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Central tunnel, Ord Mountain Mine (Ord Mountain Mine System; Ord Mine; Ord Mountain deposits; Osborn; Rio Vista claim; Brilliant claim; Josephine claim; Belgium claim; Copper Junction claim), Ord Mountain, Ord Mountains, Ord Mining District, San Bernardino Co., California, USAi
Regional Level Types
Central tunnelTunnel
Ord Mountain Mine (Ord Mountain Mine System; Ord Mine; Ord Mountain deposits; Osborn; Rio Vista claim; Brilliant claim; Josephine claim; Belgium claim; Copper Junction claim)Mine
Ord MountainMountain
Ord MountainsMountain Range
Ord Mining DistrictMining District
San Bernardino Co.County
CaliforniaState
USACountry

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Key
Latitude & Longitude (WGS84):
34° 41' 9'' North , 116° 49' 41'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Barstow Heights24,202 (2006)29.2km
Barstow23,692 (2017)29.6km
Lucerne Valley5,811 (2011)29.8km
Lenwood3,543 (2011)32.9km
Apple Valley72,174 (2017)38.7km


A former Cu occurrence/mine located in secs. 12, 13 & 24, T7N, R1E, SBM.

The lower part of the principal workings of the Rio Vista-Central-England claims consist of the Central Tunnel, a crosscut adit (Level IV), which was driven eastward toward the Coupon Ledge in 1925 from a point on the England claim, about 400 feet west-northwest of, and 150 feet lower than, the portal of Level III of the Rio Vista workings (fig. 29). The adit is 770 feet long, with appended drifts that extend north and south on the Coupon Ledge, from a point 700 feet east of the portal of the adit, in ground covered by the Central claim. In 1953, the adit was caved beyond a point about 575 feet from the portal. J. L. Carder stated (personal communication, 1955) that the drifts "cut vein 30 feet wide, 15 feet of sulfide ore, with values of copper to 9 percent." Specimens of the vein rock found on the dump by the writer were composed chiefly of quartz and bornite, with subordinate proportions of chalcopyrite and chalcocite. The principal working developed from the surface of the Central claim is a 64-foot winze which was sunk from a short, east-driven crosscut adit whose portal is about 450 feet north-northeast of the portal of Level III of the Rio Vista workings (pi. 1). These workings intersected two veins which are 5 and 14 feet wide. A composite sample of the veins taken by Place (1917) showed 3.7 percent copper and $3.18 in gold and silver (gold valued at $20 per ounce).

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


4 valid minerals.

Detailed Mineral List:

Bornite
Formula: Cu5FeS4
Description: Occurs as veinlets in quartz vein fragments.
Reference: Weber, F.H., Jr. (1963c), Geology and mineral deposits of the Ord Mountain district San Bernardino County, California: California Division Mines & Geology Special Report 77: 25; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 111; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 95.
Chalcocite
Formula: Cu2S
Reference: Weber, F.H., Jr. (1963c), Geology and mineral deposits of the Ord Mountain district San Bernardino County, California: California Division Mines & Geology Special Report 77: 25.
Chalcopyrite
Formula: CuFeS2
Reference: Weber, F.H., Jr. (1963c), Geology and mineral deposits of the Ord Mountain district San Bernardino County, California: California Division Mines & Geology Special Report 77: 25.
Quartz
Formula: SiO2
Reference: Weber, F.H., Jr. (1963c), Geology and mineral deposits of the Ord Mountain district San Bernardino County, California: California Division Mines & Geology Special Report 77: 25.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Bornite2.BA.15Cu5FeS4
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

OOxygen
O QuartzSiO2
SiSilicon
Si QuartzSiO2
SSulfur
S BorniteCu5FeS4
S ChalcopyriteCuFeS2
S ChalcociteCu2S
FeIron
Fe BorniteCu5FeS4
Fe ChalcopyriteCuFeS2
CuCopper
Cu BorniteCu5FeS4
Cu ChalcopyriteCuFeS2
Cu ChalcociteCu2S

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A) In-text Citation No.
Weber, F.H., Jr. (1963c), Geology and mineral deposits of the Ord Mountain district San Bernardino County, California: California Division Mines & Geology Special Report 77: 25.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 111.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 95.

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

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