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THE ORE DATABASE
Occurence 1804 - 016 Tverrbrennfjellet
(Object Id: 2674)
(Last updated: 10.11.2023)
Location
County: Nordland Municipality: Bodø (1804)
Map 1:50000: Misvær (2029-2) Map 1:250000: Bodø
Coordinate system: EU89-UTM Zone 33
East: 499253 m. North: 7432096 m.
Longitude: 14.9828710 Latitude: 67.0064260
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Resource
Resource Type: Ferroalloys (Cr,Ni,Co,V,Mo,W) Resource Subtype: Nickel
Element(s): Ni Cu Co
Importance
Raw material meaning: Little Importance (reg. 18.02.2015)

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


Mineralization
Genesis: Orthomagmatic formation Form: Lens
Main texture: Structureless Min. distribution: Disseminated (<20 % ore minerals)
Main grain size: Coarse grained (> 3 mm) Main alteration:
Strike/Dip: Direction:
Plunge:
Stratigraphic classification of host rock
Era: Paleozoic Period:
Province: Caledonides
Geotec.unit: Helgeland Nappe Complex
Tectonic complex: Beiarndekket
Igneous complex:
Group: Vensetgruppen Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Pyroxene Major mineral (>10%)
Gangue mineral Amphibole Major mineral (>10%)
Gangue mineral Plagioclase Subordinate mineral (1-10%)
Ore mineral Pyrrhotite Major mineral (>10%)
Ore mineral Pentlandite Major mineral (>10%)
Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Lithology:
Relationship Rock Origin
Host rock gabbro Intrusive
Original rock :Gabbro
Metamorphic facies :Amphibolite

Information(s) in free text format
Free text
The host rock of the mineralization at Tverrbrennfjellet mountain is an approximately 1H0.5km large gabbro body in a granitic to tonalitic country rock. The gabbro contains ultramafic lenses and granitic veins with different orientations. The gabbro has a rusted appearance near the summit where it contains sulphides. The sulphides pyrrhotite, pentlandite, and chalcopyrite are enriched in several lesser irregular lenses of a few decametres length and a few metres wide. Boyd & Nixon 1985 mention contents of 1wt% Ni and 0.5wt% Cu with 2.75-4.4wt% in the pure sulphide. Exploration pits have been blasted in the two richest ore bodies. At UTM coordinates 499280 7432220, there is a 1H1m pit in the hanging contact of an EW running 2m thick granite vein steeply dipping N, with a 1m3 tailings heap. The vein continues for another 20-30m W with a decreasing ore content. The coarse grained gabbro contains pyrrhotite, pentlandite, and chalcopyrite over about 10m width, the richest part where the pit is located. About 20m farther E, another pit 3H2H1m was blasted, having a 3m3 tailings heap. The gabbro is coarse grained with evenly distributed 3-4mm large pyrrhotite grains (sample 05-06). In addition, medium grained gabbro contains disseminated Pyrrhotite. Some 3m E of this pit, a 2m thick NE-SW running granite vein. From there 10m N, a few ultrabasite lenses (08) crop out. At the very down end of the rock wall, at UTM coordinates 499320 7432300 (main pit), a 7H2m and up to 4m deep cut has been driven into a NE-SW running granite vein and 5m into sulphide impregnated gabbro. This gabbro is medium grained and partially richly mineralized (09-11) with locally semi-massive pyrrhotite, pentlandite, and chalcopyrite. Locally, the gabbro has become schistose. About 3m SE for the end of the rock face, another 2H2H2m pit is made into the same mineralization. Altogether, the total tailings amount to 40m3. The mineralization is up to 7-8m wide and 15-20m long. Like said, rusted parts commonly occur in the low-sulphide gabbro, for instance at UTM coordinates 499150 7432000 (01).

