The Lydell is a gold mine located in Alaska.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
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Lydell MRDS details
Site Name
Primary: Lydell
Commodity
Primary: Gold
Location
State: Alaska
District: Willow Creek
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Wall-rock alteration within a few inches of the veins is intense, but seldom extends more than 10 to 12 inches beyond the quartz filling. Sericitization and carbonate alteration predominate, but there is some pyritization and in the outer parts of the alteration zone chloritization is present (Ray, 1954).
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Gold
Gangue: Quartz
Comments
Comment (Reference): Primary Reference = Katz, 1911
Comment (Workings): Workings / Exploration = Unknown amount of work completed, no important mineral values were found (Katz, 1911).
Comment (Deposit): Other Comments = Katz did not visit this prospect but obtained the information from 'reliable sources'.
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Late Cretaceous or younger; vein cuts the Late Cretaceous Willow Creek Pluton. Or Jurassic or younger if the veins cutting the schist are unrelated to the quartz vein along the contact.
Comment (Geology): Geologic Description = Quartz veins along the contact of Late Cretaceous quartz diorite and Jurassic (?) mica schist, smaller quartz veins are also present in the schist (Katz, 1911). The quartz diorite is part of the Late Cretaceous Willow Creek Pluton, a zoned pluton: the outer part consists of hornblende quartz diorite and lesser hornblende tonalite; the core consists of hornblende-biotite granodiorite, and lesser hornblende-biotite quartz monzodiorite and biotite quartz monzonite. Wall-rock alteration within a few inches of the veins is intense, but seldom extends more than 10 to 12 inches beyond the quartz filling. Sericitization and carbonate alteration predominate, but there is some pyritization and in the outer parts of the alteration zone chloritization is present (Ray, 1954). The schist is a Jurassic (?) quartz-albite-chlorite (+/- garnet-biotite) pelitic schist.
References
Reference (Deposit): Ray, R.G., 1954, Geology and ore deposits of the Willow Creek Mining district, Alaska: U.S. Geological Survey Bulletin 1004, 86 p.
Reference (Deposit): Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials in the Anchorage quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1095, 184 p.
Reference (Deposit): Katz, F.J., 1911, A reconnaissance of Willow Creek gold region: U.S. Geological Survey Bulletin 480-G, p. 139-152.
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