Unnamed Prospect (ARDF - CR224), Black Point, Moira Sound, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
55° 2' 25'' North , 132° 5' 8'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: This prospect is near Black Point, about 0.4 mile east of the northwest corner of section 12, T. 79 S., R. 88 E.
Geology: Smith (1914) described this prospect as a short adit and a flooded shaft. He notes a 'lead,' but provides no information about the ore or gangue minerals. The host rock is agglomerate or other pyroclastic rock that trends east and dips south; black shale and slate are nearby. The age of the rocks in the area has been variously interpreted. Eberlein and others (1983) mapped the strata as locally metamorphosed graywacke of Silurian or Ordovician age, near a large Paleozoic or Mesozoic granitic intrusion. Gehrels (1992) and Maas and others (1995) mapped them as pre-Ordovician metamorphosed volcanic and sedimentary rocks near a Silurian or Ordovician granitic intrusion. Brew (1996) called them Late Proterozoic and Cambrian Wales Group schist, phyllite, and marble, near a Tertiary granitic intrusion of intermediate composition. Most recently, Slack and others (2002) and S.M. Karl (oral communication, 2003) mapped the strata as Silurian and Ordovician, low-grade, regionally metamorphosed sedimentary and volcanic rocks.
Workings: The only workings are a short adit and a shallow shaft.
Age: If there is a mineral deposit at this site, it probably is the same age as or younger than the Silurian or Ordovician host rocks.
Development Status: None
List of minerals for each chemical element
Other Databases
| Link to USGS - Alaska: | CR224 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
- Alexander TerraneVolcanic Arc
- Queen Charlotte basinBasin
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