Rob Roy Mine, Margarita Mine group, Ruby, Oro Blanco Mining District (Ruby Mining District), Oro Blanco Mountains, Santa Cruz County, Arizona, USAi
| Regional Level Types | |
|---|---|
| Rob Roy Mine | Mine |
| Margarita Mine group | - not defined - |
| Ruby | Town (Former) |
| Oro Blanco Mining District (Ruby Mining District) | Mining District |
| Oro Blanco Mountains | Mountain Range |
| Santa Cruz County | County |
| Arizona | State |
| USA | Country |
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Latitude & Longitude (WGS84):
31° North , 111° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
Type:
Köppen climate type:
Ref.: 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: 191-192.
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: 64 (Table 4).
Arizona Bureau of Mines file data.
A Au-Ag-Pb-Zn-Cu mine located in the NE ¼ sec. 7, T.23S., R.11E. Owned at times, or in part, by the Gold Zone Mining Co.; McDonald; Margarita Gold Mines Co.; Daniels; and, Wechler.
Mineralization is irregular, silicified blanket zone of numerous quartz veinlets and stringers containing abundant pyrite and very fine grained gold and silver mineralization associated mainly with oxidized sulfides. Country rock is a strongly silicified and sericitized Jurassic volcanic tuff.
Workings include numerous open cut, shaft and adit operations. Originally worked in the 1890's, but mostly in 1903 and from 1933 through 1941. The group produced some 4,400 tons of ore averaging about 0.3 oz. Au/T, 0.6 oz. Ag/T, and minor Pb & Cu.
Mineralization is lensing quartz-fissure veins containing spotty sulfides, partly oxidized. Wall rocks are Jurassic volcanic flows and tuff or Cretaceous sediments.
Workings are shaft operations. probably originally prospected in the late 1800's but worked mainly during 1939-1940 and 1947-1948 when the group produced some 220 tons of ore averaging about 8% Zn, 4% Pb, 1 oz. Ag/T, and minor gold and copper.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Gold Formula: Au Description: As very fine-grained lode gold. |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 Description: In strongly sericitized Jurassic volcanic tuff country rock. |
| ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 Description: In strongly sericitized Jurassic volcanic tuff country rock. |
| ⓘ Pyrite Formula: FeS2 Description: Abundant in numerous quartz veinlets & stringers. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 9 - Silicates | |||
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| O | Oxygen | |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Au | Gold | |
| Au | ⓘ Gold | Au |
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
- Mojave DomainDomain
- Southern Basin and RangeWide Rift
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