Black Crook Mine

Past Producer in Hinsdale county in Colorado, United States with commodities Silver, Gold, Lead, Copper, Zinc, Antimony, Manganese

Sections on this page

Identification information
Geographic coordinates
Site location context
Geographic areas
Public Land Survey System information
Commodities
Materials information
Alteration
Host and associated rocks
Nearby scientific data
Geologic structures
Ore body information
Controls for ore emplacement
Economic information about the deposit and operations
Mining district
Land status
Ownership information
Production statistics
Links to other databases
Bibliographic references
General comments
Reporter information

Geologic information

Identification information

Deposit ID	10014672
MRDS ID	D011554
Record type	Site
Current site name	Black Crook Mine
Alternate or previous names	Ilma Mine, Ilma-Hiwassee Group, Patented Claims: Hiwassee, MS 8651, Black Crook, MS 11119, Ilma, MS 11119, Altair, MS 11119, Precious Metals, MS 11119, Palmer, MS 11235, Gold King, MS 11591, Florence, MS 12345, New Year, MS 12680
Related records	10191291

Geographic coordinates

Geographic coordinates:	-107.30063, 37.98279 (WGS84)
Elevation	3048
Relative position	3.4 MILES S 11 E FROM LAKE CITY

Site location context

Political divisions (FIPS codes)

Hinsdale(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Lake San Cristobal(quadrangle 1:24,000 scale)

Silverton(quadrangle 1:100,000 scale)

Durango(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Gunnison(hydrologic unit)

Gunnison(hydrologic accounting unit)

Gunnison(hydrologic subregion)

Upper Colorado(hydrologic region)

Geographic areas

Country	State	County
United States	Colorado	Hinsdale

Public Land Survey System information

Meridian	Township	Range	Section	Fraction	State
New Mexico	043N	004W	15,16		Colorado

Comments on the location information

CLAIMS LIE ON HILLSIDE WEST OF NORTH END OF LAKE SAN CRISTOBAL, ADJOINING GOLDEN FLEECE MINE WORKINGS. ELEV AND LAT-LONG GIVEN ARE FOR PORTAL OF SECOND LEVEL TUNNEL, SE NE SE SEC. 16. ; INFO FROM LAND.ST :1977

Commodities

Commodity	Importance
Silver	Primary
Gold	Primary
Lead	Secondary
Copper	Secondary
Zinc Critical	Tertiary
Antimony Critical	Tertiary
Manganese Critical	Tertiary

Materials information

Materials	Type of material
Chalcopyrite	Ore
Silver	Ore
Sphalerite	Ore
Barite	Gangue
Quartz	Gangue
Rhodochrosite	Gangue

Alteration

(Local) Oxidation Of Ag-Bearing Cu And Pb Sulfide To Pyrargyrite And Native Ag

Host and associated rocks

Host or associated

Associated

Rock type

Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyodacite

Stratigraphic age (youngest)	Oligocene
Stratigraphic age (youngest)	Oligocene
Stratigraphic age (youngest)	Miocene

Host or associated	Associated
Rock type	Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite
Rock unit name	Quartz Latite Of Volcanics Of Uncompahgre Peak;Quartz Latite Of Red Mountain;Quartz Latite Of Grassy Mountain
Rock description	Quartz Latite Of Volcanics Of Uncompahgre Peak;Quartz Latite Of Red Mountain;Quartz Latite Of Grassy Mountain

Host or associated Host

Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyodacite

Host or associated	Host
Rock type	Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite
Rock unit name	Local Volcaniclastic Sedimentary Rocks
Rock description	Local Volcaniclastic Sedimentary Rocks

Nearby scientific data

(1)	-107.30063, 37.98279	ListMap

Economic information

Geologic structures

Type of structure	Regional
Structure description	San Juan Volcanic Field, San Juan Depression
Type of structure	Local
Structure description	San Juan-Uncompahgre Calderas, Lake City Caldera, Black Crook Fault

Ore body information

Thickness 2.44M

Thickness	2.44M

Controls for ore emplacement

North-Trending Concentric Fault Related To Lake City Caldera Formation

Economic information about the deposit and operations

Development status	Past Producer
Commodity type	Metallic
Deposit size	Small
Significant	No
Year of last production	1953

Mining district

District name	Lake (Lake City) District

Land status

Ownership category	Private

Ownership information

Type Operator

Owner D And D Construction, Inc.

