Norsk versjon | |||||
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 |
Show on map |
|
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 |
|
|||||
NO0799.01 | Bedrock |
|
|||||
NO0799.02 | Bedrock |
|
|||||
NO0799.03 | Bedrock |
|
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 |
Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
Copyright © 2024 Geological Survey of Norway |