Royal Development Co.

The Royal Development Co. 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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Site Name

Primary: Royal Development Co.
Secondary: Unnamed (southeast flank of White Mountain)

Commodity

Primary: Silver
Primary: Gold
Secondary: Iron
Secondary: Lead
Secondary: Copper

Location

State: Alaska
District: Chisana

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

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Gold
Ore: Anglesite
Ore: Cerussite
Ore: Chalcopyrite
Ore: Pyrite
Gangue: Garnet
Gangue: Magnetite
Gangue: Quartz

Comments

Comment (Reference): Primary Reference = Wayland, 1943, USGS B 933B

Comment (Exploration): Status = Inactive

Comment (Deposit): Model Name = Lode: disseminated, skarn, gossan?

Comment (Workings): Workings / Exploration = Surface and underground. Two tunnels driven between 1907 and 1914 totaled 130 ft in length. Mining was in surface cut where a 12 in to 4 ft width was mined along contact deposit. Sample taken over 16 in width across contact deposit assayed 0.06 oz/ton Au and 0.20 oz/ton Ag (Pilgrim, E.R., 1931). Ore containing almost 1.5 oz/ton Au milled in 1907 was probably not representative of deposit (USGS MF-655K, loc. 14). Extensive diamond drilling in 1980's.

Comment (Deposit): Other Comments = See also: Nabesna mine (NB016)

Comment (Geology): Geologic Description = Disseminated pyrite and quartz-pyrite veins in small diorite/granodiorite stock and in associated contact metamorphic aureole. The surface ore milled in 1907 was apparently derived from gossan overlying the contact between a Cretaceous diorite stock and host Triassic limestone. Gossan along intrusive contacts reported to pan free gold. See also: Nabesna mine (NB016).

Comment (Commodity): Ore Material = Gold (native)

References

Reference (Deposit): Moffit, F.H., 1943, Geology of the Nutzotin Mountains, Alaska, with a section on the igneous rocks, by R. C. Wayland, and Gold deposits near Nabesna, by R. C. Wayland, 1943: U.S. Geological Survey Bulletin 933-B, p. 103-199.

Reference (Deposit): Richter, D.H., Singer, D.A., and Cox, D.P., 1975, Mineral resources map of the Nabesna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-655-K, scale 1:250,000.

Reference (Deposit): Lowe, P.C., and others, 1982, Geologic map of the Nabesna B-5 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1566, scale 1:63,360.

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