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Cempaka-Danau Seran Paleochannels

Producer in Indonesia with commodities Diamond, Gold, PGE
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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. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Ownership information
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10110043
MRDS ID SP00003
Record type Site
Current site name Cempaka-Danau Seran Paleochannels
Alternate or previous names Deposits Near Tjempaka Or Goenoeng Lawak

Geographic coordinates

Geographic coordinates: 114.74946, -3.49807 (WGS84)
Relative position 16 MILES SOUTHEAST OF BANJARMASIN; 8 MILES SOUTHWEST OF MARTAPURA, DUE WEST OF CEMPAKA

Site location context

Political divisions (FIPS codes)

Indonesia(country)

Asia(continent)

Land(continent)

Geographic areas

Country
Indonesia

Comments on the location information

  • PALEOCHANNEL IS IN DRAINAGE SYSTEM OF THE MODERN SUNGAI APUKAN. THE PALEOCHANNEL IS A LARGE FEATURE THAT GENERALLY COVERS THE AREA BEWEEN THE ROAD FROM BANJARBARU TO ULIN AIRPORT AND FROM BANJARBARU TO BUNTOK. COORDINATES GENERALLY CENTERED ON AREA OF DEPOSIT.

Commodities

Commodity Importance
Diamond Primary
Gold Secondary
PGE Critical Secondary

Materials information

Materials Type of material
Diamond Ore
Cassiterite Gangue
Chromite Gangue
Cinnabar Gangue
Corundum Gangue
Rutile Gangue
Topaz Gangue

Mineral occurrence model information

Model code 119
USGS model code 39a
Deposit model name Placer Au-PGE
Mark3 model number 54

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel
    Rock unit name Martapura Formation
    Rock description Martapura Formation
    Stratigraphic age (youngest) Pleistocene
    Stratigraphic age (youngest) Pleistocene

Nearby scientific data

(1) 114.74946, -3.49807
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Generally Northeasterly

Ore body information

  • General form BLANKET
    Thickness 3M
    Length 15000M
    Width 800M
    Depth to top 23M
    Depth to bottom 26M

Controls for ore emplacement

  • Gravity Concentration In Alluvial Setting

Comments on the geologic information

  • PLEISTOCENE PALEOCHANNELS IN THE MARTAPURA FORMATION; BEDROCK IS SHALE/CLAY IN THE PLIOCENE DAHOR FORMATION. NO DIAMONDS IN GRAVEL BEDS IN THE DAHOR. DIAMONDS ARE DERIVED FROM LATE CRETACEOUS MANUNGGUL FORMATION. PRIMARY BEDROCK SOURCE FOR DIAMONDS NOT IDENTIFIED.

Economic information about the deposit and operations

Development status Producer
Commodity type Both
Deposit size Small
Significant No
Discovery year 1831
Year of first production 1831
Production years 1831 TO PRESENT

Ownership information

  • Type Joint Venture Owner
    Owner Joint Venture:
  • Type Joint Venture Partner
    Owner Acorn Resources
    Home office Australia
  • Type Joint Venture Partner
    Owner British Petroleum Minerals
  • Type Joint Venture Partner
    Owner P. T. Aneka Tambang

Comments on the reserve resource information

  • 80% OF DIAMONDS ARE GEM QUALITY; COLORS RANGE FROM CLEAR TO PINK TO BLUE TO YELLOW. FORTY PERCENT OF DIAMONDS ARE UNDER 1 CARAT, 20 PERCENT ARE OVER 5 CARATS. LARGEST RECORDED DIAMOND FOUND IN THESE DEPOSITS WEIGHED 167 CARATS. PLATINUM-GROUP METAL CONCENTRATES CONTAIN 67% PLATINUM (ANALYSIS BY P. T. ANEHA TAMBANG). NUGGET ANALYSES REPUBLISHED BY MERTIE (1969) HAVE PLATINUM RANGING FROM 74 TO 84 PERCENT. GRADE WAS DETERMINED BY BULK SAMPLING A TOTAL OF APPROXIMATELY 6000 M3 OF GRAVEL FROM SIX LOCALITIES IN THE DEPOSIT. RESOURCE/RESERVE TONNAGE NUMBER BASED ONLY ON GRAVELS LESS THAN 25 M DEEP.

