Monument Creek Mine, Ruby Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
Regional Level Types | |
---|---|
Monument Creek Mine | Mine |
Ruby Mining District | Mining District |
Yukon-Koyukuk Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
64° 16' 10'' North , 155° 25' 40'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Ruby | 165 (2017) | 52.3km |
Mindat Locality ID:
198959
Long-form identifier:
mindat:1:2:198959:8
GUID (UUID V4):
082614a7-0d5f-4e05-8576-8497069e25c9
Location: Monument Creek flows through the southwestern corner of the Ruby (B-5) Quadrangle. The area of interest is approximately 5 1/2 miles south of VABM Monument (USGS topographic map, 1952, minor revisions in 1973), which corresponds to location 24 of Cobb (1972 [MF405]). Coordinates are for the approximate midpoint of placer ground in section 13, T. 14 S., R. 17 E. of the Kateel River meridian. The placer ground extends for about a mile downstream from a point 1/2 mile above the tributary Rabbit Creek. The discovery claim was made at the mouth of Rabbit Creek. The location is accurate.
Geology: The bedrock underlying Monument Creek is likely intermediate to mafic intrusive rocks (Puchner and others, 1998). Granite is present on a headwater divide to the north of the creek, and rocks peripheral to this body may be the source of the metals in the placer gravels (Eberlein and others, 1977). Gold was discovered along Monument Creek during the winter of 1912-13 (Eakin, 1914). About 1,450 ounces of gold and some byproduct silver were recovered between 1913 and 1933 (Mertie, 1936). Monument Creek was also explored from 1990 to 1993 (Swainbank and others, 1991; Bundtzen and others, 1992; Swainbank and others, 1993; Swainbank and others, 1995). The gold is found in an irregular, spotty pay streak 20 to 50 feet wide, about 1/2 mile above and below the mouth of Rabbit Creek (Mertie, 1936). At 1/4 mile below the mouth of Rabbit Creek (Discovery claim) 25 feet of muck is underlain by 15 feet of gravel. Gold is found in irregularly distributed, 3-to-6-inch-thick streaks of fine gravel. There is little or no gold on bedrock (Mertie, 1936). The gold is both fine and coarse, and the largest nugget weighed a little more than an ounce. The average of three assays showed 853 parts gold per thousand and 139 parts silver per thousand (Mertie, 1936). Cassiterite is also present with the gold (Mertie and Harrington, 1916; Chapin, 1919; Joesting, 1942).
Workings: Monument Creek was mined from 1913 to about 1933 (Mertie, 1936) and from 1990 to 1994 (Swainbank and others, 1991; Bundtzen and others, 1992; Swainbank and others, 1993; Swainbank and others, 1995).
Age: Quaternary.
Production: Total production for Monument Creek through 1933 was about 1,450 ounces (Mertie, 1936).
Commodities (Major) - Au; (Minor) - Ag, Sn
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
2 valid minerals.
Detailed Mineral List:
ⓘ Cassiterite Formula: SnO2 |
ⓘ Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
ⓘ | Gold | 1.AA.05 | Au |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Cassiterite | 4.DB.05 | SnO2 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | ⓘ Cassiterite | SnO2 |
Sn | Tin | |
Sn | ⓘ Cassiterite | SnO2 |
Au | Gold | |
Au | ⓘ Gold | Au |
Other Databases
Link to USGS - Alaska: | RB024 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Ruby DomainDomain
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