Mariquitta Mine (Marquitta Mine; Mariquita prospect), Middle Camp Mountain, Middle Camp-Oro Fino Mining District, Dome Rock Mountains, La Paz County, Arizona, USAi

Regional Level Types
Mariquitta Mine (Marquitta Mine; Mariquita prospect)	Mine
Middle Camp Mountain	Mountain
Middle Camp-Oro Fino Mining District	Mining District
Dome Rock Mountains	Mountain Range
La Paz County	County
Arizona	State
USA	Country

‡Ref.: Bancroft, H. (1911), Reconnaissance of the ore deposits in northern Yuma County, Arizona, USGS Bull. 451: 81-82.

Jones, Jr., E.L. (1915), Gold Deposits near Quartzsite, Arizona, in Contributions to Economic Geology by F.L. Ransome & H.S. Gale, USGS Bull. 620: 45-57 (56).

Wilson, E.D., Cunningham, J.B., and Butler, G.M. (1934), Arizona Lode Gold Mines and Gold Mining (revised 1967), Arizona Bureau of Mines Bull. 137: 136.

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: 161 (Table 4).

Arizona Bureau of Mines file data.

Yale Peabody GNIS database (NOTE: this database is derived from USGS 1:24,000 topographic map data).

MRDS database Dep. ID file #10102570, MRDS ID M004238; and, Dep. ID #10137608, MAS ID #0040120329.

A small former surface and underground Au-Ag-Cu-Pb-Zn mine located in the SE¼ sec. 22 & sec. 27, T4N, R19W, north of the Oro Fino placers, 6 miles west of Quartzsite, on the eastern edge of the Dome Rock Mountains, at 1,100 feet of altitude, on BLM-administered land. Owned by various operators & Cooper.

Mineralization is a vein deposit. Spotty gold with silver and very minor oxidized base metals occur in a crushed, iron stained, lensing quartz vein along a fracture or fault zone in Mesozoic schist intruded by Laramide quartz monzonite. Wall rocks exhibit strong epidote and chloritization. A fairly large vein of quartz, carrying a little copper and gold, which has been roughly prospected, is the source of the ore extracted from this property. The vein is 1.22 meters wide, strikes S.20ºE. and dips 20ºNE, and lies in a slip or fault between parallel schist strata. The vein varies in width from a few inches to several feet, is fairly persistent in length, and apparently is lenticular.

Medium- to fine-grained quartz-mica schists, apparently intruded by much younger fine- to medium-grained granites or quartz monzonites, are the rocks in the immediate vicinity. The schists strike NW-SE and dip 20º NE, and they contain much epidote and chlorite besides the quartz and mica, with a large percentage of orthoclase feldspar and some unaltered but contorted biotite crystals.

Workings are old and not very extensive and include a shaft(s) and surface operations. This mine was worked intermittently from the late 1800's to the 1940's, producing some 180 tons of ore averaging about 0.6 oz. Au/T and 0.3 oz. Ag/T.

Other Databases

Link to USGS MRDS:	10102570

Other Regions, Features and Areas containing this locality