Riscos De Oro

Past Producer in Nicaragua with commodities Gold, Copper

Sections on this page

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

Geologic information

Identification information

Deposit ID	10100564
MRDS ID	W702069
Record type	Site
Current site name	Riscos De Oro

Geographic coordinates

Geographic coordinates:	-84.23325, 14.03422 (WGS84)

Site location context

Political divisions (FIPS codes)

Nicaragua(country)

North America(continent)

Land(continent)

Geographic areas

Country
Nicaragua

Comments on the location information

18 KM NE OF ROSITA. RELATED SITES: GUAPINOL 1.5 KM SE, CALIFORNIA 2 KM ENE, BLAG 6 KM ENE, NUEVO MUNDO TO SW.

Commodities

Commodity	Importance
Gold	Primary
Copper	Primary

Materials information

Materials	Type of material
Gold	Ore
Quartz	Gangue

Host and associated rocks

Host or associated Associated

Rock type Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt
Host or associated Host

Rock type Volcanic Rock (Aphanitic)

Host or associated	Associated
Rock type	Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt

Host or associated	Host
Rock type	Volcanic Rock (Aphanitic)

Nearby scientific data

(1)	-84.23325, 14.03422	ListMap

Economic information

Ore body information

Strike NE

Dip 50-60W (AT GUAPINOL)

Strike	NE
Dip	50-60W (AT GUAPINOL)

Economic information about the deposit and operations

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

Mining district

District name	Rosita

Ownership information

Type Operator

Owner Tonapah Mining Co.

First year 1916

Last year 1917
Type Operator

Owner Rosario

First year 1977

Last year 1979

Type	Operator
Owner	Tonapah Mining Co.
First year	1916
Last year	1917

Type	Operator
Owner	Rosario
First year	1977
Last year	1979

Reserves and resources

Type In-situ

Estimate year 1984

Commodity Subtype Grade units Group Importance Year

Gold Au 6.296 g/mt Gold Major 1984
Type In-situ

Estimate year 1984

Commodity Subtype Grade units Group Importance Year

Gold Au 3.416 g/mt Gold Major 1984

Comments on the reserve resource information

ORE (1) RISCOS DE ORO; ORE (2) BLAG.

Comments on the workings information

WORKED BY TONAPAH MINING COMPANY 1916-1917 (?); SOIL GEOCHEMISTRY AND VLF-EM BY ROSARIO 1975-1976; WORKED BY ROSARIO 1977-1979 FOR AU APPROXIMATELY 350 T/DAY AT 0.15 OZ/ST (INCLUDING LA LUNA).

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	W702069

Bibliographic references

Deposit

INSTITUTO CENTROAMERICANO DE INVESTIGACION Y TECNOLOGIA INDUSTRIAL (ICAITI), 1970, MAPA METRALOGENETIO DE AMERICA CENTRAL; 1:2000000 & ESTUDIOS METALOGENETICOS DE AMERICA CENTRAL: PUBLICIONES GEOLOGICAS DEL ICAITI NUMERO III, 76 P.
Deposit

MIDDLETON, R.S., AND CAMPBELL, E.E., 1979, GOEPHYSICAL AND GEOCHEMICAL METHODS FOR MAPPING GOLD-BEARING STRUCTURES IN NICARAGUA; IN HOOD, P.J., ED., GEOPHYSICS AND GEOCHEMISTRY IN THE SEARCH FOR METALLIC ORES: GEOLOCICAL SURVEY OF CANADA, ECONOMIC GEOLOGY REPORT 31, P. 779-798.

General comments

Subject category	Comment text
Deposit	VEIN INTERSECTIONS IN DRILL CORE 1.5-2 M, 0.2 OZ/T AU, 1.2 OZ/T AG.

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	01-JUN-1990	Bliss, James D.	U.S. Geological Survey
Updater	01-JUL-1992	Venable, Margaret	U.S. Geological Survey

Beyond USGS

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