Calera Vein, Orcopampa

Producer in Arequipa, Peru with commodities Silver, Gold, Copper

Sections on this page

Identification information
Geographic coordinates
Site location context
Geographic areas
Commodities
Materials information
Alteration
Host and associated rocks
Nearby scientific data
Ore body information
Economic information about the deposit and operations
Mining district
Ownership information
Production statistics
Links to other databases
Bibliographic references
General comments
Reporter information

Geologic information

Identification information

Deposit ID	10079731
MRDS ID	W029833
Record type	Site
Current site name	Calera Vein, Orcopampa
Alternate or previous names	Orcopampa, Alberto Tunnel, Veins: Santiago North, South Rosa Tudela,, Manto Vein, Ramal 1,2,3,4, Ramal Miriam, Laura, Rayo, Santiago Mayor, Santiago, Santa Rosa

Geographic coordinates

Geographic coordinates:	-72.33295, -15.09775 (WGS84)
Elevation	3970
Relative position	150 KM NW OF AREQUIPA.

Site location context

Political divisions (FIPS codes)

Arequipa(province)

Peru(country)

South America(continent)

Land(continent)

Geographic areas

Country	State
Peru	Arequipa

Comments on the location information

RECORD ONLY FOR CALERA VEIN.

Commodities

Commodity	Importance
Silver	Primary
Gold	Primary
Copper	Secondary

Materials information

Materials	Type of material
Acanthite	Ore
Bornite	Ore
Boulangerite	Ore
Calaverite	Ore
Chalcopyrite	Ore
Coloradoite	Ore
Electrum	Ore
Enargite	Ore
Famatinite	Ore
Galena	Ore
Gold	Ore
Hessite	Ore
Marcasite	Ore
Miargyrite	Ore
Polybasite	Ore
Pyrargyrite	Ore
Silver	Ore
Sphalerite	Ore
Stephanite	Ore
Stibnite	Ore
Barite	Gangue
Calcite	Gangue
Gypsum	Gangue
Hematite	Gangue
Kaolinite	Gangue
Quartz	Gangue
Rhodochrosite	Gangue
Rhodonite	Gangue
Sericite	Gangue
Pyrite	Unknown

Alteration

(Local) Potassic (Adularia, Sericite).

Analytical data

Result	AG, AU, CU, PB, ZN, AS, SB, MN, FE, DATA FOR CALERA VEIN IN GIBSON AND OTHERS (1990). GOLD AND AG VALUES SHOWN IN RESERVE BLOCKS IN PETERSEN AND OTHERS (1990). ANALYSES OF HIGH GRADE SAMPLES AND MONTHLY COMPOSITE MILLHEADS (GIBSON AND OTHERS, 1993). AND METAL CONTOURS OF AG AND AU.

Host and associated rocks

Host or associated Associated

Rock type Volcanic Rock (Aphanitic)

Stratigraphic age (youngest) Miocene

Stratigraphic age (youngest) Miocene

Host or associated

Associated

Rock type

Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite

Rock unit name

Sarpane Complex

Rock description

Sarpane Complex

Stratigraphic age (youngest)	Miocene
Chronological age	17.75

Host or associated Associated

Rock type Plutonic Rock

Host or associated	Associated
Rock type	Plutonic Rock

Host or associated

Host

Rock type

Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite

Rock unit name

Manto Tuff;Santa Rosa Formation

Rock description

Manto Tuff;Santa Rosa Formation

Stratigraphic age (youngest)	Miocene
Chronological age	19.5

Nearby scientific data

(1)	-72.33295, -15.09775	ListMap

Economic information

Ore body information

Strike N75E

Dip 50-70NW

Thickness 6.5M

Length 960M

Width 118M

Depth to top 170M

Strike	N75E
Dip	50-70NW
Thickness	6.5M
Length	960M
Width	118M
Depth to top	170M

Economic information about the deposit and operations

Development status	Producer
Commodity type	Metallic
Significant	No
Discoverer	Mario Santillan
Year of first production	1779

Mining district

District name	Orcopampa District

Ownership information

Type Operator

Owner Sindicato Minero De Orcopampa

First year 1910
Type Operator

Owner Compania De Minas Buenaventura S. A.

First year 1960
Type Operator

Owner Compania De Minas Orcopampa, S. A., A Subsidary Of Buenaventura

First year 1970

Type	Operator
Owner	Sindicato Minero De Orcopampa
First year	1910

Type	Operator
Owner	Compania De Minas Buenaventura S. A.
First year	1960

Type	Operator
Owner	Compania De Minas Orcopampa, S. A., A Subsidary Of Buenaventura
First year	1970

Production statistics

Year

1993

Period

1987-1993

Material

Accuracy

Estimate

Description

Cp_Grade: ^0.11 Oz/St Au, 15.0 Oz/St Ag

Importance	Item	Commodity	Group	Amount recovered	Grade	Recovery percentage
Minor		Silver	Silver		424g/mt
Minor		Gold	Gold		3g/mt

Year

1993

Period

To 1993

Material

ORE

Accuracy

Estimate

Description

Cp_Grade: ^0.09 Oz/St Au, 13.9 Oz/St Ag

Importance	Item	Commodity	Group	Amount recovered	Grade	Recovery percentage
Minor	Ore	Silver	Silver		393g/mt
Minor	Ore	Gold	Gold		3g/mt

