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THE ORE DATABASE
Occurence 1824 - 029 Eiterådalen III
(Object Id: 2902)
(Last updated: 28.04.2020)

Location
County: Nordland Municipality: Vefsn (1824)
Map 1:50000: Eiterådalen (1826-2) Map 1:250000: Mosjøen
Coordinate system: EU89-UTM Zone 33
East: 414644 m. North: 7279300 m.
Longitude: 13.1463840 Latitude: 65.6243780
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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: Test mining Reserves:
Operating method: Underground mining Historical production: ,08 thousand tons


Operations
From - To Activity Comments
1908 - 1908 Geophysics

Mineralization
Era: Paleozoic Period:
Genesis: Sedex Form: Layer
Main texture: Banded Min. distribution: Semi-massive (20-50 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration: Epidotisation
Strike/Dip: 180 / 85 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Paleozoic Period:
Province: Caledonides
Geotec.unit: Helgeland Nappe Complex
Tectonic complex: Øverste allokton
Igneous complex:
Group: Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Epidote Major mineral (>10%)
Gangue mineral Amphibole Major mineral (>10%)
Gangue mineral Quartz Subordinate mineral (1-10%)
Gangue mineral Garnet Subordinate mineral (1-10%)
Gangue mineral Pyroxene Subordinate mineral (1-10%)
Gangue mineral Potassic feldspar Subordinate mineral (1-10%)
Gangue mineral Plagioclase Subordinate mineral (1-10%)
Gangue mineral Apatite Accessory mineral (<1%)
Ore mineral Magnetite Major mineral (>10%)
Ore mineral Hematite Accessory mineral (<1%)

Lithology:
Relationship Rock Origin
Wall rock granatglimmergneis Sedimentary
Original rock :Greywacke
Metamorphic facies :Amphibolite
Wall rock amfibolitt Extrusive
Original rock :Basalt
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Foliation Strike/Dip :180 / 85 Post-mineralisation ;...Effect :None

Information(s) in free text format
Free text
Den vestlige malmsone kan iflg. Stolz (1908) følges fra Øvrefors sørover til Velfjordskardelva, en strekning på 11km. Mektighetene er mer varierende enn ved den østlige malmsonen. Over lange strekninger er den bare 3-5m. Stedvis utvider den seg til 15-20m. Jernformasjonen har kalkspatmarmor i ligg og kvartsittisk gneis og glimmergneis i heng. Eneste sted hvor skjerp ble funnet er nord for Holmen, UTM 414690 7279510 (Kjerringrokkhola). Her er en 7m lang stoll drevet mot vest. Den er drevet gjennom 6m mektig båndet jernmalm (båndet magnetitt-førende epidot-hornblendeskifer)(02). Stollen er drevet inn til en granittpegmatitt. I jernformasjonens ligg opptrer 2-3m mektig finkornet amfibolitt. Under denne er granatglimmergneis. I jernformasjonens liggkontakt mot amfibolitten er det endel svovelkis-disseminasjon (opptil 5mm store krystaller) over 10cm mektighet (03). Ellers i jernmalmen er det ikke synlig svovelkis. Jernmalmen inneholder flere uholdige og svakt magnetitt-disseminerte bånd. 01 er gjennomsnittsprøve av jernmalmen.

Bibliography:
From NGU's Reference Archive:
Stoltz, E. , 1911
Eiteraadalens jernfelter.
;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 2480;11 pages
Abstract:
Rapporten beskrivver en 8 dagers undersøkelse av Eiterådalens jernfelt og gir innledningsvis en almindelig oversikt over beliggenhet og topografi. Malmsonene ligger i pressede gneisbergarter og er lite avdekket. Malmmineraliseringen er magnetitt og beskrives som oppredningsmalm. Malmsonene er fulgt opp med magnetometer og det er gitt en detaljert beskrivelse av de enkelte malmsoner. På grunnlag av de utførte undersøkelsene er det foretatt malmberegninger som konkluderer med videre undersøkelser.

