Tornado Mine

The Tornado Mine is a gold and silver mine located in Lawrence county, South Dakota at an elevation of 5,919 feet.

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

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.

Site Name

Primary: Tornado Mine
Secondary: Golden Reward Group

Commodity

Primary: Gold
Primary: Silver

Location

State: South Dakota
County: Lawrence
District: Ruby Basin District

Land Status

Not available

Holdings

Not available

Workings

Type: Underground

Ownership

Owner Name: Golden Reward Mining And Milling Co.

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Replacement
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Black Hills

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Type: L
Description: Several Dikes And Minor Faults; One Fault With A 300-Feet Downthrow To The East Lies Just West Of The Main Workings.

Alterations

Alteration Type: L
Alteration Text: Some Oxidized Ore

Rocks

Name: Phonolite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Name: Phonolite
Role: Associated
Age Type: Host Rock
Age Young: Late Cambrian

Name: Phonolite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Cambrian

Analytical Data

Analytical Data: AVERAGE VALUE = 1 OZ AU/TON. IN THE NORTHERN PART OF THE MINE VALUES ARE 2 OZ AU/TON

Materials

Ore: Silver
Ore: Gold

Comments

Comment (Production): MOST PRODUCTIVE OF GOLDEN REWARD BUT SEPARATE FIGURES NOT AVAILABLE.

Comment (Location): SE 1/4 OF SEC. 1 AND EXTENDS INTO SEC. 6

Comment (Deposit): THICKNESS RANGES FROM 6 - 14 FT; 36 DISTINCT ORE SHOOTS. THE MAIN (TORNADO) SHOOT EXTENDS SOUTH WHERE IT IS KNOWN AS THE MOGUL SHOOT IN THE MOGUL MINE. ITS COMBINED LENGTH IN BOTH MINES IS 4153 FT AND WIDTH IS FROM 10 - 180 FT. THE SECOND LARGE SHOOT EXTENDED NORTH FOR 600 FT AND SOUTH FOR 1500 FT AND IS THE BOTTLESON SHOOT.

Comment (Development): UNDERLIES AT LEAST 12 CLAIMS; DEVELOPMENT THROUGH TORNADO SHAFT IN FANTAIL GULCH

References

Reference (Deposit): U.S. BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688 .

Reference (Deposit): SHAPIRO, L. H., AND GRIES, J. P., 1970 , ORE DEPOSITS IN ROCKS OF PALEOZOIC AND TERTIARY AGE OF THE NORTHERN BLACK HILLS, SOUTH DAKOTA, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY.

Reference (Deposit): SHAPIRO, L.H., AND GRIES, J.P., 1970, ORE DEPOSITS IN ROCKS OF PALEOZOIC AND TERTIARY AGE OF THE NORTHERN BLACK HILLS, SOUTH DAKOTA: SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY.

Reference (Production): U.S. BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688

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