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THE ORE DATABASE
Occurence 4625 - 001 Tverrberget
(Object Id: 4724)
(Last updated: 21.03.1997)
Location
County: Vestland Municipality: Austevoll (4625)
Map 1:50000: Marstein (1115-3) Map 1:250000: Bergen
Coordinate system: EU89-UTM Zone 32
East: 279117 m. North: 6659391 m.
Longitude: 5.0369050 Latitude: 60.0122120
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Resource
Resource Type: Ferroalloys (Cr,Ni,Co,V,Mo,W) Resource Subtype: Nickel
Element(s): Kis Cu
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


Mineralization
Era: Paleozoic Period: Ordovician
Genesis: Orthomagmatic formation Form: Lens
Main texture: Structureless Min. distribution: Massive (>50 % ore minerals)
Main grain size: Medium grained (1-3 mm) Main alteration:
Strike/Dip: 38 / 80 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Paleozoic Period: Ordovician
Province:
Geotec.unit:
Tectonic complex:
Igneous complex: Sunnhordland Batholith
Group: Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Plagioclase Subordinate mineral (1-10%)
Gangue mineral Hornblende Subordinate mineral (1-10%)
Ore mineral Pyrrhotite Major mineral (>10%)
Ore mineral Chalcopyrite Accessory mineral (<1%)

Lithology:
Relationship Rock Origin
Host rock Gabbro Intrusive
Original rock :Gabbro

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Shear plane Strike/Dip :38 / 80 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
Skjerpet ligger 80-100 m fra havet, men det er vanskelig å se derfra. Der er utsprengt ca 2 m3. Den mineraliserte sonen har orientering 38°/80°S. Det ses nesten ikke sulfider i fast fjell, sulfidlaget har vel neppe hatt en utstrekning større enn 3 m og en tykkelse på høyst 10 cm. Malmen ligner den fra Fugløy, d.v.s. massiv magnetkis som inneholder litt kobberkis eller en skifrig gabbroid bergart med litt magnetkis og 1-2% kobberkis som sitter på smale sprekker. Mineraliseringen er nok likvidmagmatisk.

Fieldsamples
Sample No. Sample type Miscellanrous
HO0035.01 Bedrock
Sampler: Wulff, P./...Stored: Løkken
Comment: Massiv po med en kornstørrelse på 1 mm, inneholder << 1 % cpy.
No. of registrated element analyses = 1
HO0035.02 Bedrock
Sampler: Wulff, P./...Stored: Løkken
Comment: Malmfragm. Massiv po eller cpy og po i skifrig gabbroid bergart.
No. of registrated element analyses = 1
HO0035.03 Bedrock
Sampler: Wulff, P./...Stored: Løkken
Comment: Malmfragm. Massiv po eller cpy og po i skifrig gabbroid bergart.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 4625 - 001 Tverrberget

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#
HO0035.01 Bedrock 2122 32 3 1043 5756 1.2 9.0
HO0035.02 Bedrock 3328 35 6 797 4734 1.5 19.0
HO0035.03 Bedrock 3797 35 7 749 4554 1.3 7.0
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Sample No. Pt# Pd# Rh# As* Cd* Ba* Mo* Sb* Bi*
HO0035.01 -3.0 32.0 -5.0 13 -.2 16 92.00 -2 -2
HO0035.02 7.0 10.0 -5.0 26 -.2 14 46.00 -2 -2
HO0035.03 224.0 14.0 -5.0 16 -.2 13 34.00 2 -2
------------------
Sample No. S% V* Cr* Mn* Fe% Th* U* W* Sr*
HO0035.01 24.02 29 113 67 35.87 2.00 -5.00 -2 9.0
HO0035.02 21.76 22 93 125 26.09 2.00 -5.00 -2 4.0
HO0035.03 20.61 30 117 162 25.71 -2.00 -5.00 -2 9.0
------------------
Sample No. La* B*
HO0035.01 1.00 4
HO0035.02 1.00 -3
HO0035.03 1.00 3

The fact sheet was created on 26.10.2025
Questions or comments regarding the fact sheet can be emailed to:
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