Dan Welsh Mine, La Paz Mining District (Weaver Mining District), Dome Rock Mountains, La Paz County, Arizona, USAi
| Regional Level Types | |
|---|---|
| Dan Welsh Mine | Mine |
| La Paz Mining District (Weaver Mining District) | Mining District |
| Dome Rock Mountains | Mountain Range |
| La Paz County | County |
| Arizona | State |
| USA | Country |
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Latitude & Longitude (WGS84):
33° 48' 41'' North , 114° 24' 15'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Poston | 285 (2011) | 19.9km |
| Quartzsite | 3,626 (2017) | 23.0km |
| Ehrenberg | 1,470 (2011) | 25.6km |
| Blythe | 19,208 (2017) | 28.6km |
| La Paz Valley | 699 (2011) | 30.1km |
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 |
|---|---|---|
| Quartzsite Roadrunners Gem & Mineral Club | Quartzsite, Arizona | 23km |
Other/historical names associated with this locality:
Dan Welsh prospect; Don Welsh prospect
A small former surface and underground Au-Ag mine located on the summit of a ridge near the south boundary of sec. 32 (SE¼ sec. 35 per MRDS), T.6N., R.21W, about 2 miles (3.22 km) S of Moon Mountain, on Native American Reservation land.
Mineralization is a quartz vein with an average width of 2 feet (ca. 61 cm). The vein trends east-west, dips from 60ºN to vertical, and can be traced for 1,000 feet (ca. 305 m). It pinches to a mere seam on the west side of the ridge 400 feet (ca. 122 m) from the shaft and disappears beneath outwash deposits on the east side of the ridge.
The enclosing wall rocks are a sandy mica schist of sedimentary origin and granite gneiss and amphibolite schist of igneous origin, all of Precambrian age. The schists trend about north-south and dip 20ºE., and the fracture filled by quartz the quartz vein cuts squarely across the schistose structure.
The vein matter is a massive, vitreous, iron-stained quartz containing plentiful disseminated pyrite cubes from 1/8 inch to ¼ inch square, or crystal aggregates an inch or more in diameter. The oxidized portion of the vein contains cavities from which pyrite had been weathered, some containing visible gold.
Workings include a 12 feet (3.66 m) deep shaft and several open cuts and short tunnels.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
2 valid minerals.
Detailed Mineral List:
| ⓘ Native Gold Formula: Au Description: Lode gold; specks in iron oxides in oxidized portion of the vein; also occurs as dendritic flakes in fracture planes. |
| ⓘ Pyrite Formula: FeS2 Habit: Crystals up to more than 2.5 cm diameter. References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10027940 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Sonoran DesertDesert
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mojave DomainDomain
- Southern Basin and RangeWide Rift
USA
- ⭔Colorado River Indian ReservationReservation
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