Home office Golden, Co.

First year 1975
Type Owner

Owner Archie Steinbeck

Home office Gunnison, Co.

First year 1975

Type	Operator
Owner	D And D Construction, Inc.
Home office	Golden, Co.
First year	1975

Type	Owner
Owner	Archie Steinbeck
Home office	Gunnison, Co.
First year	1975

Production statistics

Year

1884

Description

Ap_Grade: ^Average 21 Oz/Ton Ag, 3 Oz/Ton Au

Importance	Item	Commodity	Group	Amount recovered	Grade	Recovery percentage
Major	Ore	Gold	Gold		85g/mt
Major	Ore	Silver	Silver		596g/mt

Year

1927

Description

Ap_Grade: ^0.286 Oz/Ton Au, 10.75 Oz/Ton Ag, 20.4 % Pb, 24.85 % Zn

Importance	Item	Commodity	Group	Grade
Major	Ore	Silver	Silver	304g/mt
Major	Ore	Gold	Gold	8g/mt
Trace	Ore	Zinc	Zinc	25wt-pct
Minor	Ore	Lead	Lead	20wt-pct

Comments on the production information

PARTIAL PRODUCTION RECORD. FIGURES UNAVAILABLE FOR OTHER YEARS. MINERAL RESOURCES OF U.S. VOLUMES REPORT MINE PRODUCTION IN 1913, 1919-1921, 1949, 1950 (SMELTER DUMP), AND 1953; PRODUCTION NOT REPORTED SEPARATELY BUT COMBINED WITH THAT OF OTHER LAKE DISTRICT MINES. PRODUCTION IN 1884 CITED BY IRVING AND BANCROFT (FROM U.S. MINE REPORT).

