Gold Bar Mine (O'Brien Mine; Little Jim; Jenny Lynn; Interior Mining and Trust Co. Mine; Homestake; Crown; Black Bear), Amazon Wash, Constellation, Black Rock Mining District, Yavapai County, Arizona, USAi
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Latitude & Longitude (WGS84):
34° 5' 4'' North , 112° 34' 9'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Wickenburg | 6,806 (2017) | 19.6km |
| Yarnell | 649 (2011) | 22.4km |
| Peeples Valley | 428 (2011) | 25.1km |
| Morristown | 227 (2017) | 25.8km |
| Congress | 1,975 (2014) | 27.3km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Wickenburg Gem and Mineral Society | Wickenburg, Arizona | 20km |
| Black Canyon City Rock Club | Black Canyon City, Arizona | 39km |
| Daisy Mountain Rock & Mineral Club | Anthem, Arizona | 46km |
Mindat Locality ID:
48389
Long-form identifier:
mindat:1:2:48389:9
GUID (UUID V4):
02af94ec-0db2-426a-aa5d-ebf26b05d630
A former underground Au-Ag-Cu mine located 15 miles NE of Wickenburg & 2.7 miles NE of Constellation at about 3,400 feet of altitude (outcrop). Started 1888 by J. Mahoney. Subsequently owned by the Saginaw Lumber Co. (circa 1901- ); later, by the Interior Mining & Trust Co. (1907-1908), which mined the orebody from surface to 385 level on the incline; about 1915 the company reorganized into the Gold Bar Mining Co. Claims extend into the SE¼SE¼ of sec. 28, the W½SW¼ sec. 27, and the NW¼ of sec. 34.
Mineralization is a vein deposit principally in a medium-grained granite with some inclusions of schist. It is intruded by pegmatite, granite porphyry and basic dikes. Ore control was faulting, shearing and igneous activity - dikes. Ore concentration was oxidation at near surface. Alteration was minor to none.
The vein outcrops on the West side of O'Brien Gulch & occurs within a fissure zone that strikes N.70ºE. & dips 30ºNW. Its filling consists of coarsely-crystalline, glassy, grayish-white quartz. In places the quartz from the oxidized zone is rather cellular with cavities containing hematite & limonite. Oreshoot was a chimney that measured about 40 feet by 50 feet in cross-section at surface and plunged 30º SW.
Area structures include foliation in Precambrian schist and gneiss that trends N25E to N65E. Veins (and genetically-related [?]) dikes trend N10W to N40W and crosscut Precambrian fabric.
Workings include a vertical shaft to the 700 level (circa 1915). A 10-stamp mill was erected on the property.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Gold Formula: Au Description: Lode gold; free gold as fine to medium-coarse particles, both in quartz & with iron minerals. |
| ⓘ Hematite Formula: Fe2O3 |
| ⓘ 'Limonite' |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 Description: Occurs in altered wall rocks. |
| ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 Description: Occurs in altered wall rocks. |
| ⓘ Pyrite Formula: FeS2 |
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 4 - Oxides and Hydroxides | |||
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| Group 9 - Silicates | |||
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
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 | ⓘ Hematite | Fe2O3 |
| 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 | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Pyrite | FeS2 |
| Au | Gold | |
| Au | ⓘ Gold | Au |
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Great Plains DomainDomain
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References
