Dos Amigos Mine (Amigos 1-4 claims; Daniels Mine), Oro Blanco area mines (Oro Blanco Mine group), Oro Blanco Mining District (Ruby Mining District), Oro Blanco Mountains, Santa Cruz County, Arizona, USAi
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Latitude & Longitude (WGS84):
31° 25' 0'' North , 111° 14' 32'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Arivaca | 695 (2011) | 19.5km |
| Tumacacori-Carmen | 393 (2015) | 25.9km |
| Rio Rico | 18,962 (2011) | 25.9km |
| Tubac | 1,191 (2011) | 28.6km |
| Aduana del Sásabe | 1,295 (2018) | 29.4km |
‡Ref.: The Resources of Arizona - A Manual of Reliable Information Concerning the Territory, compiled by Patrick Hamilton (1881), Scottsdale, AZ.
Blake (1899).
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: 191.
Knight, L.H., Jr. (1970) Structure and mineralization of the Oro Blanco mining district, Santa Cruz County, Arizona: Tucson, University of Arizona, Ph.D. dissertation, 172 p., 7 sheets, scales 1:1,200, 1:6,000, 1:16,000, 1:24,000, 1:60,000, 1:62,500, and 1:358,000.
Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 65 (Table 4).
U.S. Bureau of Mines file data, Dos Amigos Mine.
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10039549, MRDS ID #M050258; and, Dep. ID #10137879, MAS ID #0040230051.
A former small Au-Ag-Pb-Cu mine located in the NW¼ sec. 20, T.23S., R.11E., SE of the Oro Blanco shaft, about ¾ mile North of the Tres Amigos mine and about 0.4 miles West of Ruby, on National Forest land. Produced 1934-1941. Owned at times, or in part, by Daniels; Artesia Investment Co.; and the Oro Blanco Mines Co. Owned by the Legend Group, Ltd. (1930).
Mineralization is irregular, lensing zone of brecciated to pulverized Cretaceous conglomerate cemented by finely crystalline quartz containing fine-grained gold and silver mineralization. Iron and manganese oxides. Mineralization is entirely within the oxidized zone. The zone strikes about N35ºW and dips almost vertically. The principal rocks are complexly faulted, arkosic conglomerates. A porphyritic rhyolite dike trends NE-SW and dips 50-52NW; cuts the Sidewinder Quartz Monzonite dike and the quartz vein. The host rock unit is the Oro Blanco Formation. An associated rock unit is the Sidewinder Quartz Monzonite. Alteraton is minor.
Workings include a 100 foot (30.48 meters) deep shaft (1881), some drifts and an adit tunnel more than 700 feet (213.36 meters) long, extending through the hill.
List of minerals for each chemical element
Other Databases
| Link to USGS MRDS: | 10039549 |
|---|
Other Regions, Features and Areas containing this locality
Mexico
- Sierra Madre OccidentalMountain Range
North AmericaContinent
- Sonoran DesertDesert
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Southern Basin and RangeWide Rift
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