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Cinnabar Mine (Cinnabar group; Colonial Mining Co. property; Carlson claims; C.O. Carlson claims), Cinnabar, La Cholla District, Dome Rock Mts, La Paz Co., Arizona, USA

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‡Ref.: Bancroft, Howland (1910) Notes on the occurrence of cinnabar in central western Arizona, in Contributions to economic geology, 1909; Pt. 1, Metals and nonmetals except fuels: U.S. Geological Survey Bulletin 430, p. 151-153.

Bancroft, H. (1911), Reconnaissance of the ore deposits in northern Yuma County, Arizona, USGS Bull. 451: 82.

Lausen, C. & E. Gardner (1927), Quicksilver Resources of Arizona, Arizona Bureau of Mines Bull. 122: 29-31.

Wilson (1941).

Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geological Survey Branch Bull. 192, Index of Mining Properties in Yuma County, Arizona: 156 (Table 4).

Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Departmenty of Mines & Mineral Resources Open File Rept. 92-10: 8 (Table 1).

Bailey, E.H., USGS, personal files.

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10040385, MRDS ID #M055134; and, Dep. ID #10137841, MAS ID #0040120141.

A former surface and underground Hg-Cu-Au-Ag-Pb-Mo mine located in the NE corner of sec. 9, T2N, R20W (sec. 31, T3N, R20W per MRDS) (Cunningham Mountain 7.5 minute topo map), in the Dome Rock Mountains 8 miles SW of Quartzsite, on federal land. Discovered 1861. Owned at times, or in part, by the Colonial Mining Co.; and Mr. C. H. Coleman of Yuma, AZ. Operated by the Cinnabar Development Co.

Mineralization is a vein deposit with a tabular ore body with spotty, disseminated cinnabar and with minor metacinnabar, secondary copper minerals, gold, silver and sparse wulfenite with brecciated quartz, gouge, calcite, and siderite and strong iron oxide staining, in a fault fissure in Mesozoic metamorphosed schist. The ore zone is 1219. 2 meters long, 1.52 meters wide, strikes N53W, and dips vertically. Precambrian schists and granite are overlain and intruded by Tertiary volcanics. The Hg is probably derived from mercurial tetrahedrite. The ore has been leached near the surface. A parallel vein occurs for a few hundred feet. The richness of the ore is variable along the vein.

Workings include one 178 foot shaft; one 148 foot shaft; and 145 feet of drifts. The main shaft is 640 feet deep with seven levels. The lowest level extends 400 feet; stopes. Discovered in the 1880's but only worked from shafts and open cuts from 1904 through 1914. The mine was closed in 1914. Water stands in the mine. The workings achieved a depth of 195.007 meters. In 1908 between 100-140 flasks were produced. It produced roughly 116 or more flasks of mercury. Assays showed 0.06 Hg, 0.36 Hg; ore ran 8 pounds Hg per ton.

Mineral List

11 entries listed. 10 valid minerals.

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