Comments on the production information

1993 DATA UP TO JAN. 1993. ORE = TOTAL DISTRICT PRODUCTION TO JAN. 1993. ORE (C) = CALERA MAIN SHOOT TO JAN. 1993.

Comments on the reserve resource information

EXPLORATION IN EARLY 1993 FOUND 47,000 MT OF 19.1 OZ/MT AG AND 0.052 OZ/MT AU ON 3.800 AND 3750 LEVELS OF CALERA VEIN IN THE NORTHERN SHAFT AREA. 1986 RESERVES FOR CALERA VEIN (BONANZA).
NUMBERS REPRESENT PRODUCTION PLUS RESERVES IN CALERA VEIN. GIBSON AND OTHERS (1993) SHOW RESERVES 1981, 1984, 1988, AND 1992.

Comments on the workings information

AT LEAST 6 LEVELS BETWEEN 4100 AND 3800.

Comments on development

DISCOVERED BY DRILLING. FULL CAPACITY EXPECTED 1972: 10,000 TO 100,000 MET TPY. ORCOPAMPA DISTRICT WORKED INTERMITTENTLY SINCE SPANISH COLONIAL PERIOD; ABANDONED IN 1842 BECAUSE OF FLOODING; CLAIMED BY DON MATEO MONAN IN 1879 AND BY 1910 DON OSCAR HEEREM OBTAINED CLAIMS AND FORMED THE SINDICATO WHICH ATTEMPTED TO DRAIN MINE. PRE-EARLY 1980'S DISTRICT PRODUCTION AT 500 T/D SILVER ORE; IN EARLY 1980'S AFTER DISCOVERY OF CALERA VEIN CONC. CAPACITY INCREASED TO 1200 T/D.

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	W029833

Bibliographic references

Deposit

INTERNAT. DIR. OF MINING AND MINERAL PROCES. OPERAT. 1977
Deposit

BELLIDO BRAVO,E. AND DE MONTREUIL D., L., 1972, ASPECTOS GENERALES DE LA METALOGENIA DEL PERU, P.78, ED. MINISTERIO DE ENERGIA Y MINAS, SERVICIO DE GEOLOGIA Y MINERIA
Deposit

GIBSON, P.C., NOBLE, D.C., AND L.T. LARSON, 1990, MULTISTAGE EVOLUTION OF THE CALERA EPITHERMAL AG-AU VEIN SYSTEM, ORCOPAMPA DISTRICT, SOUTHERN PERU: FIRST RESULTS: ECONOMIC GEOLOGY, V. 85, P. 1504-1519.
Deposit

PETERSEN, E.U., PETERSEN, U., AND HACKBARTH, C.J., 1990, ORE ZONING AND TETRAHEDRITE COMPOSITIONAL VARIATION AT ORCOPAMPA, PERU: ECONOMIC GEOLOGY, V. 85, P. 1491-1503.
Deposit

U.S. EMBASSY LIMA, 1993, 1992 INSUSTRIAL OUTLOOK REPORT ON MINERALS IN PERU: U.S. DEPARTMENT OF STATE, 7/93.
Deposit

NOBLE, D.C. AND VIDAL, C.E., 1994, GOLD IN PERU: SEG NEWSLETTER, APRIL 1994, NO. 17, P. 1, 6-13.
Deposit

GIBSON, P.G., NOBLE, D.C., BENAVIDES G., R.B., AND MAYTA, T., 1993, DISCOVERY, DEVELOPMENT, AND PRODUCTION OF A BLIND AG-AU BONANZA IN THE CALERA VEIN, ORCOPAMPA DISTRICT, PERU: INTERNATIONAL GEOLOGIC REVIEW V. 35, P. 780-796.
Production

GIBSON AND OTHERS (1990); U.S. EMBASSY LIMA (1993); GIBSON AND OTHERS (1993)
Reserve-Resource

GIBSON AND OTHERS (1990), GIBSON AND OTHERS (1993).

General comments

Subject category	Comment text
Deposit	CALERA VEIN HAS FOUR MAJOR SPLITS IN FOOTWALL: RAMAL 1,2,3,AND 4. MOST ORE IN CALERA VEIN OCCURS IN ONE ORE SHOOT 200-500 M LENGTH, 150-325 M WIDTH. AVERAGES 6M ORE SHOOTS ALSO OCCUR IN FOOTWALL SPLITS.

Reporter information

Type	Date	Name	Affiliation
Reporter	01-AUG-1978	Theune, C.T.	U.S. Geological Survey
Updater	01-NOV-1993	Page, Norman J.	U.S. Geological Survey
Updater	01-MAY-1994	Page, Norman J.	U.S. Geological Survey
Updater	05-AUG-1994	Page, Norman J.	U.S. Geological Survey

Beyond USGS

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

Calera Vein, Orcopampa

Geologic information

Identification information

Geographic coordinates

Site location context

Geographic areas

Comments on the location information

Commodities

Materials information

Alteration

Analytical data

Host and associated rocks

Nearby scientific data

Economic information

Ore body information

Economic information about the deposit and operations

Mining district

Ownership information

Production statistics

Comments on the production information

Comments on the reserve resource information

Comments on the workings information

Comments on development

Reference information

Links to other databases

Bibliographic references

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Production

Reserve-Resource

General comments

Reporter information

Beyond USGS

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