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THE ORE DATABASE
Occurence 1853 - 009 Nedre Kleven
(Object Id: 2413)
(Last updated: 01.06.2015)

Location
County: Nordland Municipality: Evenes (1853)
Map 1:50000: Astafjorden (1332-2) Map 1:250000: Narvik
Coordinate system: EU89-UTM Zone 33
East: 582532 m. North: 7601596 m.
Longitude: 17.0194790 Latitude: 68.5146300
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Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe
Importance
Raw material meaning: Little Importance (reg. 18.02.2015)

Resources and production
Activity: Mining Reserves:
Operating method: Open pit and underground mining Historical production: 300 thousand tons


Products
Element/product Crude ore grade or quality Reg. date
Fe-total 26 % 28.09.1992

Operations
From - To Activity Comments
1931 - 1931 Core drilling
1931 - 1935 Regular production Company/Institution :Arbeiderselskapet med statsstøtte
1936 - 1939 Regular production Company/Institution :A/S Sydvaranger
2012 - 2014 Geology Company/Institution :NGU

Mineralization
Era: Proterozoic Period: Neoproterozoic
Genesis: Sedex Form: Layer
Main texture: Banded Min. distribution: Massive (>50 % ore minerals)
Main grain size: Medium grained (1-3 mm) Main alteration:
Strike/Dip: 225 / 40 Direction: 260
Plunge: 30
Stratigraphic classification of host rock
Era: Proterozoic Period: Neoproterozoic
Province: Caledonides
Geotec.unit: Seve-Køli Nappe Complex
Tectonic complex: Øvre allokton
Igneous complex:
Group: Bogengruppen Formation: Håfjell jernmalmformasjon

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Amphibole Major mineral (>10%)
Ore mineral Magnetite Major mineral (>10%)
Ore mineral Pyrite Subordinate mineral (1-10%)

Lithology:
Relationship Rock Origin
Unknown Glimmerskifer Sedimentary
Original rock :Greywacke
Metamorphic facies :Amphibolite
Unknown Amfibolitt Extrusive
Original rock :Basalt
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Unknown Primary layering Strike/Dip :225 / 40 Syn-mineralisation ;...Effect :None

Information(s) in free text format
Free text
The Bogen Fe ore field consists of a number of workings over a strike length of c. 6 km. About 1.6 mill.t of magnetite ore was produced from three open pits with associated underground workings (Øvre and Nedre Kleven, Bergvik) between 1906 and 1939 (several periods). The ore occurs in several layers and lenses of semimassive ore, varying in thickness from less than 2 meters and up to c. 10 meters, typically separated by amphibolitic layers often with magnetite impregnation. The total thickness of the mineralized zone varies from c. 10 meters to 100-200 meters. The zone is strongly deformed and is folded into a number of recumbent tight to isoclinals fold structures, which have disrupted the ore layers and increased considerably the thickness in the fold closures. The mineralized zone is situated between calcareous mica schist (structurally below) and calcite marble (structurally above). The ore is generally banded/laminated on mm to cm scale, with alternating quartz, amphibole +/- biotite and magnetite layers. At places the ore contains thin manganese-rich or/and hematite-rich layers, typically in the structurally upper and lower parts, respectively.

Bibliography:
References not to be found in NGU's Reference Archive.:
Søvegjarto, U. 1978: Bogen jernmalmfelt. Sluttrapport geologi. Int. rapp. Rana Gruber A/S. 10 sider, 51 bilag.

Fieldsamples
Sample No. Sample type Miscellanrous
NO0271.01 Bedrock
Sampler: Sørdal, T./...Stored: Løkken
Comment: Magnetittmalm, div.
No. of registrated element analyses = 1
NO0271.02 Bedrock
Sampler: Sørdal, T./...Stored: Løkken
Comment: Magnetittmalm, massiv.
No. of registrated element analyses = 1
NO0271.03 Bedrock
Sampler: Sørdal, T./...Stored: Løkken
Comment: Båndet magnetittmalm.
No. of registrated element analyses = 1
NO0271.04 Bedrock
Sampler: Sørdal, T./...Stored: Løkken
Comment: Rusten magnetittmalm, med tynne sulfidbånd.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:


Analyse Results
from
Deposit Area 1853 - 009 Nedre Kleven

Element analyses

( *=parts pr. million, #=parts pr.billion, Negative values means below detection limit value.)
Sample No. Sample Type Cu* Zn* Pb* Co* Ni* Ag* Au#
NO0271.01 Bedrock 5 31 2 18 9 .1 6.0
NO0271.02 Bedrock 2 41 2 21 10 .1 2.0
NO0271.03 Bedrock 3 33 2 17 8 .1 1.0
NO0271.04 Bedrock 116 40 2 24 11 .2 4.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sb* Bi* S%
NO0271.01 3.0 3.0 2 .2 4 1.00 3 2 .02
NO0271.02 3.0 3.0 2 .2 63 1.00 2 2 .01
NO0271.03 3.0 3.0 2 .2 10 1.00 2 5 .02
NO0271.04 3.0 3.0 2 .2 35 1.00 2 2 4.58
------------------
Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* La*
NO0271.01 43 24 194 26.36 2.00 5.00 1 77.0 14.00
NO0271.02 38 20 693 22.25 4.00 5.00 1 57.0 16.00
NO0271.03 40 25 167 24.26 3.00 5.00 1 72.0 13.00
NO0271.04 38 20 190 23.46 2.00 5.00 1 35.0 10.00
------------------
Sample No. B*
NO0271.01 2
NO0271.02 2
NO0271.03 2
NO0271.04 2


The fact sheet was created on 18.10.2021

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