Narrow Gauge Mine

Past Producer in Rio Grande county in Colorado, United States with commodities Gold, Silver, Copper

Sections on this page

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

Geologic information

Identification information

Deposit ID	10014042
MRDS ID	D010658
MAS/MILS ID	0081050023
Record type	Site
Current site name	Narrow Gauge Mine
Alternate or previous names	Narrow Gage shaft

Geographic coordinates

Point of reference	Main Entrance
Geographic coordinates:	-106.5956, 37.42419 (WGS84)
Elevation	3559
Location accuracy	10(meters)
Relative position	0.43 MILES S 18 W FROM SUMMITVILLE, 10 m. Adit on topo close to pl. 3 of PP-343.

Site location context

Political divisions (FIPS codes)

Rio Grande(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Summitville(quadrangle 1:24,000 scale)

Antonito(quadrangle 1:100,000 scale)

Durango(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alamosa-Trinchera(hydrologic unit)

Rio Grande Headwaters(hydrologic accounting unit)

Rio Grande Headwaters(hydrologic subregion)

Rio Grande(hydrologic region)

Federal lands

Rio Grande National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country	State	County
United States	Colorado	Rio Grande

Public Land Survey System information

Meridian	Township	Range	Section	Fraction	State
New Mexico	037N	004E	30	NE OF SW	Colorado

Comments on the location information

ON NE SIDE OF SOUTH MTN 540 FT NE OF COPPER HILL MINE. PORTAL ELEV FROM STEVEN AND RATTE (1960, PL. 4). ; INFO FROM LAND.ST :1975

Commodities

Commodity	Importance
Gold	Primary
Silver	Primary
Copper	Secondary

Alteration

(Local) Quartz-Alunite Solfataric Alteration

Host and associated rocks

Host or associated

Associated

Rock type

Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite

Rock unit name

Quartz Latite Of South Mountain;Summitville Andesite

Rock description

Quartz Latite Of South Mountain;Summitville Andesite

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

Host or associated Associated

Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Host or associated	Associated
Rock type	Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Host or associated	Host
Rock type	Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite
Rock unit name	Quartz Latite Of South Mountain;Summitville Andesite
Rock description	Quartz Latite Of South Mountain;Summitville Andesite

Nearby scientific data

Main Entrance (1)	-106.5956, 37.42419	ListMap

Economic information

Geologic structures

Type of structure	Regional
Structure description	San Juan Volcanic Field
Type of structure	Local
Structure description	Platoro Caldera, Summitville Caldera, Summitville Fault, South Mountain Dome

Controls for ore emplacement

Quartz-Alunite Solfataric Replacement Bodies Following Nw-Trending Fractures Near Sw Margin Of South Mountain Feeder Conduit

Economic information about the deposit and operations

Operation type	Underground
Development status	Past Producer
Commodity type	Metallic
Deposit size	Small
Significant	No

Mining district

District name	Summit (Summitville) District

Land status

Ownership category	Private

Ownership information

Type Owner

Owner General Minerals Corp.

Year 1983

Type	Owner
Owner	General Minerals Corp.
Year	1983

Workings at the site

Type of workings Underground

Length 1283.21M

Type of workings	Underground
Length	1283.21M

Comments on the workings information

MAIN CROSSCUT TUNNEL DRIVEN S 55 W FOR 1050 FT THROUGH COPPER HILL-ESMOND VEIN ZONE TO HIDDEN VEIN ZONE. 50-FT DRIFT DRIVEN SOUTH ON OUNCE VEIN AT 300 FT FROM PORTAL. 690-FT DRIFT DRIVEN NW-SE AT 590 FT FROM PORTAL. 600-FT MAIN DRIFT ON COPPER HILL-ESMOND VEIN DRIVEN NW AT 710 FT FROM PORTAL AND 180-FT DRIFT DRIVEN SE AT 870 FT FROM PORTAL. 680-FT DRIFT DRIVEN AT END OF TUNNEL ON HIDDEN VEIN WITH 220-FT CROSSCUT TO BLACK WONDER (EXTENSION) VEIN DRIVEN AT 70 FT SE OF MAIN CROSSCUT. 520-FT SUBLEVEL DRIFT 104 FT BELOW MAIN DRIFT. 120-FT MCAFEE WINZE SUNK FROM 104 SUBLEVEL. OTHER UNDETERMINED RAISES AND WINZES BETWEEN 104 SUBLEVEL AND NARROW GAUGE LEVEL AND BETWEEN NARROW GAUGE AND COPPER HILL LEVELS. MAJOR STOPES ABOVE NARROW GAUGE LEVEL AND ABOVE 104 SUBLEVEL.