Bibliography:
References not to be found in NGU's Reference Archive.:

Fieldsamples
Sample No. Sample type Miscellanrous
NO-TB-17-3 Dump
Sampler: P.M. Ihlen/L.P. Nilsson/...Stored: Løkken
Comment: Pyroxenite with local dense dissemination and intergranular aggregates (1-3 mm) of po ± cp
No. of registrated element analyses = 1
No. of registrated oxide analyses = 1
NO-TB-17-4 Dump
Sampler: P.M. Ihlen/L.P. Nilsson/...Stored: Løkken
Comment: Pyroxenite with 3-8 mm Px crystals surrounded by Am-rim and interstitial po aggregates
No. of registrated element analyses = 1
No. of registrated oxide analyses = 1
NO0549.09 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Grovk. gabbro med po-ptl-cpy-diss.
No. of registrated element analyses = 1
NO0549.10 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Grovk. gabbro med po-ptl-cpy-diss.
No. of registrated element analyses = 1
NO0549.11 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Grovk. gabbro med po-ptl-cpy-diss.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Sample point: Prøvepunkt 1
(Object Id: 4095 16,00,01)
Location
County: Nordland Municipality: Bodø (1804)
Map 1:50000: Misvær (2029-2) Map 1:250000: Bodø
Coordinate system: EU89-UTM Zone 33
East: 499083 m. North: 7431796 m.
Longitude: 14.9789740 Latitude: 67.0037340
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Resource
Resource Type: Ferroalloys (Cr,Ni,Co,V,Mo,W) Resource Subtype: Nickel
Element(s): Ni Cu


Fieldsamples
Sample No. Sample type Miscellanrous
NO0549.01 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Gabbro med litt po-diss.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Locality: Skjerp 1
(Object Id: 3268 16,01,00)
Location
County: Nordland Municipality: Bodø (1804)
Map 1:50000: Misvær (2029-2) Map 1:250000: Bodø
Coordinate system: EU89-UTM Zone 33
East: 499213 m. North: 7432016 m.
Longitude: 14.9819540 Latitude: 67.0057080
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Resource
Resource Type: Ferroalloys (Cr,Ni,Co,V,Mo,W) Resource Subtype: Nickel
Element(s): Ni Cu
Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


Fieldsamples
Sample No. Sample type Miscellanrous
NO0549.02 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Granitt.
No. of registrated element analyses = 1
NO0549.03 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Grovk. gabbro med po-ptl-cpy-diss.
No. of registrated element analyses = 1
NO0549.04 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Grovk. gabbro med po-ptl-cpy-diss.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Locality: Eastern tip
(Object Id: 3269 16,02,00)
Location
County: Nordland Municipality: Bodø (1804)
Map 1:50000: Misvær (2029-2) Map 1:250000: Bodø
Coordinate system: EU89-UTM Zone 33
East: 499233 m. North: 7432016 m.
Longitude: 14.9824130 Latitude: 67.0057080
Show on map
Resource
Resource Type: Ferroalloys (Cr,Ni,Co,V,Mo,W) Resource Subtype: Nickel
Element(s): Ni Cu
Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


Fieldsamples
Sample No. Sample type Miscellanrous
NO-TB-17-11 Bedrock
Sampler: P.M. Ihlen/L.P. Nilsson/...Stored: Løkken
Comment: Olivine-pyroxenite, med-gr, dark green with 1-5 mm Px-xx with Am-rim against interstitial po+py aggreg.
No. of registrated element analyses = 1
No. of registrated oxide analyses = 1
NO0549.05 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Grovk. gabbro med po-ptl-cpy-diss.
No. of registrated element analyses = 1
NO0549.06 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Grovk. gabbro med po-ptl-cpy-diss.
No. of registrated element analyses = 1
NO0549.07 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Middelsk. gabbro med po-ptl-cpy-diss.
No. of registrated element analyses = 1
NO0549.08 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Ultrabasitt.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 1804 - 016 Tverrbrennfjellet

