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Lao Cai

Producer in Vietnam with commodity Phosphorus-Phosphates
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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. Economic information about the deposit and operations
  10. Ownership information
  11. Reserves and resources
  12. Workings at the site
  13. Links to other databases
  14. Bibliographic references
  15. Reporter information

Geologic information

Identification information

Deposit ID 10207264
MRDS ID I000103
MAS/MILS ID 5500000004
Record type Site
Current site name Lao Cai
Alternate or previous names Lao Kay
Related records 10106727

Geographic coordinates

Geographic coordinates: 103.99971, 22.99938 (WGS84)

Site location context

Political divisions (FIPS codes)

Vietnam(country)

Asia(continent)

Land(continent)

Geographic areas

Country
Vietnam

Commodities

Commodity Importance
Phosphorus-Phosphates Primary

Materials information

Materials Type of material
Apatite Unknown
Mica Unknown
Pyrite Unknown
Quartz Unknown

Nearby scientific data

(1) 103.99971, 22.99938
ListMap

Economic information

Ore body information

  • Thickness 6M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 STRATIFORM
    Shape of Orebody #1 MASSIVE
    Primary mode of Origin METAMORPHISM
    Secondary mode of Origin OTHER
    Primary Ore Control IGNEOUS
    Secondary Ore Control OTHER
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 OTHER
    Date of Last Modification 911002

Comments on the geologic information

  • "THE MAIN PHOSPHORITE HORIZON IS A REGIONAL METAMORPHISED GREY DOLOMITE-APATITE ROCK, WITH ADMIXED QUARTZ, PYRITE AND MICA, IN WHICH THE AMORPHOUS PHOSPHATE OF THE ORIGINAL ROCK HAS BEEN ALTERED TO MICROCRYSTALLINE FLURAPATITE. IT VARIES IN THICKNESS FROM 6-12M AND, IN THE WEATHERED STATE IN WHICH IT IS KNOWN AS GRADE 2 ORE, CARRIES 23-24% P2O5."BRIT SULPH. "WEATHERING OF THE UPPER ZONES, REMOVING CARBONATE AND SILICA IN SOLUTION, HAS GIVEN RISE TO SIGNIFICANT RESERVES OF A HIGH-GRADE ORE, CARRYING 35-42% P2O5, KNOWN AS GRADE 1 ORE." BRIT SULPH.

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Non-metallic
Significant No
Discovery year 1924
Year of first production 1940
Milling method Flotation

Ownership information

  • Type Owner-Operator
    Owner Government Of Vietnam
    Interest 100
    Home office Vietnam
    Year 1985

Reserves and resources

  • Type In-situ
    Estimate year 1987
    Total resources 1000000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Phosphorus-Phosphates P2O5 22 wt-pct Phosphorus Major 1987
  • Type In-situ
    Estimate year 1989
    Total resources 1700000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Phosphorus-Phosphates P2O5 35 wt-pct Phosphorus Major 1989

Comments on the reserve resource information

  • APATITE MINE IN HATUYAN PROVINCE ON CHINESE BORDER. WAS MAJOR APATITE PRODUCER AND EXPORTER UNTIL DESTROYED IN 1979 BORDER CLASH. PRODUCTION RETURNING BUT NOT AT OLD LEVELS YET. MANAGEMENT PROBLEMS STILL EXIST. BORDER PROBLEMS NOT SOLVED EITHER.
  • M1C1=M9C4. THE LAO CAI DEPOSIT CONSISTS OF TWO SEPARATE DEPOSITS KAM DUENG AND MAU KOK, EACH WHICH CONSISTS OF THREE GRADE ZONES RANGING FROM APPROXIMATELY 35% TO 19% P2O5.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method OPEN PIT
    Capacity 833
    Capacity Units MT ORE/DAY
    Operating Days per Year 300
    Operating Shifts per Day 2
    Year of Information 1987
  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Capacity 3333
    Capacity Units MT ORE/DAY
    Operating Days per Year 300
    Operating Shifts per Day 2
    Year of Information 1987

Comments on other economic factors

  • EXPANSION OF THE MILL WAS REPORTED RECENTLY, HOWEVER NO DETAILS WERE GIVEN.

Reference information

Bibliographic references

  • Reserve-Resource

    BRITISH SULPHUR CORPORATION, WORLD SURVEY OF PHOSPHATE

  • Reserve-Resource

    DEPOSITS, FIFTH ED, LONDON, 1987, PP. 206-207.

  • Reserve-Resource

    MINING JOURNAL, SEPTEMBER 15, 1989, P. 216.

  • Deposit

    MINING ANNUAL REVIEW, 1987, P. 362.

  • Deposit

    INTERNATINOAL MINING, AUGUST 1988, P. 105.

  • Deposit

    INDUSTRIAL MINERALS, 8/91, P. 49.

Reporter information

Type Date Name Affiliation Comment
Reporter 05-APR-1995 Fantel, Richard J. U.S. Bureau of Mines

Beyond USGS

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

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