Rand District (Randsburg District), Rand Mountains, Kern County, California, USAi

Regional Level Types
Rand District (Randsburg District)	Mining District
Rand Mountains	Mountain Range
Kern County	County
California	State
USA	Country

A principally Au-Ag-W mining area located around Randsburg, in the NE Rand Mountains. NOTE: There is no listing for this locality in the USGS MRDS database.

Location: The Rand or Randsburg district straddles the Kern-San Bernardino County line in the vicinity of the town of Randsburg, about 40 miles NE of Mojave and 30 miles N of Kramer. The western part of the district, in Kern County, has been chiefly a source of gold, while the eastern part, in San Bernardino County, has been largely a source of silver. The Atolia tungsten district is just to the southeast (fig. 30).

History: Although this region was prospected as early as the 1860's, it was not until placer gold was discovered in 1893 in Goler Wash, in the El Paso Mountains 15 miles to the W, that there was any mineral production. Numerous short-lived dry-washing camps soon sprang up in the entire region. The Yellow Aster mine, originally known as the Olympus, was located in 1895. Other discoveries were made, and the rich ore recovered in these early operations led to a gold rush. The district was named for the Rand district in South Africa. The ore was first shipped out for treatment, but a 100-stamp mill was erected at the Yellow Aster mine in 1901 and other mills were built soon afterward. During the early days some difficulty was encountered in concentrating the gold because of the presence of "heavy spar" or scheelite. Large-scale gold mining continued until 1918. The famous and highly productive Kelly or California Rand silver mine was discovered in 1919 and was operated on a major scale through the 1930's. Gold production from the district was substantial in the 1930's and early 1940's, and there has been intermittent prospecting and development work since. The total gold
output of the district is estimated at more than $20 million (period values). During the two world wars and the Korean War, Atolia was the source of large amounts of tungsten ore. From 1897 until 1933 Randsburg was served by a branch of the Santa Fe Railroad, which extended N from the main line at Kramer.

Geology: The principal rocks underlying the district
are the Precambrian Rand Schist and the Atolia Quartz Monzonite of Mesozoic age. The Rand Schist is chiefly biotite schist with smaller amounts of amphibolite and quartzite. To the E are poorly consolidated clays, sandstones, and conglomerates of continental origin, which are overlain by andesite at Red Mountain. Rhyolite and latite intrusives are in the east-central part of the district.

Ore Deposits: Most of the lode-gold deposits are in veins that occur along faults, except at the Yellow Aster mine, where the gold is in a series of closely spaced veinlets in small fractures. The majority of the gold deposits are in the schist, which is more widespread than the quartz monzonite, and nearly all are in an area where the rocks have been colored a pale red by iron oxides (fig. 30). The veins are unoriented but usually have a well-defined hanging wall. The ore bodies most commonly occur in the vein footwalls, usually at or near vein intersections or in sheared and brecciated zones. The ore consists of iron oxide-stained brecciated and silicified rock containing
native gold in fine grains and varying amounts of sulfides. The sulfides increase at depth, but the gold values decrease. Most mining has stopped where unoxidized sulfides were found in the veins, and the maximum depth of development is 600 feet. Milling ore contains from 1/7 to ¼ ounce of gold per ton. The high-grade ore nearly always occurs in pockets near the surface. Most of the placer gold has been recovered from dry placers at Stringer or in the Rand Mountains north of Randsburg.

Mines: Arizona, Baltic ($50,000), Barnett, Beehive, Big Dike ($200,000), Big Gold ($500,000), Black Hawk ($700,000), Buckboard ($500,000), Bully Boy ($120,000), Butte ($2 million), California, Consolidated ($50,000), Culbert, Gold Crown, Granton, Gunderson, Hawkeye, Hercules, King Solomon ($500,000), Little Butte ($400,000), Lucky Boy ($120,000), Merced, Minnehaha ($100,000), Mizpah Montana, Monarch Rand, New Deal, Operator Divide ($600,000), Pestle, Pinmore, Red Bird, Santa Ana group ($400,000), Sidney ($250,000), Snowbird, Sunshine ($1.06 million), Windy, Winnie, Yellow Aster ($12 million).

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References