Norsk versjon
THE INDUSTRIAL MINERAL DATABASE
Deposit 3909 - 302 Kodal
(Object Id: 8538)
(Last updated: 05.02.2021)

Location
County: Vestfold Municipality: Larvik (3909)
Map 1:50000: Sandefjord (1813-3) Map 1:250000: Oslo
Coordinate system: EU89-UTM Zone 32
East: 559018 m. North: 6565691 m.
Longitude: 10.0340800 Latitude: 59.2261470
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Resource
Resource Type: Other industrial minerals Resource Subtype: Apatite

Importance
Raw material meaning: International Importance (reg. 04.02.2015)

Resources and production
Activity: Exploration Reserves: 4900 thousand tons
Operating method: Historical production:


Operations
From - To Activity Comments
1973 - 1984 Core drilling Company/Institution :Norsk Hydro

Mineralization
Genesis: Form:
Main texture: Min. distribution:
Main grain size:
Strike/Dip: Direction:
Plunge:
Stratigraphic classification of host rock
Era: Period:
Province:
Geotec.unit:
Tectonic complex:
Igneous complex:
Group: Formation:

Mineralogy
Mineral Amount
Apatite Major mineral (10-50%)

Information(s) in free text format
Description
The Kodal orebody is 1.9 km long and sits in an almost vertical orientation. The depth extent of the deposit is not known however geophysical research in the 1970s suggested it could continue to 800+ metres. The deepest borehole intersection to date is 300 m. The deposit is of variable thickness but generally consists of a 20 metre wide main ore zone within a transition zone grading out on either side. The total width of mineralisation is approximately 120 m The Kodal deposit is an igneous deposit, unlike most of the world’s mined phosphate deposits, which are sedimentary in origin. The Kodal deposit is unusual in that it appears from preliminary test work that economic recoveries and grades of Fe and P2O5 are achievable at Kodal, assuming that the material on which test work was undertaken may be considered representative of the mineralised zones. The initial conceptual optimisation for the Kodal project was a surface mine operating for 15 years processing 1.6 million tonnes of ore per year. Subsequent work including the processing of transitional material suggested the project life might be extended to 20 years. It is possible that the project could produce about 200,000 tonnes of phosphate concentrate per year at a grade of 41.8% P2O5 and 650,000 tonnes of iron concentrate per year at a grade of 62% Fe. i

Bibliography:
From NGU's Reference Archive:
Lindberg, Per Aksel , 1985
Fe-Ti-P mineralizations in the Larvikite - Lardalite complex, Oslo Rift.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU Bulletin; No.402;93-98 pages
Abstract:
The larvikite-lardalite complex in the southermost part of the Permian Oslo Rift hosts a number of Fe-Ti-P concentrations. Some of these have been investigated by Norsk Hydro a.s. with regard to their possible potential as phosphate resources. A short review of the relationship of the mineralization to the structure and petrology of the complex is given. The only occurrence with an economic potential, the Kodal orebody, is described in detail. The Kodal orebody represent a resource of 70 Mt. of ore minable in an open pit. The ore contains a total of 11.6 Mt. of phosphate.

Dalsegg, Einar , 1974
VLF-målinger Kodalsfeltet. Hedrum/Andebu.
;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.1232;5 pages

Kihle, Ola , 1976
CP-målinger Kodal/Andebu, Grøsli Gruve/Flesberg.
;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.1344;4 pages
Abstract:
Det foreligger ingen formell rapport over målingene. Resultatene av målingene over Kodalforekomsten ble meddelt oppdragsgiver Norsk Hydro A/S i et brev samt et kart som viser potensialbildet over forekomsten. I tillegg til de ordinære CP-målinger i Kodal ble det foretatt ledningsevnemålinger på bakken og i de borhull som det ble jordet i. Den foreløpige konklusjon ut i fra CP-målingene over Kodalforekomsten: 1. Forekomsten går minst 1000 meter mot dypet, muligens betydelig dypere. 2. Det er ikke funnet grunnlag for å anta at fallet flater ut mot syd i de øverste 1000 meter. Det nevnte brev og kartbilag ligger i NGU's arkiv. Når det gjelder Grøsli gruve så viste det seg at borhullene som det skulle jordes i var tette. Målingene ble derfor ikke utført.

Sindre, Atle , 1983
Tyngdemålinger ved Kodal
;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.2095;8 pages
Abstract:
Tyngdemålinger ble utført langs tre profiler like nord for den kjente Jacupi- rangittforekomsten i Kodal. Hvert profil var 2 km langt, og det ble målt for hver 50 m. De to sørligste profilene viser klare positive anomalier. Modellberegninger viser hvilke anomalier en del tyngre kropper vil gi. Disse anomaliene er sammenlignet med de målte anomaliene. Det anbefales å undersøke geologien mer langs profilene og å gjøre flere tetthetsbestemmelser.

Stadheim, J. , 1938
Kodal, Andebu. (Fra J. Stadheims dagbok)
;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 2754;2 pages
Abstract:
Rapporten er en renskrivning av dagbok fra en befaring av forekomsten. Det gis en del dimensjoner på forekomsten og historie om drift.

Bergstøl. Sveinung , 1973
Diamantborkjerner fra Andersbotn, Kodal
;Norsk Hydro;RAPPORT;Bergarkivet; No.BA 8201;28 pages

Name of Sample point: LARV195783
(Object Id: 39239 302,00,01)

Location
County: Vestfold Municipality: Larvik (3909)
Map 1:50000: Sandefjord (1813-3) Map 1:250000: Oslo
Coordinate system: EU89-UTM Zone 32
East: 563205 m. North: 6557831 m.
Longitude: 10.1051490 Latitude: 59.1549650
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Resource
Resource Type: Other industrial minerals Resource Subtype: Apatite


Name of Sample point: KODAL195773
(Object Id: 39240 302,00,02)

Location
County: Vestfold Municipality: Larvik (3909)
Map 1:50000: Sandefjord (1813-3) Map 1:250000: Oslo
Coordinate system: EU89-UTM Zone 32
East: 558899 m. North: 6565824 m.
Longitude: 10.0320190 Latitude: 59.2273520
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Resource
Resource Type: Other industrial minerals Resource Subtype: Apatite


Name of Sample point: KODAL195775
(Object Id: 39241 302,00,03)

Location
County: Vestfold Municipality: Larvik (3909)
Map 1:50000: Sandefjord (1813-3) Map 1:250000: Oslo
Coordinate system: EU89-UTM Zone 32
East: 559067 m. North: 6565742 m.
Longitude: 10.0349570 Latitude: 59.2266010
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Resource
Resource Type: Other industrial minerals Resource Subtype: Apatite


Name of Sample point: KODAL112567
(Object Id: 39242 302,00,04)

Location
County: Vestfold Municipality: Larvik (3909)
Map 1:50000: Sandefjord (1813-3) Map 1:250000: Oslo
Coordinate system: EU89-UTM Zone 32
East: 558908 m. North: 6565818 m.
Longitude: 10.0321920 Latitude: 59.2272970
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Resource
Resource Type: Other industrial minerals Resource Subtype: Apatite


Name of Sample point: KODAL112568
(Object Id: 39243 302,00,05)

Location
County: Vestfold Municipality: Larvik (3909)
Map 1:50000: Sandefjord (1813-3) Map 1:250000: Oslo
Coordinate system: EU89-UTM Zone 32
East: 558908 m. North: 6565818 m.
Longitude: 10.0321920 Latitude: 59.2272970
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Resource
Resource Type: Other industrial minerals Resource Subtype: Apatite


The fact sheet was created on 29.03.2024

Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
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