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Nama Retention License

Prospect in Zambia with commodities Copper, Cobalt, Nickel
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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. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Reserves and resources
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10400371
Record type Deposit
Current site name Nama Retention License

Geographic coordinates

Geographic coordinates: 27.51549, -12.19783 (WGS84)

Site location context

Political divisions (FIPS codes)

Zambia(country)

Africa(continent)

Land(continent)

Geographic areas

Country
Zambia

Commodities

Commodity Importance
Copper Primary
Cobalt Critical Primary
Nickel Critical Primary

Materials information

Materials Type of material
Magnetite Ore
Pyrite Ore
Chalcopyrite Ore
Hematite Ore
Chlorite Gangue
Talc Gangue
Epidote Gangue
Silica Gangue
Hematite Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock
    Rock type qualifier mixtite
    Rock unit name Kundulungu Group

Nearby scientific data

(1) 27.51549, -12.19783
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Economic information

Economic information about the deposit and operations

Operation type Surface
Development status Prospect
Significant Yes

Reserves and resources

  • Type In-situ
    Name Nama D
    Estimate year 2008
    Total resources 63909000mt ore
    Remarks Indicated + Inferred = 63,909,000 @ 0.035% Cu and 0.0802% Co
  • Type In-situ
    Name Nama Anomaly C, indicated
    Estimate year 2007
    Indicated 78218000mt
    Remarks Nama Anomaly C has indicated resource of 78,218,000 mt @ 0.012% cu and 0.043% Co. Based on 73 drill holes. (Grant and Haslett, 2007).
    Commodity Subtype Grade units Group Importance Year
    Copper 0.012 wt-pct Copper Primary 2007
    Nickel 0.019 wt-pct Nickel Primary 2007
    Cobalt 0.043 wt-pct Cobalt Primary 2007
  • Type In-situ
    Name Nama A
    Estimate year 2008
    Indicated 43656000mt ore
    Remarks @ 0.099% Cu and 0.055% Co

Comments on the reserve resource information

  • Cutoff grade for Caledonia based on 0.02% Co (not Cu.) (Grant and Haslett, 2007, p. 56). Resources calculated to 120 meters below surface.

Reference information

Bibliographic references

  • Deposit

    Grant, David, and Haslett, Michael, 2007, Independent competent persons report of the Nama retention license in northern Zambia and held by Caledonian Mining Limited, May 1, 2007, 67 p. [available from sedar.com, Caledonia Mining Corporation, May 7, 2007, Technical report (NI-43-101) - English as of 5/26/10]. p. 58.

  • Deposit

    ACP Mining Data Bank [Secretariat of the African and Caribbean and Pacific Group of States Group], undated, http://mines.acp.int/html/mine_ZMB-00088_en.html

  • Deposit

    Grant, David, 2008, Independent Qualified Person Report for Resource Body D in the Nama Retention Licence[sic], Northern Zambia: Report prepared for Caledonia Mining Corp and Caledonia Nama Ltd, (dated May 1, 2008), 51 p. (Available for download at www.sedar.com [Caledonia Mining Corporation, Technical report (NI-43-101) - English, filed May 2, 2008]).

General comments

Subject category Comment text
Deposit Deposit is NOT of the sed-hosted Cu type.
Deposit From Tim Hayes, Jan 22, 2010:
"NAMA was classified as not sed-hosted copper, because it does not fit the overall sediment-hosted strata-bound Cu model on a number of counts:
(1) the resource number is associated with body of epigenetic hematite and magnetite, not with any type of reduced rock that is carbonaceous or pyritic nearby,
(2) copper grades are 0.05%; that's no copper deposit of any kind in my book; the values at Nama are mostly in Co, but that too is not all that great: 0.08%; certainly adding something that is 0.05% Cu is going to be an extreme outlier on any grade model;
(3) these values are associated with the body described as taking the aspect of an antiform that cuts across stratigraphy up in the Mwashya Fm., It certainly isn't stratiform, therefore, and it is questionable from current knowledge whether is is strata-bound, though as currently described, it could be.
There is one more described body of oxide-hosted cobalt-anomalous rock around in the CACB. It is NNE of Musoshi and WNW of Kinsenda hosted in Lefebvre's Kalumbalesa Group (basal conglomeratic clastics of the Katangan Supergroup; most from Zambia would make this part of the Mindola Clastics Formation. Others who have worked in the SE part of the Copperbelt in DRC would name it Chimfunsi Fm. It is clearly down section from either the Copperbelt Orebody Member and probably down section from R.A.T. It might correlate with the basal conglomerates of the Katangan of the Nzilo, DRC, area.). The hematite mineralization near Kalumbalesa, DRC, averages 16 ppm Cu and 82 ppm Co. Thus the Co is anomalous, though 10X less concentrated than at Nama. The Cu is not even anomalous.
(4) Last but not least; the plunging antiformal hematite-magnetite mineralization is open to the north."

Reporter information

Type Date Name Affiliation Comment
Reporter 04-JUN-10 Wilson, Anna B. U.S. Geological Survey

Beyond USGS

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

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