Pacific Mine (Pacific Coast Borax Company properties; Borate; Borate Colemanite Mines; Calico; Old Borate; Pacific Coast Borax Co. workings), Calico, Calico District (Daggett District; Calico-Daggett area), Calico Mts (Calico Hills), San Bernardino County, California, USAi
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
34° 57' North , 116° 49' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Barstow | 23,692 (2017) | 19.6km |
Barstow Heights | 24,202 (2006) | 23.6km |
Lenwood | 3,543 (2011) | 27.4km |
Fort Irwin | 8,845 (2011) | 36.8km |
Apple Valley | 72,174 (2017) | 60.2km |
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 |
---|---|---|
Mojave Desert Gem & Mineral Society | Barstow, California | 20km |
Mindat Locality ID:
26609
Long-form identifier:
mindat:1:2:26609:8
GUID (UUID V4):
e6417dcb-b957-4df5-977c-41b51eebe180
A former borate-gypsum-Sr occurrence/mine located in secs. 18, 19 & 20, T10N, R2E, and in secs. 23, 24 & 25, T10N, R1E, SBM, 4.3 km (2.7 miles) E of Calico in the Calico Hills. Discovered in 1882. First production was in 1884. Owned by the Pacific Coast Borax Company (1907- ). Production years were 1884 to 1907. MRDS database stated accuracy for this location is 500 meters.
Mineralization is hosted in the Fisset Brook Formation (lake sediments, shale, limestone). The ore body is 9.14 meters thick. Local rocks include Tertiary intrusive rocks (hypabyssal), unit 7 (Northern Mojave Desert) and/or Tertiary volcanic flow rocks, unit 16 (Northern Mojave Desert). This mine was the first underground mining of colemanite in the USA.
Borates occur as podiform and stratiform deposits. The pods occur below the bedded deposits. Five borate beds are exposed at the surface and range from 0.6 to 4.6 meters in thickness. The stratiform and podiform borates are separated by 15.2 meters of B-rich shale. Near the surface, colemanite has commonly been replaced by calcite. Local geologic structures include numerous faults. Sediments are severely folded.
Workings include underground openings. Many of the near-surface stopes have collapsed. The dumps are 18 to 21 meters high and several hundred meters wide. At one point, mining extended to a depth of 500 to 600 feet. The belt of borate workings extends 2.4 km.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
Mineral list contains entries from the region specified including sub-localities13 valid minerals.
Detailed Mineral List:
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
---|---|---|---|
β | Asbolane | 4.FL.30 | (Ni,Co)2-xMn4+(O,OH)4 Β· nH2O |
Group 5 - Nitrates and Carbonates | |||
β | Calcite | 5.AB.05 | CaCO3 |
β | Strontianite | 5.AB.15 | SrCO3 |
Group 6 - Borates | |||
β | Colemanite | 6.CB.10 | Ca[B3O4(OH)3] Β· H2O |
β | Howlite | 6.CB.20 | Ca2B5SiO9(OH)5 |
β | Borax | 6.DA.10 | Na2(B4O5)(OH)4 Β· 8H2O |
β | Ulexite | 6.EA.25 | NaCa[B5O6(OH)6] Β· 5H2O |
β | Boracite | 6.GA.05 | Mg3(B7O13)Cl |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
β | Celestine | 7.AD.35 | SrSO4 |
β | Gypsum | 7.CD.40 | CaSO4 Β· 2H2O |
β | Bassanite | 7.CD.45 | Ca(SO4) Β· 0.5H2O |
β | Fibroferrite | 7.DC.15 | Fe3+(SO4)(OH) Β· 5H2O |
Group 9 - Silicates | |||
