Royal Dutch

The Royal Dutch 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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Site Name

Primary: Royal Dutch

Commodity

Primary: Gold

Location

State: Alaska
District: Aleutians

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

Model Name: Epithermal vein, generic

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Regional propylitic alteration; increased(?) wall-rock propylitic alteration in association with veining.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Gold

Comments

Comment (Reference): Primary Reference = Randolph, 1991

Comment (Workings): Workings / Exploration = Pan concentrate, rock, and soil sampling by BMEC (Randolph, 1991). Rock (vein) samples had gold values to 6.58 oz/t (225 ppm) gold, 0.1 oz/t (3.4 ppm) silver, and 6,167 ppm arsenic. Only two rock samples on NW margin of grid had anomalous mercury, but pan concentrates had high mercury. Twenty of 29 rock samples had gold greater than 130 ppb. Nineteen of those 20 contain more than 52 ppm As. Of the 8 rocks containing more than 400 ppm AS, 5 contained more than 1 ppm Au, suggesting a strong correlation between As and Au.

Comment (Deposit): Model Name = Epithermal gold vein

Comment (Geology): Geologic Description = Randolph (1991) reports this occurrence is very similar to Misty Mountain (UN012). "The prospect appears to be located within a transition zone between 2 regional rock packages. The lower package includes andesitic flows and tuffs and the upper package is a thick sequence of basaltic flows and lahars. *** Unlike Misty Mtn., both rock packages *** exhibit propylitic alteration, quartz veining, and intrusion by dioritic to gabbroic plutons (Randolph, 1991)." A wide-spaced cockscomb quartz/arsenopyrite vein system covers an area approximately 600 by 1,000 feet (180 x 300 m) and the veins have a dominant trend of N30x W. Veins approach 2 feet (0.7m) in thickness and vary in density from one vein to tens-of-feet to many veins per foot. In areas of high density veining the country rock is strongly propylitized and contains abundant epidote. Mineralization is restricted to the quartz veins.

Comment (Exploration): Status = Inactive

Comment (Geology): Age = Late Tertiary or younger

References

Reference (Deposit): Randolph, D.B., 1991, Unalaska project, 1990 final report: Battle Mountain Exploration Company, Alaska District, 62 p., 5 appendices, 15 plates, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)

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