Norsk versjon
THE ORE DATABASE
Occurence 1832 - 011 Vekthaugkråa
(Object Id: 2805)
(Last updated: 29.02.2000)

Location
County: Nordland Municipality: Hemnes (1832)
Map 1:50000: Korgen (1927-2) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 453652 m. North: 7334367 m.
Longitude: 13.9737180 Latitude: 66.1263020
Show on map

Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Sulphides
Element(s): Kis
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

Resources and production
Activity: Pitting Reserves:
Operating method: Historical production: ,01 thousand tons


Mineralization
Era: Proterozoic Period: Neoproterozoic
Genesis: Sedex Form: Layer
Main texture: Banded Min. distribution: Disseminated (<20 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration:
Strike/Dip: 60 / 15 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Proterozoic Period: Neoproterozoic
Province: Caledonides
Geotec.unit: Rødingsfjell Nappe Complex
Tectonic complex: Øverste allokton
Igneous complex:
Group: Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Potassic feldspar Major mineral (>10%)
Gangue mineral Plagioclase Major mineral (>10%)
Gangue mineral Biotite Subordinate mineral (1-10%)
Gangue mineral Muscovite Accessory mineral (<1%)
Ore mineral Pyrrhotite Major mineral (>10%)
Ore mineral Pyrite Major mineral (>10%)
Ore mineral Chalcopyrite Subordinate mineral (1-10%)
Ore mineral Galena Subordinate mineral (1-10%)
Ore mineral Sphalerite Subordinate mineral (1-10%)

Lithology:
Relationship Rock Origin
Host rock Granatglimmerskifer Sedimentary
Original rock :Greywacke
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Foliation Strike/Dip :60 / 15 Post-mineralisation ;...Effect :None
Host rock Primary layering Strike/Dip :60 / 15 Syn-mineralisation ;...Effect :Controls

Information(s) in free text format
Free text
I en skrent er det skjerpet, og tippen inneholder 30 m3. Bergarten er granatglimmergneis (prøve 08), noe karbonatholdig. Det er to sulfidimpregnerte lag i gneisen. Sulfidmineralene er, som gangbergarten finkornet, og svært finfordelt - og derfor vanskelige å identifisere. Magnetkis og svovelkis er dominerende, sammen med noe kobberkis. Identifisering av blyglans og sinkblende er usikker. De mineraliserte lagene inneholder totalt ca. 10 % sulfidmineraler. Det nederst mineraliserte laget (01 og 02) er 20-30 cm mektig. Det øverste er ca. 1 m (04-07). Mellomliggende er 1 m mektig karbonatholdig granatglimmergneis med litt sulfid-disseminasjon (03). Gangbergarten er lys grå kvarts-feltspatgneis med noe biotitt og muskovitt. Den er markert mer finkornet enn sidebergarten, med mindre innhold av glimmer og uten granat. I tillegg til de to mineraliserte lagene er det noen smale lag både i heng og ligg. Endresen (1972) oppgir at mineraliseringene fører gull i tillegg til kis og kobberkis.

Bibliography:
References not to be found in NGU's Reference Archive.:
Endresen, B.A. 1972: Sulfidlokaliteter i Rana - kort oversikt med forsøk på kvalitativ kartlegging. Upubl. rapp.

Fieldsamples
Sample No. Sample type Miscellanrous
NO0691.01 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Finkornet sulfiddiss. gneis (øverste horisont).
No. of registrated element analyses = 1
NO0691.02 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Finkornet sulfiddiss. gneis (øverste horisont).
No. of registrated element analyses = 1
NO0691.03 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Karbonatholdig granatglimmergneis med litt sulfid (fra sideberg mellom mineraliseringene).
No. of registrated element analyses = 1
NO0691.04 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Finkornet sulfiddiss. gneis (øverste horisont).
No. of registrated element analyses = 1
NO0691.05 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Finkornet sulfiddiss gneis (øverste horisont).
No. of registrated element analyses = 1
NO0691.06 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Finkornet sulfid-diss. gneis (øverste horisont).
No. of registrated element analyses = 1
NO0691.07 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Finkornet sulfiddiss. gneis (øverste horisont).
No. of registrated element analyses = 1
NO0691.08 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Granatglimmergneis fra liggen (1 m under mineraliseringen).
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:


Analyse Results
from
Deposit Area 1832 - 011 Vekthaugkråa

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#
NO0691.01 Bedrock 74 118 9 25 73 .8 2.0
NO0691.02 Bedrock 133 21 5 13 27 .6 4.0
NO0691.03 Bedrock 73 99 10 25 37 .2 15.0
NO0691.04 Bedrock 63 48 11 14 54 .9 10.0
NO0691.05 Bedrock 128 222 27 37 140 1.3 40.0
NO0691.06 Bedrock 127 180 16 23 71 1.2 7.0
NO0691.07 Bedrock 91 103 23 25 69 .8 17.0
NO0691.08 Bedrock 60 112 3 15 6 .1 16.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sb* Bi* S%
NO0691.01 5.0 8.0 2 .8 74 6.00 2 2 2.39
NO0691.02 6.0 3.0 5 .2 67 14.00 2 2 1.50
NO0691.03 5.0 7.0 2 .2 459 1.00 2 5 .47
NO0691.04 3.0 6.0 3 .2 35 16.00 2 3 1.89
NO0691.05 9.0 2.0 2 4.5 17 33.00 3 3 2.79
NO0691.06 12.0 4.0 2 2.6 31 26.00 2 2 1.85
NO0691.07 5.0 1.0 3 1.1 35 17.00 4 2 1.26
NO0691.08 11.0 1.0 2 .2 781 1.00 2 5 .29
------------------
Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* La*
NO0691.01 146 78 482 3.27 13.00 5.00 1 29.0 8.00
NO0691.02 53 22 127 2.23 7.00 5.00 1 9.0 4.00
NO0691.03 121 50 320 4.97 13.00 5.00 1 9.0 28.00
NO0691.04 31 15 250 3.41 11.00 5.00 2 108.0 18.00
NO0691.05 132 30 214 2.82 6.00 7.00 1 120.0 8.00
NO0691.06 250 45 246 3.22 7.00 5.00 2 83.0 7.00
NO0691.07 76 22 266 3.02 10.00 5.00 1 136.0 15.00
NO0691.08 78 3 218 4.88 16.00 5.00 1 17.0 17.00
------------------
Sample No. B*
NO0691.01 2
NO0691.02 2
NO0691.03 5
NO0691.04 3
NO0691.05 2
NO0691.06 2
NO0691.07 3
NO0691.08 6


The fact sheet was created on 18.10.2021

Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
Copyright © 2021 Geological Survey of Norway