β | Datolite var. Bakerite | 9.AJ.20 | Ca4(H5B5Si3O20) |
β | 9.AJ.20 | CaB(SiO4)(OH) | |
Unclassified | |||
β | 'Wad' | - | |
β | 'var. Cobalt-bearing Wad' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Asbolane | (Ni,Co)2-xMn4+(O,OH)4 · nH2O |
H | β Datolite var. Bakerite | Ca4(H5B5Si3O20) |
H | β Bassanite | Ca(SO4) · 0.5H2O |
H | β Borax | Na2(B4O5)(OH)4 · 8H2O |
H | β Colemanite | Ca[B3O4(OH)3] · H2O |
H | β Datolite | CaB(SiO4)(OH) |
H | β Fibroferrite | Fe3+(SO4)(OH) · 5H2O |
H | β Gypsum | CaSO4 · 2H2O |
H | β Howlite | Ca2B5SiO9(OH)5 |
H | β Ulexite | NaCa[B5O6(OH)6] · 5H2O |
B | Boron | |
B | β Datolite var. Bakerite | Ca4(H5B5Si3O20) |
B | β Boracite | Mg3(B7O13)Cl |
B | β Borax | Na2(B4O5)(OH)4 · 8H2O |
B | β Colemanite | Ca[B3O4(OH)3] · H2O |
B | β Datolite | CaB(SiO4)(OH) |
B | β Howlite | Ca2B5SiO9(OH)5 |
B | β Ulexite | NaCa[B5O6(OH)6] · 5H2O |
C | Carbon | |
C | β Calcite | CaCO3 |
C | β Strontianite | SrCO3 |
O | Oxygen | |
O | β Asbolane | (Ni,Co)2-xMn4+(O,OH)4 · nH2O |
O | β Datolite var. Bakerite | Ca4(H5B5Si3O20) |
O | β Bassanite | Ca(SO4) · 0.5H2O |
O | β Boracite | Mg3(B7O13)Cl |
O | β Borax | Na2(B4O5)(OH)4 · 8H2O |
O | β Calcite | CaCO3 |
O | β Celestine | SrSO4 |
O | β Colemanite | Ca[B3O4(OH)3] · H2O |
O | β Datolite | CaB(SiO4)(OH) |
O | β Fibroferrite | Fe3+(SO4)(OH) · 5H2O |
O | β Gypsum | CaSO4 · 2H2O |
O | β Howlite | Ca2B5SiO9(OH)5 |
O | β Strontianite | SrCO3 |
O | β Ulexite | NaCa[B5O6(OH)6] · 5H2O |
Na | Sodium | |
Na | β Borax | Na2(B4O5)(OH)4 · 8H2O |
Na | β Ulexite | NaCa[B5O6(OH)6] · 5H2O |
Mg | Magnesium | |
Mg | β Boracite | Mg3(B7O13)Cl |
Si | Silicon | |
Si | β Datolite var. Bakerite | Ca4(H5B5Si3O20) |
Si | β Datolite | CaB(SiO4)(OH) |
Si | β Howlite | Ca2B5SiO9(OH)5 |
S | Sulfur | |
S | β Bassanite | Ca(SO4) · 0.5H2O |
S | β Celestine | SrSO4 |
S | β Fibroferrite | Fe3+(SO4)(OH) · 5H2O |
S | β Gypsum | CaSO4 · 2H2O |
Cl | Chlorine | |
Cl | β Boracite | Mg3(B7O13)Cl |
Ca | Calcium | |
Ca | β Datolite var. Bakerite | Ca4(H5B5Si3O20) |
Ca | β Bassanite | Ca(SO4) · 0.5H2O |
Ca | β Calcite | CaCO3 |
Ca | β Colemanite | Ca[B3O4(OH)3] · H2O |
Ca | β Datolite | CaB(SiO4)(OH) |
Ca | β Gypsum | CaSO4 · 2H2O |
Ca | β Howlite | Ca2B5SiO9(OH)5 |
Ca | β Ulexite | NaCa[B5O6(OH)6] · 5H2O |
Mn | Manganese | |
Mn | β Asbolane | (Ni,Co)2-xMn4+(O,OH)4 · nH2O |
Fe | Iron | |
Fe | β Fibroferrite | Fe3+(SO4)(OH) · 5H2O |
Co | Cobalt | |
Co | β Asbolane | (Ni,Co)2-xMn4+(O,OH)4 · nH2O |
Ni | Nickel | |
Ni | β Asbolane | (Ni,Co)2-xMn4+(O,OH)4 · nH2O |
Sr | Strontium | |
Sr | β Celestine | SrSO4 |
Sr | β Strontianite | SrCO3 |
Other Databases
Link to USGS MRDS: | 10102220 |
---|
Localities in this Region
- California
- San Bernardino County
- Calico Mts (Calico Hills)
- Calico District (Daggett District; Calico-Daggett area)
- Calico
- Pacific Mine (Pacific Coast Borax Company properties; Borate; Borate Colemanite Mines; Calico; Old Borate; Pacific Coast Borax Co. workings)
- Calico
- Calico District (Daggett District; Calico-Daggett area)
- Calico Mts (Calico Hills)
- San Bernardino County
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mojave DomainDomain
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 #0060710539