The Khotol Ridge is a zinc and lead 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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Khotol Ridge MRDS details
Site Name
Primary: Khotol Ridge
Secondary: Sunny Day
Secondary: Honkette
Commodity
Primary: Zinc
Primary: Lead
Secondary: Gold
Secondary: Silver
Secondary: Copper
Location
State: Alaska
District: Kaiyuh
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
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: Locally conspicuous iron-oxide alteration.
Rocks
Not available
Analytical Data
Not available
Materials
Gangue: Limonite
Comments
Comment (Deposit): Model Name = Pb-Zn gossan; pluton-related epigenetic (?)
Comment (Workings): Workings / Exploration = These occurrences were discovered by Anaconda Minerals Company in 1982 (Flanigan, 1998).
Comment (Exploration): Status = Probably inactive
Comment (Reference): Primary Reference = Flanigan, 1998
Comment (Geology): Age = Flanigan (1998) interprets these gossans to be related to magmatic fluids from the Khotol pluton, based on their proximity to the pluton and their low molybdenum content . K-Ar and Ar/Ar dates for the Khotol pluton are approximately 110 Ma (Flanigan, 1998).
Comment (Geology): Geologic Description = The Khotol Ridge gossan is associated with biotite granite of the Khotol pluton, quartz-mica schist, quartzite, and minor graphitic schist. A transitional phase of quartz-eye biotite schist occurs along the contact between the Khotol pluton and the quartz-mica schist. This quartz-mica schist overlies the quartzite, strikes northeast, and dips approximately 40 degrees southeast. The quartzite resembles that at the nearby Illinois Creek mine (NL023) and commonly contains euhedral limonite pits after pyrite. The quartzite unit can be traced nearly continuously for over 10 km from hill 1677 (NL015) southwest through the Sunny Day gossan to just south of the Honker prospect (NL018). Grab and soil samples at Khotol Ridge contain up to 231 ppm copper, 6750 ppm lead, 1190 ppm zinc, 16 ppm silver, 3600 ppm manganese, 850 ppm arsenic, and 40 ppb gold (Flanigan, 1998). The Sunny Day gossan consists of scattered limonite-quartzite breccia and minor massive, vuggy, gossan float. It is in an east-west trending gully coincident with an airphoto lineament. Quartzite in this area is similar to quartzite at Illinois Creek (NL023) and Khotol Ridge. Several soil, rock, and stream samples are only weakly mineralized, with values up to 3.0 ppm silver, and less than 1000 ppm arsenic (Flanigan, 1998). The Honkette gossan consists of a linear zone of millimeter- to centimeter-scale limonite veinlets in dark-gray andalusite hornfels. These veinlets are similar to veinlets in the wall rocks at the Honker prospect (NL018) (Flanigan, 1998). Flanigan (1998) interprets these gossans to be related to magmatic fluids from the Khotol pluton, based on their proximity to the pluton and their low molybdenum content . K-Ar and Ar/Ar dates for the Khotol pluton are approximately 110 Ma (Flanigan, 1998). Also see NL012-014, 016, and 019-022.
References
Reference (Deposit): Flanigan, B., 1998, Genesis and mineralization of ore deposits in the Illinois Creek region, West Central Alaska: University of Alaska, Fairbanks, M.Sc. thesis, 125 p., 2 plates.
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