Comments on the workings information

MINE DEVELOPED BY SEVERAL CROSSCUT TUNNELS DRIVEN WEST AND SW FROM SURFACE AND BY DEEP CROSSCUT TUNNEL FROM GOLDEN FLEECE MINE. AT 1950 FT FROM PORTAL OF GOLDEN FLEECE TUNNEL, DE CAMP CROSSCUT DRIVEN N 52 W FOR ABOUT 750 FT, THENCE INTO WEST BRANCH AT N 80 W FOR 510 FT AND INTO NORTH BRANCH AT N 25 W FOR 620 FT. ABOUT 1450 FT OF MAIN DRIFT ON HIWASSEE VEIN DEVELOPED OFF WEST AND NORTH BRANCHES. AT 160 FT NORTH OF WEST BRANCH OF MAIN DRIFT, 100-FT WINZE SUNK TO LOWER WORKINGS, CONSISTING OF 240-FT NORTH-NNE DRIFT. AT 100 FT NORTH OF WEST BRANCH ON MAIN DRIFT, RAISE DRIVEN ABOUT 470 FT ON VEIN TO CONNECTING LEVEL DRIFT OF UPPER WORKINGS. UPPER CROSSCUT DRIVEN GENERALLY N 85 W FOR 480 FT TO VEIN, THENCE AS FIRST LEVEL DRIFT 300 FT TO SOUTH AND 450 FT TO NORTH. AT 40 FT NORTH OF UPPER CROSSCUT ON FIRST DRIFT, MAIN SHAFT SUNK 500 FT, WITH STOPED 360-FT INTERMEDIATE LEVEL DRIFT AT 80 FT; 660-FT SECOND LEVEL DRIFT AT 150 FT; 40-FT THIRD LEVEL DRIFT AT 250 FT; 380-FT FOURTH LEVEL DRIFT AT 340
FT; 30-FT FIFTH LEVEL DRIFT AT 440 FT; 70-FT COMMECTING LEVEL DRIFT AT BOTTOM (500 FT). SHAFT ALSO EXTENDS 180 FT ABOVE FIRST LEVEL TO 90-FT DRIFT DEVELOPED OFF 200-FT CAPEL CROSSCUT, DRIVEN N 83 W FROM SURFACE. FIRST CROSSCUT PORTAL LOCATED 910 FT N 29 W FROM UPPER CROSSCUT PORTAL, DRIVEN GENERALLY SSW FOR 180 FT TO 290-FT FIRST HIWASSEE DRIFT, WHOSE SOUTH END CONNECTED BY SHORT WINZE TO NORTH END OF FIRST LEVEL DRIFT. SECOND CROSSCUT PORTAL, LOCATED 1050 FT N 18 W OF UPPER CROSSCUT PORTAL, DRIVEN GENERALLY SW FOR 375 FT TO 330-FT SECOND HIWASSEE DRIFT, WHOSE SOUTH END CONNECTED BY SHORT WINZE TO NORTH END OF SECOND LEVEL DRIFT. THIRD CROSSCUT PORTAL, LOCATED 1200 FT NORTH OF UPPER CROSSCUT PORTAL, DRIVEN GENERALLY SW FOR 340 FT TO FACE. 120-FT THIRD HIWASSEE DRIFT DEVELOPED OFF WINZE FROM SECOND HIWASSEE DRIFT AT 370 FT FROM CROSSCUT; AT SAME POINT, 200-FT RAISE EXTENDS THROUGH FIRST HIWASSEE DRIFT TO SURFACE.

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	D011554
U.S. Bureau of Mines	Minerals Availability System	MAS	0080530021

Bibliographic references

Deposit

IRVING, J.D., AND BANCROFT, HOWLAND, 1911, GEOLOGY AND ORE DEPOSITS NEAR LAKE CITY, COLORADO: USGS BULL. 478, P. 111-116.
Deposit

LIPMAN, P.W., 1976, GEOLOGIC MAP OF THE LAKE CITY CALDERA AREA, WESTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-962.
Deposit

LIPMAN, P.W., AND OTHERS, 1976, MULTIPLE AGES OF MID-TERTIARY MINERALIZATION AND ALTERATION IN THE WESTERN SAN JUAN MOUNTAINS, COLORADO: ECON. GEOLOGY, V. 71, NO. 3, P. 571-588.
Deposit

SLACK, J.F., 1980, MULTISTAGE VEIN ORES OF THE LAKE CITY DISTRICT, WESTERN SAN JUAN MOUNTAINS, COLORADO: ECON. GEOLOGY, V. 75, NO. 7, P. 963-991.
Deposit

COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.
Deposit

BLM MINERAL SURVEYS MS 8651, 11119, 11235, 11591, 12345, 12680
Production

COLORADO DIV. MINES ANNUAL OPERATOR REPT.; IRVING AND BANCROFT (1911); USBM MINERALS YEARBOOK (1953)

