Dieter; Cape Mountain Prospect, Port Clarence Mining District, Nome Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Dieter; Cape Mountain Prospect | Prospect |
| Port Clarence Mining District | Mining District |
| Nome Census Area | Census Area |
| Alaska | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
65° 34' 44'' North , 168° 0' 10'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Wales | 149 (2018) | 5.0km |
Mindat Locality ID:
197211
Long-form identifier:
mindat:1:2:197211:8
GUID (UUID V4):
906366af-7953-4fc4-8ab5-2a076722eb24
Location: The prospect adit (now caved) is at 1,700 feet elevation on the north side of the summit to Cape Mountain. Cape Mountain is the upland that makes up Cape Prince of Wales adjacent to Bering Strait on western-most Seward Peninsula. This is locality 1 of Cobb and Sainsbury (1972). Cobb (1975) summarized relevant references under the name 'Cape Mtn.'. It is also known as the Dieter prospect (Mulligan, 1966, p. 33).
Geology: The Cape Mountain (Dieter) prospect is a 418 foot-long adit, now caved, driven S 72 W to intersect an area of quartz veining in the Late Cretaceous (78.8 +/- 2.9 my; Hudson and Arth, 1983, p. 769) Cape Mountain biotite granite. The prospect is near the summit of Cape Mountain which is a roof pendant of marble and interlayered schist (Sainsbury, 1972). Steidtmann and Cathcart (1922, p. 99) reported finding cassiterite-bearing quartz vein material on the adit dump but a later effort by Mulligan (1966, p. 33) was unsuccessful in duplicating this result. The area of the prospect is in a part of the Cape Mountain biotite granite (Hudson and Arth, 1983) that has characteristics of a precursor phase rather than a mineralizing phase (Hudson and Reed, 1997, figure 3).
Workings: An adit was driven 418 feet S 72 W from a portal at 1700 feet elevation on the north side of the summit to Cape Mountain. Other surface prospect pits and short shafts were dug in the area.
Age: Late Cretaceous; cassiterite and related mineralization in this area is interpretated to be linked to the evolution of the Cape Mountain granite which has been determined to be 78.8 +/- 2.9 my old by the K/Ar method (Hudson and Arth, 1983, p. 769). .
Alteration: Alteration has not been described.
Commodities (Major) - Sn
Development Status: None
Deposit Model: Cassiterite-quartz vein in granite (Cox and Singer, 1986; model 15b?)
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 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Cassiterite | 4.DB.05 | SnO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Cassiterite | SnO2 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Sn | Tin | |
| Sn | ⓘ Cassiterite | SnO2 |
Other Databases
| Link to USGS - Alaska: | TE002 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Brooks-Seward DomainDomain
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.
References
