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Masinloc Mines

Producer in Philippines with commodities Corundum, Calcium, Chromium, Iron, Magnesite, Silica
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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. Mining district
  11. Mineral rights holdings
  12. Ownership information
  13. Reserves and resources
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10183284
MAS/MILS ID 5650150004
Record type Site
Current site name Masinloc Mines
Alternate or previous names Corral; Calot ; Tambalao; Tatupul, Ao; Takipan; Jades Palm;Baramor, Orebodies., Coto; Hayden; Harding; Murphy;

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 120.08682, 15.56678 (WGS84)
Elevation 200
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Philippines(country)

Asia(continent)

Land(continent)

Geographic areas

Country
Philippines

Commodities

Commodity Importance
Corundum Tertiary
Calcium Tertiary
Chromium Critical Primary
Iron Tertiary
Magnesite Tertiary
Silica Tertiary

Materials information

Materials Type of material
Chromite Unknown

Nearby scientific data

Ore Body (1) 120.08682, 15.56678
ListMap

Economic information

Ore body information

  • Strike N45E
    Dip 50S
    Thickness 20M
    Length 1560M
    Width 550M
    Depth to top 0M
    Field Value
    Type of Orebody #1 OTHER
    Shape of Orebody #1 OTHER
    Shape of Orebody #2 IRREGULAR
    Shape of Orebody #3 MASSIVE
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control BEDDING
    Secondary Ore Control CONTACT ZONE
    Degree of Wallrock Alter. SLIGHT
    Type of Wallrock Alter. #1 OTHER
    Strike And Dip N45E:50S
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 790707

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Producer
Commodity type Both
Significant No
Discovery year 1930
Year of first production 1937

Mining district

District name Masinloc

Mineral rights holdings

Type of mineral rights Located Claim

Ownership information

  • Type Owner
    Owner Consolidated Mines Inc.
    Interest 100
    Home office Philippines
    Year 1969
  • Type Operator
    Owner Benguet Consolidated Inc.
    Home office Philippines
    Year 1969

Reserves and resources

  • Type In-situ
    Estimate year 1963
    Measured 6001000000mt ore
    Demonstrated 6001000000mt ore
    Total resources 6001000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Chromium Cr2O3 34.88 wt-pct Chromium Major 1963
    Silica SiO2 5 wt-pct Silica Trace 1963
    Corundum Corundum 29.4 wt-pct Abrasives Trace 1963
    Magnesite MgO 10.8 wt-pct Magnesium Trace 1963
    Iron Fe 10.6 wt-pct Iron Trace 1963
    Calcium Ca 0.5 wt-pct Calcium Trace 1963

Comments on the reserve resource information

  • RESERVES FOR RECORD 1 EXCLUDE 1.7 MILLION TONS DISSEMINATED CHROMITE, 1.4 MILLION TONS HIGH SILICA CHROMITE AND 435,000 TONS OF STOCKPILED FINES.

Reference information

Bibliographic references

  • Reserve-Resource

    ENGINEERING AND MINING JOURNAL (E/MJ) INTERNATIONAL DIRECT-

  • Reserve-Resource

    ORY OF MINING AND MINERAL PROCESSING OPERATIONS, 1978,

  • Reserve-Resource

    P. 330.

  • Reserve-Resource

    ENGINEERING AND MINING JOURNAL, PHILIPPINE ECONOMIC REVOLU-

  • Reserve-Resource

    TION EXPECTED TO PROMOTE PICKUP IN MINING INDUSTRY: NO-

  • Reserve-Resource

    VEMBER 1963, P. 90.

  • Reserve-Resource

    PHILIPPINE BUREAU OF MINES, MINERAL RESOURCES OF THE PHILIP-

  • Reserve-Resource

    PINES: INFORMATION CIRCULAR NO. 19, 1955, P. 48-54.

  • Deposit

    BRYNER, L., ORE DEPOSITS OF THE PHILIPPINES - AN INTRODUC-

  • Deposit

    TION TO THEIR GEOLOGY: ECONOMIC GEOLOGY, VOL. 64, 1969,

  • Deposit

    P. 647-648.

  • Deposit

    MINING MAGAZINE, VOL. 127, NO. 3, SEPTEMBER 1972, P. 30.

  • Deposit

    WORLD MINES REGISTER 76/77, BENGUET CONSOLIDATED INC., CMI

  • Deposit

    CONTRACT: VOL. 31, MILLER FREEMAN PUBLICATIONS, SAN FRAN-

  • Deposit

    CISCO, 1976, P. 132.

