Hyatt Ranch Mine

The Hyatt Ranch Mine is a mica, feldspar, and beryllium mine located in Larimer county, Colorado at an elevation of 8,140 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

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Site Name

Primary: Hyatt Ranch Mine

Commodity

Primary: Mica
Primary: Feldspar
Primary: Beryllium
Tertiary: Uranium
Tertiary: Lithium
Tertiary: Bismuth
Tertiary: Phosphorus-Phosphates

Location

State: Colorado
County: Larimer
District: Crystal Mountain (Storm Mountain) Pegmatite District

Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Not available

Ownership

Owner Name: Fred H. Hyatt
Years: 1948 -

Owner Name: Beryl Ores Co.
Years: 1948 -

Production

Year: 1948
Time Period: 1936-1948
Description: Cp_Grade: ^11.04% Beo

Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1936
Year Last Production: 1948
Discovery Year: 1936
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains

Mineral Deposit Model

Not available

Orebody

Form: LENTICULAR

Structure

Type: R
Description: Front Range Uplift

Type: L
Description: Thompson Canyon Fault, Mt Olympus Batholith, Ne-Trending Folds

Alterations

Alteration Type: L
Alteration Text: Fe Oxidation; Alteration Of Bi And U Minerals

Rocks

Name: Tonalite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

Name: Tonalite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic

Analytical Data

Analytical Data: THURSTON'S (1955) WALL ZONE SAMPLE CONTAINED 0.078% BEO. INNER INTERMEDIATE ZONE PRODUCTION INDICATED BERYL CONTENT OF 2.3% HAND SORTABLE. RARE MINERALS ESTIMATED AT 0.00X TO 0.0X% PHOSPHATES (OTHER THAN APATITE), 0.008% BI COMPOUNDS, AND 0.000X% U MINERALS. USBM TOOK TWO 7-TON SAMPLES FROM ADIT THAT CONTAINED 0.065% BEO (INNER INTERMEDIATE ZONE) AND 0.022% BEO (WALL ZONE).

Materials

Ore: Beryl
Ore: Muscovite
Gangue: Albite
Gangue: Apatite
Gangue: Garnet
Gangue: Bertrandite
Gangue: Tourmaline
Gangue: Bismuthinite
Gangue: Triphylite
Gangue: Uraninite
Gangue: Torbernite
Gangue: Purpurite
Gangue: Cleavelandite

Comments

Comment (Development): DEPOSIT DISCOVERED BY ROY HYATT IN 1936, WHO SHIPPED BERYL. NEXT LOCATED BY FRED HYATT WHO LEASED PROPERTY TO UNITED BERYLLIUM ORES AND METALS CORP. IN 1942, WHO OPERATED INTERMITTENTLY THROUGH 1943 UNDER ARRANGEMENT WITH RECONSTRUCTION FINANCE CORP. MINE IDLE UNTIL 1948, WHEN HYATT LEASED TO BERYL ORES CO. IN SEARCH FOR STRATEGIC BE, USGS DRILLED 6 CORE HOLES IN 1948 IN COOPERATION WITH AEC. USBM DRILLED 4 HOLES IN 1950 AND DROVE 272-FT EXPLORATORY ADIT, OPERATED A CONCENTRATING PLANT, AND DID METALLURGICAL TESTING.

Comment (Deposit): ZONED PEGMATITE TRENDS N 60 E, 30 TO 45 NW AND CONSISTS OF 1) CONTINUOUS WALL ZONE OF FINE-GRAINED PLAGIOCLASE-PERTHITE-QUARTZ PEGMATITE, WITH UPPER ZONE 1 TO 60 FT THICK, AVERAGING 25 FT, CONTAINING ACCESSORY MUSCOVITE, TOURMALINE, AND IRREGULARLY DISSEMINATED BERYL, AND LOWER ZONE UP TO 40 FT THICK AND COMPOSED OF PLAGIOCLASE AND QUARTZ WITH ACCESSORY PERTHITE, BERYL, AND MUSCOVITE; 2) OUTER INTERMEDIATE ZONE EXTENDING 130 FT ALONG HANGING WALL SIDE, UP TO 7 FT THICK, AND COMPOSED OF COARSE-GRAINED PERTHITE-QUARTZ PEGMATITE; 3) INNER INTERMEDIATE ZONE, CONTINUOUS, PINCH AND SWELLS FROM 2 TO 8 FT THICK, COMPOSED OF COARSE-GRAINED PLAGIOCLASE-QUARTZ-MUSCOVITE PEGMATITE CONTAINING FINE-TO VERY COARSE-GRAINED MUSCOVITE IN MINABLE STREAKS FROM 1 INCH TO 5 FT WIDE AND 1 TO 30 FT LONG (7%) AND 3% ACCESSORY MINERALS AND EUHEDRAL TO ANHEDRAL BERYL CRYSTALS UP TO 5 FT; 4) CORE OF VERY COARSE-GRAINED PERTHITE PEGMATITE WITH MINOR QUARTZ, PLAGIOCLASE, MUSCOVITE, TOURMALINE, AND GARNET, BERYL ON

Comment (Deposit): COR MARGINS, UP TO 240 FT LONG AND 25 FT WIDE, MIAROLITIC CAVITY CONTAINED BERTRANDITE.

Comment (Workings): LARGE OPEN CUT (118 X 47 FT, 35 FT DEEP); SECOND CUT (65 X 45 FT, 25 FT DEEP); USBM EXPLORATORY ADIT DRIVEN N 65 W FOR 272 FT WITH SHORT DRIFT.

Comment (Location): NEAR HEAD OF BOBCAT GULCH 2.1 MILES NW OF DRAKE, 6.7 MILES SE OF CRYSTAL MOUNTAIN ; INFO FROM LAND.ST :(1977)

References

Reference (Deposit): HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-1944: USGS PROF. PAPER 227, P. 99-102.

Reference (Deposit): MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 30.

Reference (Deposit): GILKEY, M.M., 1960, HYATT RANCH PEGMATITE, LARIMER COUNTY, COLO.: USBM RI-5643, 18 P. & &

Reference (Deposit): BRADDOCK, W.A., AND OTHERS, 1970, GEOLOGIC MAP OF THE DRAKE QUADRANGLE, LARIMER COUNTY, COLORADO: USGS MAP GQ-829.

Reference (Production): HANLEY AND OTHERS, 1950; THURSTON, 1955

Reference (Deposit): THURSTON, W.R., 1955, PEGMATITES OF THE CRYSTAL MOUNTAIN DISTRICT, LARIMER COUNTY, COLORADO: USGS BULL. 1011, 185 P., 13 PLS.

Colorado Mining Photos

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