Guajaramirim Au Occurrence

Occurrence in Rondonia, Brazil with commodities Gold, Copper, Lead, Zinc

Sections on this page

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

Geologic information

Identification information

Deposit ID	10068125
MRDS ID	W001052
Record type	Site
Current site name	Guajaramirim Au Occurrence

Geographic coordinates

Geographic coordinates:	-65.39946, -10.54791 (WGS84)

Site location context

Political divisions (FIPS codes)

Rondonia(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country	State
Brazil	Rondonia

Commodities

Commodity	Importance
Gold	Primary
Copper	Primary
Lead	Primary
Zinc Critical	Primary

Comments on the commodity information

SN GRAVELS AVERAGE THICKNESS ABOUT 0.80 CM. AND CUT-OFF GRADE IS 0.5 KILOS PER CU METER

Materials information

Materials	Type of material
Chalcopyrite	Ore
Gold	Ore
Malachite	Ore
Pyrite	Ore

Host and associated rocks

Host or associated Host

Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite

Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

(1)	-65.39946, -10.54791	ListMap

Economic information

Comments on the geologic information

MAJOR.UNITS: GRANITE INTRUDES MUTUM-PARANA FM. ; GEOL.DESC: TIN ASSOCIATED WITH QUARTZ VEINS, GREISEN AND PERACIDITE(SILEXITE). ALL MINING FROM PLACERS ; REG.COM: GRANITES ASSIGNED TO 1300-900 MY PERIOD OF FOLDED CRYSTALLINE ROCKS OF BRAZILIAN SHIELD

Economic information about the deposit and operations

Development status	Occurrence
Commodity type	Metallic
Significant	No

Comments on the production information

CONTENT OF W, TA OR OTHER NOT KNOWN; ESTIMATES 1972 PRODUCTION TO BE ABOUT 5000 TONS CONCENTRATE

Comments on the reserve resource information

CONSERVATIVE EST. BASED ON SIMILARITY GEOL. SETTING AREAS NOT YET CHECKED FOR SN. ENTIRE REGION KNOWN ONLY RECON. SCALE. EST. CONTENT W AND TA UNKNOWN
CONTENT OF W AND TA NOT KNOWN. ESTIMATES INCLUDE ALL CATEGORIES RESOURCES. GENERAL REFERENCE F-L GIVES RESERVES 3 MILLION MET. TONS CONC. WITH 66%TIN
CONTENT OF W, TA NOT KNOWN. RESERVES ARE EST. OF PROVED, PROBABLE AND POSSIBLE TOGETHER. GEN. REF. F-L GIVES RESERVES EST. 3 MILLION TONS CONC.

Comments on the workings information

MINING IN NINE PLACER AREAS, JUNE 1972; ONE DREDGE OPERATING AT SANTA BARARA MINE(JAMARI)

Comments on development

CASSITERITE IDENTIFIED BY CAMPBELL GIVEN HIM BY JOAQUIM P. DA ROCHA FOUND ON HIS LANDS IN DIAMONDIFEROUS GRAVELS AS UNIDENTIFIED MINERAL ; ECON.COM: PLACER MINING IN REMOTE DIFFICULTY ACCESIBLE REGION IN TROPICAL FOREST

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	W001052

Bibliographic references

Deposit

VERBAL COM. 11/2/72 EMILIANO SOUZA, CPRM GEOLOGIST PORTO VELHO

General comments

Subject category	Comment text
Deposit	CIRCULAR OUTCROPS OF TIN BEARING GRANITE 76 OF THESE OUTCROPS EXTEND FROM CENTER OF TIN DISTRICT TO TAPAJOZ AND XINGU RIVERS THEREBY EXPANDING CONSIDERABLY THE HYPOTHETICAL TIN RESOURCES OF THE AMAZON.
Deposit	PLACERS FOUND IN 3 SUBDISTRICTS: CANDEIAS-JAMARI RIVERS(10,000 SQ. KM.); NW RONDONIA(5,000 SQ. KM.); S. OF TABAJARA(7,500 SQ. KM)
Deposit	LOCATION IS ROAD CUT 30 KM. N. GUAJARAMIRIM, REPORTED BY CPRM THIS MINERALIZED QUARTZITE IS EXTENSIVE IN REGION AND BEING DEVELOPED AS GOLD DEPOSIT BY GERMAN COMPANY.
Deposit	First Production Year: 1959 FOR PART, OTHERS 1800'S, 1970, 1987
Deposit	Discovery Year: 1952 FOR PART, OTHER PARTS 1800'S, 1970, 1987

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	01-NOV-1972	White, Max G.	U.S. Geological Survey

Beyond USGS

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