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
| Al | ⓘ Chalcodite | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 |
| Si | Silicon | |
| Si | ⓘ Albite | Na(AlSi3O8) |
| Si | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Si | ⓘ Glaucophane | ◻[Na2][Mg3Al2]Si8O22(OH)2 |
| Si | ⓘ Lawsonite | CaAl2(Si2O7)(OH)2 · H2O |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Opal | SiO2 · nH2O |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
| Si | ⓘ Titanite | CaTi(SiO4)O |
| Si | ⓘ Garnet Group | X3Z2(SiO4)3 |
| Si | ⓘ Chalcodite | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 |
| P | Phosphorus | |
| P | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| S | Sulfur | |
| S | ⓘ Cinnabar | HgS |
| Cl | Chlorine | |
| Cl | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
| K | ⓘ Chalcodite | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 |
| Ca | Calcium | |
| Ca | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Ca | ⓘ Lawsonite | CaAl2(Si2O7)(OH)2 · H2O |
| Ca | ⓘ Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
| Ca | ⓘ Titanite | CaTi(SiO4)O |
| Ca | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ti | Titanium | |
| Ti | ⓘ Titanite | CaTi(SiO4)O |
| Fe | Iron | |
| Fe | ⓘ Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
| Fe | ⓘ Chalcodite | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 |
| Hg | Mercury | |
| Hg | ⓘ Cinnabar | HgS |
Other Databases
| Link to USGS MRDS: | 10077478 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- California Coast RangesAccretionary Complex
- Franciscan DomainDomain
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