Tropico Mines (H.B. claim; Home No. 1 & No. 2 claims; Kid claim; Antelope claim; Topeka claim; Hattie claim; Rosamond claim; Last Chance claim; Gold King claim; Pieute claim; Bonanza claim), Tropico Hill, Rosamond, Mojave-Rosamond Mining District (Mojave Mining District), Kern County, California, USAi

Regional Level Types
Tropico Mines (H.B. claim; Home No. 1 & No. 2 claims; Kid claim; Antelope claim; Topeka claim; Hattie claim; Rosamond claim; Last Chance claim; Gold King claim; Pieute claim; Bonanza claim)	Group of Mines
Tropico Hill	Hill
Rosamond	- not defined -
Mojave-Rosamond Mining District (Mojave Mining District)	Mining District
Kern County	County
California	State
USA	Country

A former group of lode Au occurrences/claims/mines located in secs. 10, 11, 14 & 15, T9N, R13W, MDM, 6.6 km (4.1 miles) WNW of Rosamond, on Tropico Hill, on private (patented) land. The properties comprise 11 patented claims covering 220 acres. Owned and operated by the Burton Brothers Inc. and H. Clifford Burton, Rosamond, California (1949- ). MRDS database accuracy for this location is not stated. A sketch map of the claims and workings is found in Tucker, W. Burling & Reid J. Sampson (1933).

Mineralization is hosted in rhyolite and granite. The ore body strikes E-W and dips 60S at a thickness of 15.24 meters. The controls for ore emplacement included fault fissures. Gangue minerals include quartz. Rhyolite occurs in thin layers with distinct faces (probably joint or shear planes, dipping 80S. Isolated masses of granitic rock give the impression of having been floated in by rhyolite. The veins are cut by a series of NW-striking faults, dipping 60W. Displacement along fissures was estimated to be up to 800 feet. There are 4 parallel veins. Most of the ore ranges from 3 to 10 feet in thickness. In places, 50 feet or more have been mined. Vein filling consists of brecciated, silicified rhyolite. W of the Kid shaft some of the best ore was found in an altered, brecciated granitic rock where less altered rock forms the footwall. The ore on the 800 foot level (about 1,080 feet on the dip) is of better grade than that of higher levels. Local rocks include Tertiary nonmarine rocks, undivided.

Workings include underground openings. Along a total length of 2,000 feet on the Home or Tropico, 4 faulted segments of what may have been the same ore shoot, was mined for 1,600 feet. Principal development is on the Home vein and consists of 3 shafts. The Fairview shaft, which is the easternmost, has been sunk to about 775 feet on a 60 degree inclination. The vertical Kid shaft, 1,000 feet W of the Tropico, is 850 feet deep. The kid shaft has been concreted to the 400 foot level. A fourth shaft, on the Lida vein, is 300 feet deep. Eight levels have been developed in the Home vein. The 600 and 700 foot levels extend from the Fairview shaft to the Kid shaft. Total development approximates 18,000 feet. Only the shrinkage method of stoping was used in the Fairview. It was also largely utilized to the 600 foot level in the other shafts, but below this level, all stopes are filled. There were two 5-acre millsites.

Production data are found in: Tucker, W. Burling & Reid J. Sampson (1933).

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Link to USGS MRDS:	10104171

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