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#
NO-TB-17-11 Bedrock 1090 101 -5 208 3620
NO-TB-17-3 Dump 1170 180 -5 311 9360
NO-TB-17-4 Dump 2010 100 -5 403 11100
NO0549.01 Bedrock 192 9 23 10 80 .1 2.0
NO0549.02 Bedrock 12 3 27 2 4 .1 1.0
NO0549.03 Bedrock 811 20 11 182 1955 .1 21.0
NO0549.04 Bedrock 1127 7 17 192 1788 .1 13.0
NO0549.05 Bedrock 951 19 12 221 3433 .1 2.0
NO0549.06 Bedrock 751 15 14 173 2581 .1 2.0
NO0549.07 Bedrock 667 9 11 137 2091 .1 4.0
NO0549.08 Bedrock 52 61 10 134 558 .1 2.0
NO0549.09 Bedrock 1104 43 14 242 4294 .1 3.0
NO0549.10 Bedrock 2831 18 10 307 5827 .2 1.0
NO0549.11 Bedrock 1896 34 10 709 12199 .1 7.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sb* Bi* S%
NO-TB-17-11 -10 28 3.56
NO-TB-17-3 -10 34 4.97
NO-TB-17-4 -10 68 7.76
NO0549.01 24.0 7.0 40 .2 46 1.00 2 2 .10
NO0549.02 6.0 3.0 77 .2 65 1.00 2 2 .03
NO0549.03 6.0 3.0 37 .2 3 1.00 2 2 1.77
NO0549.04 4.0 5.0 42 .2 17 1.00 2 3 2.41
NO0549.05 6.0 3.0 21 .2 15 1.00 2 2 3.91
NO0549.06 4.0 4.0 26 .2 22 1.00 2 2 2.81
NO0549.07 9.0 7.0 19 .2 3 1.00 2 2 2.55
NO0549.08 3.0 3.0 13 .2 2 1.00 2 2 .19
NO0549.09 4.0 7.0 11 .2 22 1.00 2 2 3.82
NO0549.10 6.0 17.0 8 .2 10 1.00 2 2 6.54
NO0549.11 8.0 11.0 2 .2 16 1.00 2 2 10.61
------------------
Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* Y*
NO-TB-17-11 81 989 12.80 7.0
NO-TB-17-3 76 3750 16.60 5.0
NO-TB-17-4 60 1190 18.60 7.0
NO0549.01 27 72 41 2.05 2.00 5.00 1 70.0
NO0549.02 2 2 25 .24 13.00 5.00 2 5.0
NO0549.03 2 59 228 6.53 2.00 5.00 1 7.0
NO0549.04 11 204 42 5.28 2.00 5.00 1 30.0
NO0549.05 8 127 134 6.39 2.00 5.00 1 16.0
NO0549.06 8 124 107 4.79 2.00 5.00 1 94.0
NO0549.07 8 136 114 4.24 2.00 5.00 1 13.0
NO0549.08 5 123 835 6.70 2.00 5.00 1 6.0
NO0549.09 7 247 486 8.76 2.00 5.00 1 21.0
NO0549.10 22 482 59 8.32 2.00 5.00 1 14.0
NO0549.11 6 155 236 13.72 2.00 5.00 1 16.0
------------------
Sample No. Zr* Nb* La* B* Mg*
NO-TB-17-11 16 -5.00 16
NO-TB-17-3 18 -5.00 18
NO-TB-17-4 21 -5.00 15
NO0549.01 2.00 5
NO0549.02 20.00 9
NO0549.03 2.00 2
NO0549.04 2.00 2
NO0549.05 2.00 2
NO0549.06 2.00 2
NO0549.07 2.00 4
NO0549.08 2.00 5
NO0549.09 2.00 2
NO0549.10 2.00 2
NO0549.11 2.00 2

Oxide analyses
( All values are in % )
Sample No. Sample Type SiO2 Al2O3 TiO2 Fe2O3 MnO MgO CaO
NO-TB-17-11 Bedrock 45.20 3.20 0.32 18.30 0.18 27.10 1.34
NO-TB-17-3 Dump 35.30 3.50 0.21 23.70 0.13 29.10 1.79
NO-TB-17-4 Dump 34.00 3.20 0.33 26.60 0.13 25.50 2.02
------------------
Sample No. Na2O K2O P2O5 Loss Sum
NO-TB-17-11 -0.10 0.03 0.02 2.46 98.00
NO-TB-17-3 0.18 0.07 0.03 3.05 97.00
NO-TB-17-4 0.26 0.12 0.03 4.48 97.00

The fact sheet was created on 05.05.2024
Questions or comments regarding the fact sheet can be emailed to:
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