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Brumadinho

Past Producer in Minas Gerais, Brazil with commodity Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10105317
MRDS ID TC39253
Record type Site
Current site name Brumadinho

Geographic coordinates

Geographic coordinates: -43.44005, -20.04637 (WGS84)
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Minas Gerais(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Brazil Minas Gerais

Comments on the location information

  • LOCATION OF LATITUDE/LONGITUDE IS AT THE TOWN OF KOETONG; FIELD INCLUDES OPERATIONS WITHIN A RADIUS OF 6 MI OF THE TOWN; PRINCIPAL PLACERING AREAS WERE ALONG KOETONG CREEK (RUNNING CREEK), MOUNTAIN AND BURROWYE CREEKS, ROYAL PARK CREEK, DRY FOREST CREEK, BOUNDARY CREEK; PLIOCENE TERRACES ALONG ROYAL PARK CREEK AND DRY FOREST WERE ALSO WORKED.

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • CLASTIC ROCKS TEND TO BE WELL ROUNDED. CASSITERITE MOST COMMONLY PALE GREY; ON DRY FOREST CREEK, TIN IN RECENT ALLUVIUM WAS ROUNDED AND FINE WHERE MUCH OF THE LATTER WAS LOST; ONLY A VERY SMALL AMOUNT OF GOLD IS PRESENT BUT IS PERSISTENT.

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Chlorite Gangue
Limonite Gangue
Quartz Gangue
Tremolite Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Iron Formation
    Rock unit name Moeda And Batatal Formation, Caraca Group, Minas Series;Moeda And Batatal Formation, Caraca Group, Minas Series;Moeda And Batatal Formation, Caraca Group, Minas Series
    Rock description Moeda And Batatal Formation, Caraca Group, Minas Series;Moeda And Batatal Formation, Caraca Group, Minas Series;Moeda And Batatal Formation, Caraca Group, Minas Series

Nearby scientific data

(1) -43.44005, -20.04637
ListMap

Economic information

Ore body information

  • Thickness 20M
    Length 1000M

Comments on the geologic information

  • RECENT DEPOSITS HAVE OVERBURDENS COMMONLY OF SILT AND BLACK CLAY BUT SOMETIMES SANDY WITH MINOR DISSEMINATED TIN. TIN BEARING GRAVELS LOCATED IN MODERN STREAMS, AND TERRACES; ALLUVIAL FLATS ARE NARROW; ONE POSSIBLE BEDROCK SOURCE OF TIN ARE SCATTERED AREAS OF QUARTZ VEINS WITH WOLFRAM, SCHEELITE, CASSITERITE, AND GOLD; IN A FEW CASES, THESE LODES WERE WORK FOR TUNGSTEN; BEDROCK IS GRANITE SINCE THE FIELD IS NEAR THE CENTER OF LARGE ELLIPTICAL GRANITE BATHOLITH WHICH MEASURES ABOUT 16 MI ON A EW AXIS AND 24 MI ON A NS AXIS; THE GRANITE IS LOCALLY PORPHYRITIC, SCATTERED QUARTZ VEINS ARE NOTED; THIS SO-CALLED KOETONG BATHOLITH IS LIKELY PART OF AN EXTENSIVE BATHOLITH WHICH INCLUDES THE CORRYONG GRANITE TO THE E AND GRANITES OF THE MT PLEASANT RANGE N OF MURRAY RIVER IN NEW SOUTH WALES.

Economic information about the deposit and operations

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

Mining district

District name Alegria District

Comments on the workings information

  • MINES WERE SHALLOW SURFACE OPERATIONS SINCE MOST TIN GRAVELS WERE SHALLOW (NO MORE THAN 10 FT)

Comments on development

  • THE FIRST PHASE OF PRODUCTION WAS FROM 1872 TO 1875 WHEN MOST OF THE IMPORTANT TIN GRAVELS WERE LOCATED; A SEVERE DROP IN TIN PRICES ESSENTIAL CLOSED THE FIELD IN 1875 WHICH CAUSED MINERS TO PROSPECT FOR GOLD; MINING BEGAN AGAIN IN 1880; SOME ORE WAS SMELTED LOCALLY AT TALLANGATTA; LODES WERE ACTIVITY EXPLOITED IN THE EARLY 1880'S INCLUDING THE WALWA, JINGELLIC AND MT. ALFRED TIN VEINS; AFTER 1885, TIN PRICES FELL AGAIN AND THE FIELD NEVER AGAIN WAS A LARGE TIN PRODUCER; MINING METHODS USED INCLUDED SAND PUMP, MONITOR AND GRAVITATIONAL SLUICING; DIFFICULTY IN SEPARATION OF ILMENITE FROM TIN CAUSED TIN PRODUCTION PROBLEMS AS DID THE LACK OF DEPENDABLE WATER SUPPLY; THE MINES DEPT NOTED THE FIELD WAS BEST SUITED FOR PRODUCTION BY SMALL PARTIES AND NOT BY COMPANIES.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit MODELING NOTES: REPORTED TIN CONCENTRATES PRODUCED IN THE FIELD IS ABOUT 189 TONS; THIS IS ABOUT 120 MT OF TIN METAL; USING THE 1914 PRODUCTION DATA FROM THE BORDER CO. OF 15,007 CY WITH 4 TONS OF TIN CONCENTRATE, THE ESTIMATED TIN GRADE IS 0.22 KG PER CM. THIS GRADE AND THE TOTAL TIN PRODUCED SUGGESTS THAT THE TOTAL VOLUME WORKED IS 540,000 CM; REMAINING UNWORKED ALLUVIUM IS SMALL AND NO SIGNIFICANT RESERVES ARE LIKELY.
Deposit PRINCIPAL PLACER DEPOSITS ARE FOUND ALONG KOETONG CREEK WHERE DEPOSITS OCCUR IN NARROW ALLUVIAL FLATS; IN MODERN ALLUVIUM (NO THICKER THAN 10 FT), TIN GRAVELS WERE IN PATCHES ON BEDROCK WITH THICKNESS OF 3 FT OR LESS; PAYABLE WASH IN THE EXCELSOR OPERATION 1.5 TO 2.5 MI S OF KOETONG TOWNSHIP INCLUDED A PAY HORIZON OF ONE CHAIN IN WIDTH (66 OR 100 FT) IN TERRACE WITH 0-4.5 FT RED GRANITIC SOIL, 4.5-7 FT GRANITE DETRITUS, 7-8.25 FT GREY COLORED ORE GRAVEL WITH "TIN ORE ON FLOOR," AND AT 8.25 GRANITE BEDROCK; AT THE ANNANDALE SYNDICATE PROPERTY, THE PLIOCENE TERRACE DEPOSIT WAS NEAR A DRAINAGE DIVIDE; ABOUT 2 MI OF TIN GRAVEL WAS IN THE UPPER PART OF MOUNTAIN CREEK N OF SHELLEY TOWNSHIP; ABOUT 0.5 MI PLIOCENE HIGH TERRACES WITH TIN GRAVELS ALONG TRIBUTARY OF DRY FOREST CREEK; UPPER 0.5 MI OF TIN GRAVEL IN ROYAL PARK CREEK; TIN GRAVELS OCCURRED (ABOUT 1 CHAIN WIDE) ALONG A NARROW CHANNEL WITHIN AN ALLUVIAL PLAIN FOR A DISTANCE OF 0.5 MI ON LOWER KOETONG CREEK (7-8 MI NW KOETONG
Deposit TOWNSHIP).

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-93 Page, Norman J. U.S. Geological Survey

Beyond USGS

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

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