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	D010658
U.S. Bureau of Mines	Minerals Availability System	MAS	0081050023

Bibliographic references

Deposit

PATTON, H.B., 1917, GEOLOGY AND ORE DEPOSITS OF THE PLATORO-SUMMITVILLE MINING DISTRICT, COLORADO: CGS BULL. 13.
Deposit

STEVEN, T.A., AND RATTE, J.C., 1960, GEOLOGY AND ORE DEPOSITS OF THE SUMMITVILLE DISTRICT, SAN JUAN MOUNTAINS, COLORADO: USGS PROF. PAPER 343, pl. 3.
Deposit

LIPMAN, P.W., 1974, GEOLOGIC MAP OF THE PLATORO CALDERA AREA, SOUTHEASTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-828.

General comments

Subject category	Comment text
Deposit	MINE IS DEVELOPED MOSTLY ON HIDDEN VEIN ZONE AND TO LESSER EXTENT ON COPPER HILL-ESMOND VEIN ZONE. HIDDEN VEIN ZONE IS NARROW, OBSCURED, HIGHLY SILICIFIED AND MINERALIZED ZONE TRENDING N 40 TO 60 W AND CONTAINING CONTINUOUS TABULAR MASS OF VUGGY QUARTZ ROCK IN QUARTZ-ALUNITE ZONE FLANKED BY HIGHLY ARGILLIZED ROCK. ON VEIN TREND TO SE ARE SEVERAL SMALL PIPELIKE MASSES OF HIGHLY SILICIFIED ROCK LIKEWISE SURROUNDED BY ARGILLIZED ENVELOPES AND PROBABLY MARKING LOCAL UPWARD PROJECTIONS OF MORE CONTINUOUS VEIN ZONE AT DEPTH. ON NARROW GAUGE AND 104 SUBLEVEL, VEIN ZONE CONSISTS OF MANY IRREGULAR, DISCONTINUOUS, AND OVERLAPPING MASSES. ENTIRE ZONE DIPS ABOUT 85 SW.
Deposit	Conflicting land status. One record says NF, the other says Private.

Subject category

Comment text

Deposit

MINE IS DEVELOPED MOSTLY ON HIDDEN VEIN ZONE AND TO LESSER EXTENT ON COPPER HILL-ESMOND VEIN ZONE. HIDDEN VEIN ZONE IS NARROW, OBSCURED, HIGHLY SILICIFIED AND MINERALIZED ZONE TRENDING N 40 TO 60 W AND CONTAINING CONTINUOUS TABULAR MASS OF VUGGY QUARTZ ROCK IN QUARTZ-ALUNITE ZONE FLANKED BY HIGHLY ARGILLIZED ROCK. ON VEIN TREND TO SE ARE SEVERAL SMALL PIPELIKE MASSES OF HIGHLY SILICIFIED ROCK LIKEWISE SURROUNDED BY ARGILLIZED ENVELOPES AND PROBABLY MARKING LOCAL UPWARD PROJECTIONS OF MORE CONTINUOUS VEIN ZONE AT DEPTH. ON NARROW GAUGE AND 104 SUBLEVEL, VEIN ZONE CONSISTS OF MANY IRREGULAR, DISCONTINUOUS, AND OVERLAPPING MASSES. ENTIRE ZONE DIPS ABOUT 85 SW.

Deposit

Conflicting land status. One record says NF, the other says Private.

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	01-JUN-83	Schwochow, Stephen D.	Colorado Geological Survey
Reporter	17-NOV-83	Intermountain Field Operations Center (IFOC)	U.S. Bureau of Mines	MAS 0081050023
Editor	25-JUL-08	Wilson, Anna B.	U.S. Geological Survey	merged records and deleted 10191201

Beyond USGS

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

External references

Wikidata: Q49435217 (Narrow Gauge Shaft 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.