  • Deposit

    BRYNER,L.,1969,ORE DEPOSITS OF THE PHIL.;ECON.GEOLOGY,VOL.64

  • Deposit

    SULIT,J.P,1967(IN PRESS),GEOPHYSICAL EXPLOR-MASINLOC,IN PROC

  • Deposit

    ,2ND GEOL.CONV.1ST SYMP.GEOL. OF PHIL.,MANILA 1967.(RPTD BY

  • Deposit

    AUSTRALIAN MINING, LOW METAL PRICES HIT PHILIPPINE MINING

  • Deposit

    INDUSTRY: VOL. 69, NO. 3, MARCH 1977, P. 24.

  • Deposit

    MINING JOURNAL, SEPTEMBER 25, 1964.

  • Deposit

    PHILIPPINE BUREAU OF MINES, MINERAL NEWS SERVICE, NO. 71,

  • Deposit

    AUGUST 1976, P. 6, 13.

  • Deposit

    ANNUAL REPORT, BENGUET CONSOLIDATED INCORPORATED: 1976,

  • Deposit

    1977.

  • Deposit

    ROA, C.G., CHROMITE IN THE PHILIPPINES: PHILIPPINE BUREAU OF

  • Deposit

    MINES INFORMATION CIRCULAR NO. 15, MAY 1953, P. 9-10.

  • Deposit

    FERNANDEZ, N.S., NOTES ON THE GEOLOGY AND CHROMITE DEPOSITS

  • Deposit

    OF THE ZAMBALES RANGE: THE PHILIPPINE GEOLOGIST, VOL. XIV,

  • Deposit

    NO. 1, MARCH 1960, P. 1-8.

  • Deposit

    PHILIPPINE BUREAU OF MINES, CHROMITE IN THE PHILIPPINES:

  • Deposit

    INDUSTRIAL DEVELOPMENT DIVISION, DEVELOPMENT OF MINERAL

  • Deposit

    RESOURCES IN ASIA AND THE FAR EAST, UNECAFE, 1953, P. 261-

  • Deposit

    267.

  • Deposit

    STOLL, W.C., MASINLOC CHROMITE DEPOSITS: GEOLOGICAL SOCIETY

  • Deposit

    OF AMERICA BULLETIN 69, 1958, P. 419.

  • Deposit

    CRISOTOMO, A.T., MASINLOC CHROMITE MINE: MINING NEWSLETTER

  • Deposit

    (PHILIPPINES), MARCH-APRIL 1963, P. 5.

  • Deposit

    BASCO, D.M., CHROMITE DEPOSIT; CONSOLIDATED MINES: MINING

  • Deposit

    NEWSLETTER, MARCH-APRIL 1961, P. 22.

  • Deposit

    UNITED NATIONS COMMISSION ON THE DEVELOPMENT OF MINERAL

  • Deposit

    RESOURCES IN ASIA AND THE FAR EAST (UNECAFE), MINERAL

  • Deposit

    RESOURCES DEVELOPMENT SERIES NO. 33, 1968, P. 118.

  • Deposit

    SULIT, J.P., GEOPHYSICAL EXPLORATION - MASINLOC: IN PROCEED-

  • Deposit

    INGS, 2ND GEOLOGICAL CONVENTION, 1ST SYMPOSIUM OF GEOLOGY

  • Deposit

    OF PHILIPPINES, MANILA, 1967.

  • Deposit

    PHILIPPINE BUREAU OF MINES, SUMMARY OF THE MINERAL DEPOSITS

  • Deposit

    OF THE PHILIPPINES: INFORMATION CIRCULAR NO. 12, 1952,

  • Deposit

    P. 10.

  • Deposit

    UNITED NATIONS ECONOMIC COMMISSION ON ASIA AND THE FAR EAST

  • Deposit

    (UNECAFE), MINERAL RESOURCES DEVELOPMENT SERIES NO. 33,

  • Deposit

    NEW YORK, 1968, P. 116, 118.

  • Deposit

    PHILIPPINE BUREAU OF MINES, DATA ON PHILIPPINE MINERAL RE-

  • Deposit

    SOURCES: INFORMATION CIRCULAR NO. 22, MANILA, JANUARY,

  • Deposit

    1975, P. 1, 18.

