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THE ORE DATABASE
Occurence 5052 - 008 Rossvika
(Object Id: 189)
(Last updated: 15.12.1998)
Location
County: Trøndelag Municipality: Leka (5052)
Map 1:50000: Austra (1725-2) Map 1:250000: Vega
Coordinate system: EU89-UTM Zone 32
East: 631960 m. North: 7219362 m.
Longitude: 11.8065700 Latitude: 65.0715660
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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: Exploration Reserves:
Operating method: Historical production:


Mineralization
Era: Proterozoic Period:
Genesis: Orthomagmatic formation Form: Lens
Main texture: Banded Min. distribution: Disseminated (<20 % ore minerals)
Main grain size: Medium grained (1-3 mm) Main alteration:
Strike/Dip: 250 / 80 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Proterozoic Period:
Province:
Geotec.unit:
Tectonic complex:
Igneous complex:
Group: Formation:

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

Lithology:
Relationship Rock Origin
Host rock Granodioritic gneiss Intrusive
Original rock :Granodiorite
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Foliation Strike/Dip :250 / 80 Post-mineralisation ;...Effect :None

Information(s) in free text format
Free text
Det er ikke skjerpet på mineraliseringen. Den skjæres av veien og er blottet i ca 15 m lengde. Bergarten i området er middels- til grovkornet granodiorittisk gneis, delvis migmatittisk, med slirer og bånd. Mineraliseringen er opptil 0.5 m mektig og opptrer stratabundet i forhold til gneisens bånding og foliasjon. Sulfidene (ca. 5 % svovelkis, noe magnetkis og spor av kobberkis og sinkblende) opptrer som disseminasjon og i smale striper i gneis som skiller seg ut fra heng og ligg ved lavere hornblende-innhold (granittisk sammensetning, prøve 02). Deler av mineraliseringen fører cm-store feltspatslirer (01).

Fieldsamples
Sample No. Sample type Miscellanrous
NT0191.01 Bedrock
Sampler: Wilberg, R.
Comment: Medium grained, granitic gneiss with sulphide dissemination.
No. of registrated element analyses = 1
NT0191.02 Bedrock
Sampler: Wilberg, R.
Comment: Medium grained, granitic gneiss with sulphide dissemination.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 5052 - 008 Rossvika

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#
NT0191.01 Bedrock 111 71 6 14 12 .5 12.0
NT0191.02 Bedrock 74 66 12 14 15 1.1 20.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sb* Bi* S%
NT0191.01 3.0 2.0 2 .6 92 65.00 2 6 .87
NT0191.02 1.0 1.0 7 .4 40 35.00 2 25 2.14
------------------
Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* La*
NT0191.01 44 20 327 2.87 17.00 5.00 1 10.0 21.00
NT0191.02 44 38 251 3.70 8.00 5.00 1 15.0 14.00
------------------
Sample No. B*
NT0191.01 4
NT0191.02 6

The fact sheet was created on 03.11.2025
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