Unnamed Occurrence (ARDF - JU020; near Mt. Young), Glacier Bay Mining District, Juneau Mining District, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - JU020; near Mt. Young) | - not defined - |
| Glacier Bay Mining District | - not defined - |
| Juneau Mining District | Mining District |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
58° 53' 15'' North , 135° 34' 37'' West
Latitude & Longitude (decimal):
KΓΆppen climate type:
Mindat Locality ID:
200948
Long-form identifier:
mindat:1:2:200948:6
GUID (UUID V4):
b977fab0-10e9-484b-991c-b2528aa978c7
Location: This occurrence is 2 miles north of Mt. Young at an elevation of approximately 2,500 feet. It is in the SE1/4 section 28, T. 34 S., R. 59 E. of the Copper River Meridian. The location is accurate within 1/2 mile. There are several other geologically similar occurrences in the Mt. Young area (JU017, JU025); the locations given by Wells and others (1986) appear to be the most accurate.
Geology: This occurrence consists of short, quartz veins, usually less than 6 inches thick, and numerous altered zones, about 2 feet thick. The altered zones transect metavolcanic rocks, schist, hornfels, slate, and marble. A few zones are localized along the margins of mafic dikes that cut the metamorphic rocks. The altered zones consist mainly of hydrous iron oxides, carbonate minerals, and quartz; minor pyrite, chalcopyrite, barite, and clay minerals are also present (MacKevett and others, 1971). MacKevett and others (1971) also report that the highest analytical metal values were from a sample consisting of sulfides, chiefly pyrite, replacing metavolcanic rocks, and from a sample of altered hornfels. These samples contained 1500 ppm zinc and anomalous silver, chromium, copper, molybdenum, and lead. The rocks in the vicinity of this occurrence consist of deformed and metamorphosed Silurian or Devonian carbonate, clastic and volcanic clastic units that have been intruded by Upper Jurassic and Lower Cretaceous granitic and dioritic rocks (Brew and others, 1992). This occurrence is in a geologically complex area characterized by a variety of metamorphic rocks, small granitic plutons, and mafic dikes (MacKevett and others,1971).
Workings: Apparently only surface sampling.
Alteration: Iron-oxide alteration; clay alteration; hornfelsing.
Commodities (Major) - Zn; (Minor) - Ag, Ba, Cr, Cu, Mo, Pb
Development Status: None
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
4 valid minerals.
Detailed Mineral List:
| β Baryte Formula: BaSO4 |
| β Chalcopyrite Formula: CuFeS2 |
| β Pyrite Formula: FeS2 |
| β Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Quartz | 4.DA.05 | SiO2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| β | Baryte | 7.AD.35 | BaSO4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | β Baryte | BaSO4 |
| O | β Quartz | SiO2 |
| Si | Silicon | |
| Si | β Quartz | SiO2 |
| S | Sulfur | |
| S | β Baryte | BaSO4 |
| S | β Chalcopyrite | CuFeS2 |
| S | β Pyrite | FeS2 |
| Fe | Iron | |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Pyrite | FeS2 |
| Cu | Copper | |
| Cu | β Chalcopyrite | CuFeS2 |
| Ba | Barium | |
| Ba | β Baryte | BaSO4 |
Other Databases
| Link to USGS - Alaska: | JU020 |
|---|
Other Regions, Features and Areas containing this locality
North America
- Coast MountainsMountain Range
North America PlateTectonic Plate
- Alexander DomainDomain
USA
- Alaska
- Juneau Mining DistrictMining District
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References
