Three Castle Mountain

The Three Castle Mountain 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

Name: Three Castle Mountain  

State:  Alaska

County:  na

Elevation:

Commodity: Zinc, Lead

Lat, Long: 65.226, -141.19900

Map: View on Google Maps

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.


Satelite image of the Three Castle Mountain

Three Castle Mountain MRDS details

Site Name

Primary: Three Castle Mountain


Commodity

Primary: Zinc
Primary: Lead
Secondary: Uranium
Secondary: Silver


Location

State: Alaska
District: Black


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: Gossans and local silicification of limestone, along a northeast-trending fault.


Rocks

Not available


Analytical Data

Not available


Materials

Ore: Pyrite


Comments

Comment (Geology): Geologic Description = The Three Castle Mountain area is underlain by limestone, shale, and dolomite from the upper Tindir Supergroup (Dover and Miyaoka, 1988). The Three Castle Mountain prospects lie 7 miles southwest of the Nation Gossan prospects (CY021); they exhibit the same type of mineralization and may be part of the same system (Northstar Exploration, Inc., 1999). The Three Castle Mountain prospects consist of northeast-trending gossans that are associated with sulfide mineralization in limestone fault breccias that may be thrust breccias. Lead, zinc, and silver anomalies are common in soil samples, with lead and zinc values ranging from 1,000-10,000 parts per million, and silver ranging from 0.1 to 0.5 ounces per ton. A dolomite sample with secondary silica and traces of pyrite also contained 3.25 parts per million uranium (Northstar Exploration, Inc., 1999). The Three Castle Mountain area has been explored since the mid-1970s by soil and rock sampling.

Comment (Geology): Age = Proterozoic or younger.

Comment (Reference): Primary Reference = Northstar Exploration, Inc., 1999

Comment (Workings): Workings / Exploration = The area has been explored since the mid-1970's by soil and rock sampling.

Comment (Deposit): Model Name = Fault-controlled Zn-Pb?

Comment (Exploration): Status = Active

Comment (Deposit): Other Comments = These prospects are located on Doyon, Limited selected or conveyed land. For more information, contact Doyon, Limited. This site is within the Yukon-Charley Rivers National Preserve.


References

Reference (Deposit): Northstar Exploration, Inc., 1999, 1998 Annual Report Kandik, Block 7: Fairbanks, Alaska. (Report held by Doyon, Limited, Fairbanks, Alaska.)

Reference (Deposit): Schmidt, J.M., 1997, Shale-hosted Zn-Pb-Ag and barite deposits of Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska, 1997: Economic Geology Monograph 9, p. 35-65.


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