Kollung, Sigbjørn , 1967
Geologiske undersøkelser i sørlige Helgeland og nordlige Namdal.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.254;1-95 + ka pages
Abstract:
Cambro-Silurian rocks with large intrusive masses cover most of the area. In the south-westernmost part there are also deeper lying rocks. This part is referred to as the basal gneiss region, while the rest of the area is called the Nordland syncline. In the basal gneiss region there are 3 distinct stratigraphic units: 1. Basal gneisses of supposed Pre-cambrian age. 2. Lower Cambro-Silurian division: micaceous gneisses. 3. Upper Cambro-Silurian division: lime-silicate gneisses with amphibolites and micaceous gneisses, the greater part of which is dark, rather basic and transitional to hornblende-bearing gneiss. Locally also crystalline lilmestone. The three rock units in the basal gneiss region are intensly folded together, and the boundaires between them are concordant. It is thus clear that the basal gneiss has been strongly influenced by the Caledonien orogeny. Steeplimbed, isoclinal folds are most common, but some well-developed synclines and anticlines are present. The greater part of the region has a strike direction ENE to NE. In the northernmost part the fold axes have a northerly plunge. At Tenfjord lime-slicate gneisses are thrust towards the basal gneiss.The northern and greater part of the Nordland has an approximate synform.

Fieldsamples
Sample No. Sample type Miscellanrous
EI-3-B Bedrock
Sampler: P.M. Ihlen
Comment: Tynnb†ndet gr†gr›nn mt-kalksilikat og gr† kvarts-mt malm
No. of registrated element analyses = 1
No. of registrated oxide analyses = 1
NO0799.01 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Gjennomsnittsprøve - båndet jernmalm.
No. of registrated element analyses = 1
NO0799.02 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Båndet jernmalm.
No. of registrated element analyses = 1
NO0799.03 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Amfibolitt med mt-py-diss.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:


Analyse Results
from
Deposit Area 1824 - 029 Eiterådalen III

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#
EI-3-B Bedrock 4 26 2 12 13 -.5
NO0799.01 Bedrock 116 50 80 15 15 .8 4.0
NO0799.02 Bedrock 62 50 40 18 17 .7 4.0
NO0799.03 Bedrock 222 52 10 17 14 .1 5.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sn* Sb* Bi*
EI-3-B 1 298 0.30 3
NO0799.01 3.0 3.0 2 .6 13 1.00 3 7
NO0799.02 3.0 3.0 2 .4 6 1.00 7 2
NO0799.03 3.0 3.0 2 .2 34 1.00 2 2
------------------
Sample No. Se* Ga* S% V* Cr* Mn* Fe% Th* U*
EI-3-B -0.50 10.20 96 5.60 1.10
NO0799.01 .10 45 26 538 13.83 4.00 5.00
NO0799.02 .04 50 31 356 20.26 4.00 8.00
NO0799.03 .63 68 40 488 14.30 3.00 5.00
------------------
Sample No. W* Rb* Sr* Y* Zr* Nb* Ta* Cs* La*
EI-3-B -1 43.3 496.7 22.0 118 9.50 0.60 0.50 25.60
NO0799.01 1 76.0 10.00
NO0799.02 2 45.0 10.00
NO0799.03 1 105.0 15.00
------------------
Sample No. Ce* Pr* Nd* Sm* Eu* Gd* Tb* Dy* Ho*
EI-3-B 52.20 5.87 23.10 4.75 1.00 4.43 0.70 4.07 0.88
NO0799.01
NO0799.02
NO0799.03
------------------
Sample No. Er* Tm* Yb* Lu* B* Be* Hf*
EI-3-B 2.53 0.37 2.52 0.38 3 3.00
NO0799.01 2
NO0799.02 2
NO0799.03 4

Oxide analyses

( All values are in % )
Sample No. Sample Type SiO2 Al2O3 TiO2 Fe2O3 MnO MgO CaO
EI-3-B Bedrock 43.30 7.45 0.58 28.40 0.50 4.35 12.70
------------------
Sample No. Na2O K2O P2O5 Loss Sum
EI-3-B 0.87 1.33 0.33 -0.27 100.00


The fact sheet was created on 29.03.2024

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