Octave Mine (Joker Mine; Bonanza Mine), Octave, Weaver Mining District (Virginia Mining District; Mocking Bird Mining District), Weaver Mountains, Yavapai County, Arizona, USAi
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Latitude & Longitude (WGS84):
34° 8' 38'' North , 112° 42' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Yarnell | 649 (2011) | 9.4km |
| Congress | 1,975 (2014) | 13.4km |
| Peeples Valley | 428 (2011) | 14.0km |
| Wickenburg | 6,806 (2017) | 19.6km |
| Morristown | 227 (2017) | 32.8km |
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 |
A former underground Au-Cu-Ag-Pb-Zn mine located at Octave, SW base of the Weaver Mountains at 3,300 feet of altitude. Started about 1860's (1865 ?). Reopened 1900-1905. Owned by the Octave Gold Mining Co. (to ultimate closure in 1912). Reopened again in 1908 by the Octave Mines Co. which developed the "Joker workings" until 1922. Finally, reopened in 1922 by Arizona Eastern Gold Mines Co., Inc. until 1930.
This mine is on a pediment. The pediment and mountains immediately NE of Octave consist mainly of grayish quartz diorite with included lenses of schist and NE-ward trending dikes of pegmatite, aplite and altered, fine-grained basic rock (altered diabase).
Mineralization is the Octave vein which occurs within a fault fissure that strikes N.70ºE. and dips from 20º to 30ºNW. It is several thousand feet along trace and intersected by 3 or 4 systems of post-vein faults of generally less than 100 feet of displacement. Filling consists of coarse-textured, massive to laminated, grayish-white quartz with irregular masses, disseminations and bands of sulfides. Vein is a few inches to 5 feet wide and averages 2¼ feet (67.5 cm) wide. In places it narrows abruptly and forms branching stringers.
There is a smaller vein about 25 feet from the main vein. The wall rocks are sericitized, silicified and carbonitized.
Two orebodies were found below the 600 level. The larger was followed for a horizontal distance of about 700 feet by a maximum height of 200 feet.
Area structures include veins parallel to mafic dikes which trend NE and dip at low angles, usually less than 40 degrees. Foliation in Precambrian metamorphic rocks trends N10E to N25E. The granitic rocks are unfoliated.
Mined to a depth of 2,000 feet on incline (1900-1905) plus 2,000 feet along strike. The Joker shaft is 1,250 feet deep on incline. This shaft connects with a few thousand feet of drifts. The old Octave workings included 4 shafts and several thousand feet of drifts and extensive stopes on 3 oreshoots.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 Description: Sparse; 8 to 25 oz. Au/T. |
| ⓘ Chalcopyrite var. Gold-bearing Chalcopyrite Formula: CuFeS2 with Au Description: Sparse; 8 to 25 oz. Au/T. |
| ⓘ Galena Formula: PbS Description: More than 100 oz. Au/T. |
| ⓘ Galena var. Gold-bearing Galena Formula: PbS with Au Description: More than 100 oz. Au/T. |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
| ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 |
| ⓘ Native Gold Formula: Au Description: Little free lode gold; mostly in galena and other sulfides. |
| ⓘ Pyrite Formula: FeS2 Description: 3.5 to 7 oz. Au/T. |
| ⓘ Pyrite var. Gold-bearing Pyrite Formula: FeS2 Description: 3.5 to 7 oz. Au/T. |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | var. Gold-bearing Chalcopyrite | 2.CB.10a | CuFeS2 with Au |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | var. Gold-bearing Galena | 2.CD.10 | PbS with Au |
| ⓘ | Pyrite var. Gold-bearing Pyrite | 2.EB.05a | FeS2 |
| ⓘ | 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
Other Databases
| Link to USGS MRDS: | 10027632 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Great Plains DomainDomain
- Southern Basin and RangeWide Rift
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0040250935