General comments

Subject category Comment text
Deposit THE MASINLOC MINES ARE LOCATED ALONG A NORTH-NORTHEASTERLY- TRENDING BELT 40 KM LONG OF GABBROIC ROCK. THE ROCKS ARE PART OF THE ZAMBALES ULTRAMAFIC COMPLEX, CLASSIFIED AS AN "ALPINE TYPE" COMPLEX. THE MINE IS LOCATED IN COTO, MASINLOC, ABOUT 150 KM N40W OF MINILA. 800TPD PRODUCTION-1967; IN 1973-484,609DMT AT 1360TPD LYING LENS ABOUT 600 METERS LONG, 300 METERS WIDE AND AS MUCH AS 80 M THICK. MAGNETIC AND GRAVITY SURVEYS COMBINED WITH GEOLOGIC STUDIES LED TO THE DISCOVERY IN 1964 AND 1965 OF FOUR "BLIND" ORE- BODIES AGGREGATING 3.25 MILLION TONS. MINES YIELD REFRACTORY TYPE CHROMITE ORE. BENGUET CONSOLIDATED HAS OPERATED THE MINES UNDER CONTRACT FROM CONSOLIDATED MINES INCORPORATED SINCE 1934. 1976- THE NUMBER OF EMPLOYEES IS 1000. THE CAPACITY AND CRUDE ORE MINED IS 3800 TONS/DAY. THE UNDERGROUND MINE IS DEVELOPED BY ADIT AND VERTICAL SHAFT. THE SYSTEM OF UNDERGROUND MINING IS BY TIMBERED STOPES AND ROOM AND PILLAR. THE OPEN PIT OPERATIONS YIELD 3400 TONS ORE/DAY AND 17,000 TONS/DAY OF WASTE STRIPPED. OPEN PIT EQUIPMENT INCLUDES BLAST HOLE DRILLS, SHOVELS, BULLDOZERS AND TRUCKS. THE MILL CONCENTRATES 2000 TONS ORE/DAY BY THE GRAVITY METHOD AND 2000 METRIC TONS/DAY BY THE HEAVY MEDIA SEPARATION METHOD. BENGUET RECEIVES 25% OF THE NET PROCEEDS FROM SALES OF THE CHROMITE ORE. 1978 - DAILY ORE CAPACITY IS 3000 ROM TONS/DAY AT 34% CHROMITE (CR2O3). MILL EXTRACTION INCLUDES WASHING, HEAVY MEDIA SEPARATION AND GRAVITY CONCENTRATION. PRIOR TO 1975 CONSOLIDATED MINES INCORPORATED WAS THE ONLY REFRACTORY CHROMITE PRODUCER IN THE PHILIPPINES. 1964 - AN AERIAL TRAM WAS INSTALLED AND ORE STARTED TO BE TAKEN FROM THE GOVERNMENT ZAMBIA MINERAL RESERVATION. 1976 - CHROMITE ORE PRODUCTION SUFFERED A DECLINE IN VOLUME ALTHOUGH VALUES INCREASED BY ABOUT 50%. THIS WAS CAUSED BY THE SPECTACULAR RISE IN PRICE OF CHROMITE. PRODUCTION COST PER TON OF ORE WAS GREATLY INFLUENCED BY A 3-MONTH SUSPENSION OF SHIPMENTS DUE TO DAMAGE WROUGHT BY TYPHOON "DIDANG". THE COST PER TON IN 1976 WAS $21.80 COMPARED TO $13.28 IN 1975. 1953 - PRODUCTION BEGAN IN 1938. THE ORE PROPERTY LIES 24 KM EAST OF THE MUNICIPALITY OF MASINLOC, ZAMBALES PROVINCE. ORE IS CONFINED TO A HILL ABOUT 150 METERS HIGH AND 300 METERS IN DIAMETER. THE ORE RESERVES IN A SINGLE OREBODY NEAR THE SURFACE IS ESTIMATED AT 10 MILLION METRIC TONS. IT IS REFRACTORY AND SUITABLE FOR REFRACTORY FIRE- BRICK. BEFORE THE WAR, ORE RESERVES STOOD AT 9 MILLION METRIC TONS, BUT SUBSEQUENT DIAMOND DRILLING HAS REVEALED MORE TONNAGE. AT THE CURRENT RATE OF ANNUAL PRODUCTION WHICH IS 300,000 TONS, THE LIFE OF THE MINE IS ESTIMATED AT MORE THAN 30 YEARS. THIS IS THE LARGEST KNOWN REFRACT- ORY CHROMITE DEPOSIT IN THE WORLD. 1968 - 43 HOLES AMOUNTING TO 4880 METERS OF DIAMOND DRILLING AND 1690 METERS OF UNDERGROUND DEVELOPMENT HAVE BEEN DONE.

Reporter information

Type Date Name Affiliation Comment
Reporter 27-FEB-1984 Erikson 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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