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 15M

Comments on the workings information

  • GRAVELS IN CHANNELS ABOVE SWAMPS EXPLOITED BY LOCAL MINERS. VAN BEMMELEN (1949) NOTES THERE WERE 200 MINES WITH 3000-4000 MINERS IN THIS GENERAL AREA IN 1836. LOCAL MINERS LIMITED BY DEPTH OF GRAVELS AND SWAMPY GROUND. LOCAL MINERS EXPLOIT GRAVELS BY SINKING SHAFTS TO GRAVEL BED, MINING THE GRAVEL, WASHING AND THEN PANNING GRAVEL TO RECOVER DIAMONDS, GOLD, AND PLATINUM-GROUP METALS. THE GENERAL POSITION AND TRENDS OF THE PALEOCHANNELS CAN BE MAPPED BY NOTING WHERE LOCAL MINERS HAVE BEEN DIGGING. DEVELOPED PROSPECT IS ON THE EXTENSION OF PALEOCHANNELS BENEATH THE SWAMPS. IF EXPLOITED, THESE GRAVELS WOULD BE MINED BY A DREDGE.

Comments on development

  • DEPOSIT WORKED BY LOCAL MINERS SINCE THE 1830'S. EXPLORATION PROJECT STARTED BY P. T. ANEKA TAMGANG IN 1968. JOINT VENTURE WITH ACORN AND BP MINERALS IN 1986. EXPLORATION FINISHED IN 1988. APPROXIMATELY 1500 BANKA HOLES, EACH APPROXIMATELY 30 M DEEP, WERE DRILLED IN A 3-YEAR PERIOD.

Reference information

Bibliographic references

  • Deposit

    VAN BEMMELEN, R. W., 1949, THE GEOLOGY OF INDONESIA: GOVERNMENT PRINTING OFFICE, THE HAGUE, VOL. IA, 732P., VOL. II, 267P.

  • Deposit

    MERTIE, J. B., JR., 1969, ECONOMIC GEOLOGY OF THE PLATINUM-METALS: U. S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 630, 120P.

  • Deposit

    SIKUMBANG, N., AND HERGANTO, R., 1986, REPORT ON THE GEOLOGY OF THE BANJARMASIN QUADRANGLE, SOUTH KALIMANTAN, SCALE 1:250,000: GEOLOGICAL AND AERIAL PHOTO INTERPRETATION PROJECT, GEOLOGIC MAPPING DIVISION, GEOLOGICAL RESEARCH AND DEVELOPMENT CENTRE, BANDUNG, UNPUB. REPORT, 30P.

  • Deposit

    KROL, L. H., 1920, OVER DE GEOLOGIE VAN EEN GEDEELTE VAN DE ZUIDER-EN OOSTERAFDEELING VAN BORNEO: JAARB, MIJNWEZEN IN NED. OOST-INDIE, 1918, VERH. I, P. 281-367.

  • Reserve-Resource

    ALWI WIKRAMA, P. T. ANEKA TAMBANG, PERSONAL COMMUNICATION.

General comments

Subject category Comment text
Deposit Discovery Year: 1831 (APPROX.)
Deposit PALEOCHANNEL IS APPROXIMATELY 15 KM LONG; GRAVEL BEDS 7 TO 23 M DEEP. GRAVELS OCCUR IN CHANNEL DEPOSITS, UP TO 3 M THICK; IN TERRACE DEPOSITS, UP TO 0.5 M THICK. GRAVELS IN CHANNELS 200 TO 800 M WIDE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1990 Zientek, Michael L. U.S. Geological Survey

Beyond USGS

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

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