Jualpa; Last Chance Basin Mine, Juneau Mining District, Juneau, Alaska, USAi
| Regional Level Types | |
|---|---|
| Jualpa; Last Chance Basin Mine | Mine |
| Juneau Mining District | Mining District |
| Juneau | City Borough |
| Alaska | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
58° 18' 25'' North , 134° 23' 38'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Juneau | 32,756 (2017) | 1.6km |
Location: This placer mine is at an elevation of approximately 300 feet in the Last Chance Basin of Gold Creek. It is 1 mile south-southeast of Mt. Juneau and 1/2 mile west of The Horn. It is in the NW1/4NW1/4 section 24, T. 41 S., R. 67 E. of the Copper River Meridian. The location is accurate.
Geology: The Jualpa placer was discovered by Joe Juneau and Richard Harris in 1880. A 4,250-foot flume was constructed and a 2000-foot drainage tunnel was driven in 1897. This tunnel is currently (2001) used for water storage for the City of Juneau. The gravels in Gold Creek were hydraulically mined in the early 1900's but debris and floods made mining difficult (Spencer, 1906). The gravel deposit is 4,000 feet long and 700 feet wide, with a maximum thickness of 90 to 100 feet. The gravels are in a glacially scoured basin that was dammed by a landslide which caused rapid gravel accumulation. Gold was recovered from the placer but no production records are available. There is a resource of 5.7 million cubic yards of auriferous gravel but the deposit is in the City of Juneau's watershed, which precludes development (Redman and others, 1989).
Workings: The Jualpa placer deposit was discovered by Joe Juneau and Richard Harris in 1880. A 4,250-foot flume was constructed and a 2000-foot drainage tunnel was driven in 1897. This tunnel is currently (2001) used for water storage for the City of Juneau.
Age: Quaternary.
Production: Gold was recovered from the placer but no production records are available.
Reserves: There is a resource of 5.7 million cubic yards of auriferous gravel but the deposit is in the city of Juneau's watershed, which precludes development.
Commodities (Major) - Au
Development Status: Yes; small
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a)
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
1 valid mineral.
Detailed Mineral List:
| ⓘ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
List of minerals for each chemical element
| Au | Gold | |
|---|---|---|
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | JU145 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America PlateTectonic Plate
- Taku DomainDomain
- Yukon-TananaVolcanic Arc
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
