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Yubdo

Producer in Welega [Walaga], Ethiopia with commodities Platinum, Gold, Palladium, Iridium, Osmium
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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. Nearby scientific data
  8. Ore body information
  9. Controls for ore emplacement
  10. Economic information about the deposit and operations
  11. Mining district
  12. Ownership information
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10106888
MRDS ID M046196
Record type Site
Current site name Yubdo
Alternate or previous names Birbir, Soddo

Geographic coordinates

Geographic coordinates: 35.43845, 8.94579 (WGS84)
Elevation 1600
Relative position RIGHT BANK OF BIRBIR A TRIBUTARY OF THE NILE, NEAR DEMBIDOLO (80 MILES AWAY), 340 MILES W. OF ADDIS-ABABA

Site location context

Political divisions (FIPS codes)

Welega [Walaga](province)

Ethiopia(country)

Africa(continent)

Land(continent)

Geographic areas

Country State
Ethiopia Welega [Walaga]

Commodities

Commodity Importance
Platinum Critical Primary
Gold Secondary
Palladium Critical Secondary
Iridium Critical Secondary
Osmium Secondary

Comments on the commodity information

  • SPERRYLITE OCCURS IN MAGNETITE AND CHROMITE, INTERGRANULAR TO OLIVINES - BUT NONE IN OLIVINE IN DUNITE IN BIRBIRITE OCCURS IN CHROMITE OR ITS ALTERATION PRODUCTS, RARELY IN QUARTZ, AND DIFFUSE MASSES IN LIMONITE, IN PYROXENITE IN MAGNETITE AND IN SILICATES; PT - FE ALLOY OCCURS IN SOILS; NUGGET SIZE 5 MM DIAMETER, WEIGHT 5 GR (ANGULAR). SO DO AUGUSTITHIS'S OTHER MINERAL PHASES

Materials information

Materials Type of material
Chromite Ore
Magnetite Ore
Sperrylite Ore
Chalcedony Gangue
Hematite Gangue
Ilmenite Gangue
Limonite Gangue
Magnesite Gangue
Olivine Gangue
Quartz Gangue
Serpentine Gangue

Analytical data

Result AUGUSTITHIS (1965) GIVES ANALYSES OF PT - FE ALLOY, SPERRYLITE BY X - RAY
Result DUNITE CONTAINS GENERALLY LESS THAN 0.00146 TOZ/ST (0.05 G/TON) WITH CONCENTRATION FACTOR OF 2.4 (BASED ON CRZ03) = 0.0035 TOZ/ST IN BIRBIRITES (MOLLY, 1959)

Nearby scientific data

(1) 35.43845, 8.94579
ListMap

Economic information

Ore body information

  • General form SURFACE COVERING
    Thickness 10M
    Length 6000M
    Width 2000M

Controls for ore emplacement

  • Sperrylite Containing Dunite And Pyroxenite

Comments on the geologic information

  • GEOL.DESC: MOST OF THE DESCRIPTIVE MATERIAL IN THIS RECORD REFERS TO ELUVIUM - ALLUVIAL PLACERS FOLLOW: A. ALLUVIAL GRAVELS ON ALFE, YUBDO, KOPE B. ALLUVIAL GRAVELS IN COURSE OF BIRBIR RIVER C. ALLUVIAL GRAVELS IN TERRACES AND ANCIENT BEDS OF BIRBIR RIVER. 1. KOPE GRAVELS 1 KM LONG, 0.5 TO 1.0 M THICK UNDER SAND AND CLAY 2 M THICK. 2. BIRBIR GRAVELS = 0.0246 TOZ/CUYD 3. BETWEEN KOPE AND RAPIDS OF URIS, BIRBIR MEAN DERS ACROSS FLAT AREA. HAS OLD WORKINGS SUGGESTING GRAVELS BELOW HYDROSTATIC LEVEL UNDER 3 TO 6 M OF BARREN MATERIAL.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1924
Discoverer A. Prasso And A. Zappa
Year of first production 1925

Mining district

District name W. Ethiopia

Ownership information

  • Type Operator
    Owner Ethiopian Government
    First year 1957

Comments on the production information

  • 1 = 1575 KG PER 9.4 MILLION CUBIC METERS; GRADE RANGES: 1926 - 1937 = 0.3 TO 0.5 G/CUMETER; 1938 = 0.11 G/CUMETER

Comments on the reserve resource information

  • 1 = SODDO SECTOR; 3 AND 2 = KOPE AREA 1 KM X 0.75 M X 100 (?) M. AT 0.010 TOZ PER CU YD = 98096 CU YD
  • 1 AND 2 = RANGE OF RESERVE ESTIMATES FOR YUBDO SECTOR; NJ PAGES EST FOR SODDO SECTOR IS ONE - HALF PROD + RESERVES 3 = KOPE ALLUVIAL GRAVELS

Workings at the site

  • Type of workings Surface
    Area 200HA
    Overall width 6M

Reference information

Bibliographic references

  • Deposit

    MOLLY, E. W., 1959, ECON. GEOL, V. 54, P. 467 - 477

  • Deposit

    AUGUSTITHIS, 1965, CHEMIE DER ERDE, V. 24, P. 159 - 196

  • Deposit

    DUPARC AND MOLLY, 1928, MINERALOG - PETROGRAPH. MITTLG. V. 8, NO. 1, P. 240 - 257

  • Deposit

    AUGUSTITHIS, 1967, CHEM. GEOL., V. 2, P. 311 - 3295) OTTEMANN AND AUGUSTITHIS, 1967, MINERALIUM DEPOSITA, V. 1, P. 269 - 2776) IMPERIAL INST. OF GREAT BRIT., 1936, P. 96.7) USONI, L., 1952, RISORSE MINERARIE DELL' AFRICA ORIENTALE: UFFICIO STUDI DEL MINISTERO DELL' AFRICA ITALIANA, ROMA

  • Production

    MOLLY (1959, P. 475)

General comments

Subject category Comment text
Deposit MINE LATERITIC ELUVIUM ON TOP OF BIRBIRITE WHICH IS ON TOP OF DUNITE - AVERAGES 19.7 FT THICK

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1975 Gray, Floyd U.S. Geological Survey

Beyond USGS

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

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