Vote for your favorite mineral in #MinCup26! - Cuprite vs. Halite
While externally similar shapes, these two minerals are very different inside.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Blackhawk Mine, Millersville, Loraine Mining District, Kern County, California, USAi
Regional Level Types
Blackhawk MineMine
Millersville- not defined -
Loraine Mining DistrictMining District
Kern CountyCounty
CaliforniaState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
35° 15' 47'' North , 118° 27' 38'' West
Latitude & Longitude (decimal):
35.26306,-118.46056
GRN:
N24W70
Type:
Mine
Köppen climate type:
BSk : Cold semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
Keene431 (2011)10.2km
Golden Hills8,656 (2011)13.7km
Tehachapi13,021 (2017)14.6km
Bear Valley Springs5,172 (2011)19.1km
Stallion Springs2,488 (2011)25.5km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Tehachapi Valley Gem & Mineral SocietyTehachapi, California15km
Mindat Locality ID:
79841
Long-form identifier:
mindat:1:2:79841:8
GUID (UUID V4):
0


A former Zn-Ag-Cu-Pb occurrence/mine located in the SW¼ (estimated) sec. 5, T31S, R33E, MDM, 4.5 km (2.8 miles) S of Millersville and 5.1 km (3.2 miles) SSW of Loraine, along the W canyon wall of Studhorse Canyon, near the head of the canyon. Operated during the periods 1944 to 1945 & 1951. MRDS database stated accuracy for this location is 10 meters.

Mineralization is a replacement type deposit hosted in limestone and quartz diorite. The ore body is irregular in form, strikes N45E and dips steeply NW. The metamorphic roof pendant strikes N30E and is several miles long and averages 1 mile in width. At the S end of the mine is a rhyolite porphyry dike a few tens of feet wide, that has intruded the metasedimentary rocks along a zone parallel to, and several feet SE of, the NW edge of the pendant. Irregular replacement of limestone near the contact between the metamorphic roof pendant and quartz diorite. This zone is bounded on the SE by a fine-grained phase of the rhyolite dike 1 to 2 fet wide and on the NW by a pale tactite body of undetermined thickness. Local rocks include pre-Cenozoic metasedimentary and metavolcanic rocks undivided.

Workings include underground openings comprised of 400 to 500 feet of horizontal workings accessible by 3 adits. Some ore may have been mined from a vertical shaft of undetermined depth at the portal of one of the adits.

Production data are found in: Troxel, and Morton (1962): 345.

Production statistics: Year: 1958 (period to 1958): Zn (accurate): from, less than 300 tons of ore the ore averaged 7½% Zn, 4% Pb, 0.5% Cu and 1 ounce Ag/ton.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


13 valid minerals.

Detailed Mineral List:

ⓘ Aurichalcite
Formula: (Zn,Cu)5(CO3)2(OH)6
Description: Occurs with other Pb-Cu-Zn minerals.
ⓘ Calcite
Formula: CaCO3
ⓘ Cerussite
Formula: PbCO3
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ Galena
Formula: PbS
ⓘ Goslarite
Formula: ZnSO4 · 7H2O
ⓘ Hemimorphite
Formula: Zn4Si2O7(OH)2 · H2O
ⓘ Malachite
Formula: Cu2(CO3)(OH)2
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
ⓘ Sphalerite
Formula: ZnS
Description: Substantial amounts were mined.
ⓘ Zincite
Formula: ZnO
Description: A minor mineral here.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘZincite4.AB.20ZnO
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘCerussite5.AB.15PbCO3
ⓘMalachite5.BA.10Cu2(CO3)(OH)2
ⓘAurichalcite5.BA.15(Zn,Cu)5(CO3)2(OH)6
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘGoslarite7.CB.40ZnSO4 · 7H2O
Group 9 - Silicates
ⓘHemimorphite9.BD.10Zn4Si2O7(OH)2 · H2O

List of minerals for each chemical element

HHydrogen
Hⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Hⓘ GoslariteZnSO4 · 7H2O
Hⓘ HemimorphiteZn4Si2O7(OH)2 · H2O
Hⓘ MalachiteCu2(CO3)(OH)2
CCarbon
Cⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Cⓘ CalciteCaCO3
Cⓘ CerussitePbCO3
Cⓘ MalachiteCu2(CO3)(OH)2
OOxygen
Oⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Oⓘ CalciteCaCO3
Oⓘ CerussitePbCO3
Oⓘ GoslariteZnSO4 · 7H2O
Oⓘ HemimorphiteZn4Si2O7(OH)2 · H2O
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ QuartzSiO2
Oⓘ ZinciteZnO
SiSilicon
Siⓘ HemimorphiteZn4Si2O7(OH)2 · H2O
Siⓘ QuartzSiO2
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ GalenaPbS
Sⓘ GoslariteZnSO4 · 7H2O
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
CaCalcium
Caⓘ CalciteCaCO3
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
CuCopper
Cuⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ MalachiteCu2(CO3)(OH)2
ZnZinc
Znⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Znⓘ GoslariteZnSO4 · 7H2O
Znⓘ HemimorphiteZn4Si2O7(OH)2 · H2O
Znⓘ SphaleriteZnS
Znⓘ ZinciteZnO
PbLead
Pbⓘ CerussitePbCO3
Pbⓘ GalenaPbS

Other Databases

Link to USGS MRDS:10103005

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060290998
Goodwin, Joseph Grant (1957) Lead and zinc in California. California Journal of Mines and Geology, Division of Mines: 53(3&4): 526.
Troxel, Bennie W., Morton, Paul K. (1962) Mines and Mineral Resources of Kern County California. County Report 1. California Division of Mines and Geologypp.345-346
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 89, 205, 218, 342.
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Quick NavTopMineral ListOther DatabasesOther RegionsReferences
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 29, 2026 03:10:06 Page updated: December 16, 2025 13:48:41
Go to top of page