The Lucky Hill-TMC is a silver and 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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Lucky Hill-TMC MRDS details
Site Name
Primary: Lucky Hill-TMC
Secondary: Rainbow Hill
Commodity
Primary: Silver
Primary: Gold
Secondary: Lead
Secondary: Zinc
Location
State: Alaska
District: Valdez 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
Model Name: Low-sulfide Au-quartz vein
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: The mineralization is associated with sericitic alteration and ankeritic carbonate.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Sphalerite
Ore: Pyrrhotite
Ore: Pyrite
Ore: Gold
Ore: Galena
Ore: Arsenopyrite
Gangue: Sericite
Gangue: Quartz
Gangue: Ankerite
Comments
Comment (Deposit): Model Name = Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Comment (Exploration): Status = Active?
Comment (Geology): Age = Early Tertiary, based upon Ar-Ar dating of sericite.
Comment (Geology): Geologic Description = The Lucky Hill-TMC prospect explores one of several mineral deposits in a belt south of Valdez Creek. The Valdez Creek area is underlain by pre-Upper Triassic pelitic clastic rocks, minor tuff, limestone lenses, and conglomerate. The rocks apparently vary abruptly in regional metamorphosed grade, from prehnite-pumpellyite through greenschist and amphibolite, to granulite. These rocks are intruded by Upper Jurassic alkali gabbro and by dioritic intrusions of Late Cretaceous and Early Tertiary age (Smith, 1981). The bedding and foliation of the strata strike about N 75 E and dip steeply northwest. Strike-slip faults having a similar orientation are also present, particularly on the south side of Valdez Creek (Smith, 1981). On the north side of the creek, a northwest-dipping thrust fault in part explains an apparent 'telescoping' of the metamorphic rocks. The Lucky Hill-TMC deposit apparently is in semischist and consists of free gold and minor pyrite, pyrrhotite, arsenopyrite, galena, and sphalerite in sheeted quartz veins that strike east-west and dip steeply to the northwest. A distinctive, yellowish, ankeritic carbonate accompanies the gold-quartz veins. Ar-Ar ages on primary micas from a dioritic pluton give an emplacement age of 90-100 Ma. The age of sericite in the veins is 57-63 Ma. Exploration trenching and drilling show at least five stacked gold-bearing, sheeted zones over a vertical range of 600 feet. Drill-inferred reserves have been established over a strike length of 1,000 feet on the western extension of the TMC zone. Induced polarization surveys have extended the zone along strike for over 5,000 feet (unpublished report by Fairbanks Exploration Inc.).
Comment (Workings): Workings / Exploration = There are numerous backhoe and dozer trenches on the prospect. Drilling has been done on the best portions of the prospect. Induced polarization surveys have been conducted along strike.
Comment (Reference): Primary Reference = Freeman, et al.,1990 (unpublished report by Fairbanks Exploration Inc.)
Comment (Reserve-Resource): Reserves = Drill-inferred reserves are 261,998 tons, averaging 0.151 ounce gold per ton (unpublished report by Fairbanks Exploration Inc.).
Comment (Deposit): Other Comments = There is excellent access by vehicle from the Denali Highway. From the old townsite of Denali, the road along the north side of lower Valdez Creek reclaimed area extends past Lucky Gulch. From Lucky Gulch a narrow trail along the east side of the Gulch can be followed southward up the hill to the prospect area.
References
Reference (Deposit): Wiltse, M.A., and Reger, R.D., 1989, Geologic map of Gold Hill and Lucky Hill, Valdez Creek mining district, Healy A-1 quadrangle, Alaska: Alaska Division of Geological & Geophysical Surveys, Public-data File 89-5, scale 1:12,000, 1 sheet.
Reference (Deposit): Smith, T.E., 1981, Geology of the Clearwater Mountains, south-central Alaska: Alaska Division of Geological & Geophysical Surveys Geologic Report 60, 72 p., 3 sheets, scale 1:63,360.
Reference (Deposit): Wiltse, M.A., 1988, Preliminary litho-geochemistry of Gold Hill and Lucky Hill, Valdez Creek mining district, Healy A-1 quadrangle, southcentral Alaska: Alaska Division of Geological & Geophysical Surveys, Public-data File 88-41, 9 p., 1 sheet, scale 1:12,000.
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