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  3. Mineral Resource Data System (MRDS)

Inayawan

Prospect in Philippines with commodity Copper
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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. Ownership information
  12. Reserves and resources
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10183430
MAS/MILS ID 5650250005
Record type Site
Current site name Inayawan
Alternate or previous names Denmag-Philippines

Geographic coordinates

Point of reference Claim
Geographic coordinates: 122.44928, 9.85063 (WGS84)
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Philippines(country)

Asia(continent)

Land(continent)

Geographic areas

Country
Philippines

Commodities

Commodity Importance
Copper Tertiary

Materials information

Materials Type of material
Bornite Unknown
Chalcopyrite Unknown

Nearby scientific data

Claim (1) 122.44928, 9.85063
ListMap

Economic information

Ore body information

  • Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 UNKNOWN
    Primary mode of Origin SEDIMENTATION
    Primary Ore Control FRACTURING
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Date of Last Modification 810721
  • Area 255HA
    Field Value
    Total Surface Area (HA) 255
    Date of Last Modification 910418

Economic information about the deposit and operations

Operation type Surface
Development status Prospect
Commodity type Metallic
Significant Yes
Discovery year 1970
Mining method Open Pit
Milling method Flotation

Mining district

District name Sipalay

Ownership information

  • Type Owner
    Owner Denmag (Philippines) Inc.
    Interest 100
    Home office Philippines
    Year 1971

Comments on the production information

  • YEAR OF DISCOVERY NOT KNOWN, FIRST MENTION IS OF INVESTIGATION MADE IN 1970. INTEREST IN DEVELOPMENT APPARENTLY ACCELERATED BY 1973, WITH KENNECOTT TAKING AN ACTIVE INTEREST IN THE PROPERTY. HOWEVER, DEPRESSED COPPER PRICES LED KENNECOTT TO WITHDRAW ITS ACTIVITIES BY 1976.

Reserves and resources

  • Type In-situ
    Estimate year 1971
    Inferred 49000000mt ore
    Total resources 49000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.75 wt-pct Copper Trace 1971

Comments on the reserve resource information

  • D.B. HAS AYA AYA PROS. & AYA AYA MNG. CO. JAN 1 1980 RESERVES-GEOLOGICAL
  • RESERVES BASED ONLY ON LIMITED DRILLING BY KENNECOTT IN 1973 - 1975 AND THAT MUCH MORE EXPLORATION REQUIRED TO FIRM UP RESERVE AS OF 1980. QMAT 1 AND 9 SHOW MINABLE RESERVES AT A 95% RECOVERY AND A 10% DILUTION.
  • PHILIPPINE BUREAU OF MINES STANDARDS FOR SUBMITTING CLAIMS BY ANY POTENTIAL DEVELOPER ARE SUCH THAT THIS IS CONSIDERED TO BE A MINIMUM FIGURE AND THUS IS A GOOD BASIS FOR COSTING AT THE DEMONSTRATED LEVEL.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Percent Waste Rock 66.7
    Capacity 10000
    Capacity Units MT ORE/DAY
    Unit Production Cost 2.99
    Units of Production $/MT ORE
    Operating Days per Year 312
    Operating Shifts per Day 2
    Year of Information 1980

Comments on the workings information

  • POWER - NATIONAL POWER GRID

Reference information

Bibliographic references

  • Reserve-Resource

    ANON.1971."DEMMAG (PHILIPPINES) INC.," PHILIPPINE MINING AND

  • Reserve-Resource

    ENGINEERING JOURNAL. JANUARY

  • Deposit

    MIRANDA, F.E. ET AL 1978. "DATA ON PHILIPPINE MINERAL

  • Deposit

    RESOURCES," PHILIPPINE BUREAU OF MINES,I.C. NO.22, P.32.

  • Deposit

    WALTHER, H.W. ET AL 1976."DEPOSITS AND MINING IN THE

  • Deposit

    PHILIPPINES," REPORT BY A FACT FINDING MISSION OF THE

  • Deposit

    FEDERAL INSTITUTE FOR GEOSCIENCES AND NATURAL RESOURCES,

  • Deposit

    WEST GERMANY. P. 64.

  • Deposit

    ZERDA, R. 1978. INAYAWAN COPPER PROSPECT (DENMAG PHIL. INC.)

  • Deposit

    INAYAWAN,CAUAYAN,NEGROS OCCIDENTAL," PHILIPPINE BUREAU OF

  • Deposit

    MINES REPORT OF INVESTIGATION NO. 95, FEB. MANILA. P. 20.

Reporter information

Type Date Name Affiliation Comment
Reporter 14-OCT-92 Rgc/Ke/Dab 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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