Standard

Occurrence in Inyo county in California, United States with commodities Lead, Copper, Silver

Geologic information

Identification information

Deposit ID	10033997
MRDS ID	M020665
Record type	Site
Current site name	Standard
Alternate or previous names	Ruona

Geographic coordinates

Geographic coordinates:	-117.5909, 36.28025 (WGS84)
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Geographic areas

Country	State	County
United States	California	Inyo

Public Land Survey System information

Meridian	Township	Range	Section	Fraction	State
Mount Diablo	019S;019S	040E;041E	13;18		California

Commodities

Commodity	Importance
Lead	Tertiary
Copper	Tertiary
Silver	Tertiary

Materials information

Materials	Type of material
Chalcopyrite	Ore
Pyrite	Ore
Calcite	Gangue
Fluorite	Gangue
Jasper	Gangue
Quartz	Gangue

Host and associated rocks

Host or associated Host

Rock type Metamorphic Rock > Hornfels

Host or associated	Host
Rock type	Metamorphic Rock > Hornfels

Nearby scientific data

(1)	-117.5909, 36.28025	ListMap

Geologic structures

Type of structure	Local
Structure description	Faults, Folds

Ore body information

Strike N 50 - 75 E

Dip 70 NW

Thickness 1.22M

Strike	N 50 - 75 E
Dip	70 NW
Thickness	1.22M

Comments on the geologic information

GEOL.DESC: WORKINGS ARE MAINLY IN CALC-HORNFELS OF KEELER CANYON FORMATION, LOCALLY WITHIN GRANITIC ROCKS, BEDDING STRIKES NORTH, DIPS WESTERLY EXCEPT FOR MINOR FOLDS. TWO VERTICAL BRANCHES OF A N 60 - 80 W TRENDING FAULT ZONE NEAR OLD CAMPSITE. THESE FAULTS ARE MARKED BY 10 - 40 FT. THICK GOUGE ZONES.

Economic information

Economic information about the deposit and operations

Development status	Occurrence
Commodity type	Metallic
Significant	No

Mining district

District name	Darwin

Comments on the workings information

"STANDARD VEIN"; 70 FT. VERTICAL SHAFT, ADITS 100 AND 200 FT. LONG, EXTENSIVE SURFACE WORKINGS "STANDARD EXTENSION"; 3 SHAFTS ABOUT 100 FT. DEEP, TWO ADITS, DRIFTS AND MINOR SURFACE WORKINGS "UNNAMED VEIN"; EXPLORED BY NE TRENDING ADIT, ALSO SURFACE WORKINGS.

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	M020665

Bibliographic references

Deposit

HALL, W. E. AND MACKEVETT, E. M., 1958 , ECONOMIC GEOLOGY OF THE DARWIN QUAD, INYO COUNTY, CALIF.; DIV. OF MINES, SPECIAL REPORT 51, P. 40

General comments

Subject category	Comment text
Deposit	MOST IMPORTANT VEINS ARE THE "STANDARD VEIN" EXPOSED FOR ABOUT 1,000 FT, CONTAINS POCKETS OF "GALENA, CERUSSITE, PYRITE, CHRYSOCOLLA AND ANGLESITE. "STANDARD EXTENSION" CROPS OUT FOR 600 FT., ITS 600 FT. SOUTH OF "STANDARD", STRIKES N 60 - 70 E, DIPS 75 NW TO VERTICAL, AVERAGES 2 FT. IN THICKNESS, COMPOSED OF COURSE CALCITE, QUARTZ, JASPER AND LIMONITE, LESSER AMOUNTS OF GALENA, CERUSSITE, HEMIMORPHITE AND CHRYSOCOLLA. UNNAMED VEIN, AVERAGES 2 FT. THICK, STRIKES N 60 E, DIPS 75 NW, SIMILAR TO "STANDARD" IN MINERAL CONTENT. POSSIBLY FAULTED SEGMENT OF "STANDARD VEIN".
Deposit	SMALL QUANTITIES OF ORE MINERALS ARE LOCALLY DISTRIBUTED ON STEEP MINOR SUBSIDIARY FAULTS, STRIKE BETWEEN N 25 W AND N 25 E. PART OF RUONA GROUP.

Subject category

Comment text

Deposit

MOST IMPORTANT VEINS ARE THE "STANDARD VEIN" EXPOSED FOR ABOUT 1,000 FT, CONTAINS POCKETS OF "GALENA, CERUSSITE, PYRITE, CHRYSOCOLLA AND ANGLESITE. "STANDARD EXTENSION" CROPS OUT FOR 600 FT., ITS 600 FT. SOUTH OF "STANDARD", STRIKES N 60 - 70 E, DIPS 75 NW TO VERTICAL, AVERAGES 2 FT. IN THICKNESS, COMPOSED OF COURSE CALCITE, QUARTZ, JASPER AND LIMONITE, LESSER AMOUNTS OF GALENA, CERUSSITE, HEMIMORPHITE AND CHRYSOCOLLA. UNNAMED VEIN, AVERAGES 2 FT. THICK, STRIKES N 60 E, DIPS 75 NW, SIMILAR TO "STANDARD" IN MINERAL CONTENT. POSSIBLY FAULTED SEGMENT OF "STANDARD VEIN".

Deposit

SMALL QUANTITIES OF ORE MINERALS ARE LOCALLY DISTRIBUTED ON STEEP MINOR SUBSIDIARY FAULTS, STRIKE BETWEEN N 25 W AND N 25 E. PART OF RUONA GROUP.

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	01-AUG-1978	Fraticelli, L. A. (Albers, J.)	U.S. Geological Survey