General comments

Subject category	Comment text
Deposit	MINE LOCATED ON EAST RIM OF LAKE CITY CALDERA ON NORTH-SOUTH-TRENDING CONCENTRIC FAULT IN SLACK'S (1980) BARITE/PRECIOUS METALS ASSEMBLAGE, INNER QUARTZ-SPHALERITE ZONE. CALDERA WALL TRUNCATES SEQUENCE OF UNCOMPAHGRE CALDERA MOAT-FILL ROCKS, CONSISTING OF HENSON MBR QUARTZ LATITE, VOLCANICLASTICS (TUFFACEOUS SANDSTONE AND SHALE), AND UNCOMPAHGRE PEAK QUARTZ LATITE, THIS AREA OF LAKE CITY CALDERA FILLED BY RED MOUNTAIN QUARTZ LATITE INTRUDED ALONG RING FRACTURE AND PARTLY OVERLAIN BY GRASSY MOUNTAIN QUARTZ LATITE. PRINCIPAL VEIN IS ILMA VEIN, TRENDING GENERALLY NORTH-SOUTH, BUT WITH LOCAL ANGULAR DEVIATIONS, DIPPING 70 W AT SURFACE, SHALLOWING TO 45 TO 50W, THEN STEEPENING TO 58 W IN LOWEST WORKINGS (IRVING AND BANCROFT, 1911). FOOTWALL FREQUENTLY SEPARATED FROM VEIN BY STRONG SELVAGE LAYER. VEIN BRANCHES FROM HANGING WALL AND IS COMPOSED OF SERIES OF SHEETING PLANES, OFTEN BRECCIATED, AND REPLACED BY ORE AND GANGUE. VEIN OFFSET BY EAST-WEST-TRENDING BLACK CROOK FAULT. MASSIVE,
Deposit	IRREGULAR ORE REPLACES SHEETED ROCK RATHER THAN FILLING OPEN SPACES. ORE CHARACTERIZED BY ABUNDANT SPHALERITE, PYRARGYRITE, AND BY BROWNISH-GREEN, MASSIVE, FINE-GRAINED AURIFEROUS PYRITE KNOWN AS BROWN IRON.

Subject category

Comment text

Deposit

MINE LOCATED ON EAST RIM OF LAKE CITY CALDERA ON NORTH-SOUTH-TRENDING CONCENTRIC FAULT IN SLACK'S (1980) BARITE/PRECIOUS METALS ASSEMBLAGE, INNER QUARTZ-SPHALERITE ZONE. CALDERA WALL TRUNCATES SEQUENCE OF UNCOMPAHGRE CALDERA MOAT-FILL ROCKS, CONSISTING OF HENSON MBR QUARTZ LATITE, VOLCANICLASTICS (TUFFACEOUS SANDSTONE AND SHALE), AND UNCOMPAHGRE PEAK QUARTZ LATITE, THIS AREA OF LAKE CITY CALDERA FILLED BY RED MOUNTAIN QUARTZ LATITE INTRUDED ALONG RING FRACTURE AND PARTLY OVERLAIN BY GRASSY MOUNTAIN QUARTZ LATITE. PRINCIPAL VEIN IS ILMA VEIN, TRENDING GENERALLY NORTH-SOUTH, BUT WITH LOCAL ANGULAR DEVIATIONS, DIPPING 70 W AT SURFACE, SHALLOWING TO 45 TO 50W, THEN STEEPENING TO 58 W IN LOWEST WORKINGS (IRVING AND BANCROFT, 1911). FOOTWALL FREQUENTLY SEPARATED FROM VEIN BY STRONG SELVAGE LAYER. VEIN BRANCHES FROM HANGING WALL AND IS COMPOSED OF SERIES OF SHEETING PLANES, OFTEN BRECCIATED, AND REPLACED BY ORE AND GANGUE. VEIN OFFSET BY EAST-WEST-TRENDING BLACK CROOK FAULT. MASSIVE,

Deposit

IRREGULAR ORE REPLACES SHEETED ROCK RATHER THAN FILLING OPEN SPACES. ORE CHARACTERIZED BY ABUNDANT SPHALERITE, PYRARGYRITE, AND BY BROWNISH-GREEN, MASSIVE, FINE-GRAINED AURIFEROUS PYRITE KNOWN AS BROWN IRON.

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	01-MAR-1984	Schwochow, Stephen D.	Colorado Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

Wikidata: Q49400181 (Black Crook Mine)

Maps centered on this site

Authoritative Colorado resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.