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THE ORE DATABASE
Occurence 5059 - 041 Brannåsen
(Object Id: 4538)
(Last updated: 13.04.2020)
Location
County: Trøndelag Municipality: Orkland (5059)
Map 1:50000: Hølonda (1521-2) Map 1:250000: Trondheim
Coordinate system: EU89-UTM Zone 32
East: 543340 m. North: 7000351 m.
Longitude: 9.8594820 Latitude: 63.1298880
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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: Pitting Reserves:
Operating method: Historical production:


Operations
From - To Activity Comments
1954 - 1954 Geophysics Company/Institution :NGU
Turam
1980 - 1980 Geology Company/Institution :T. Grenne
1981 - 1981 Geophysics Company/Institution :Orkla Industrier A/S
VLF, magnetometry
1981 - 1981 Core drilling Company/Institution :Orkla Industrier A/S
4 holes

Mineralization
Era: Paleozoic Period: Ordovician
Genesis: Volcex Form: Layer
Main texture: Banded Min. distribution: Massive (>50 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration: Chloritisation
Strike/Dip: 30 / 45 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Paleozoic Period: Ordovician
Province: Caledonides
Geotec.unit: Trondheim Nappe Complex
Tectonic complex: Støren Nappe
Igneous complex:
Group: Støren Group Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Chlorite Subordinate mineral (1-10%)
Ore mineral Pyrite Major mineral (>10%)

Lithology:
Relationship Rock Origin
Wall rock Greenschist Extrusive
Original rock :Basalt
Metamorphic facies :Greenschist

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Wall rock Foliation Strike/Dip :39 / 45 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
Et lite skjerp ligger på toppen av åsen vest for Stormyra. Kun mindre røsking er gjort. En vasskishorisont som er minst 60 cm mektig overlagres av skifrig grønnstein. Den består linser og tynne lag med svært finkornet pyritt og spredte middelskornet pyritt-krystaller i veksling med mørke glimmer-/klorittrike laminer. Tidligere kartlegging viser at vasskisen er tilknyttet en cherthorisont med foldeombøyning nord for åsen (Grenne 1982). Skjerpet ligger på flanken av denne folden.

Bibliography:
References not to be found in NGU's Reference Archive.:
Grenne, T., 1982: Geological, geophysical and diamond drilling in the Brannåsen area. Report Orkla Industrier A/S LV 10 (BV 1936)

Fieldsamples
Sample No. Sample type Miscellanrous
JS-M1935 Bedrock
Sampler: J.S. Sandstad/...Stored: Løkken/...Size(kg): 2
Comment: Pyrite, very fine grained, layer and lenses in dark matrix ('vasskis')
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Locality: Brannåsen SV
(Object Id: 37196 41,01,00)
Location
County: Trøndelag Municipality: Orkland (5059)
Map 1:50000: Hølonda (1521-2) Map 1:250000: Trondheim
Coordinate system: EU89-UTM Zone 32
East: 543346 m. North: 7000331 m.
Longitude: 9.8595870 Latitude: 63.1297160
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Sulphides
Element(s): Kis
Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Chlorite Subordinate mineral (1-10%)
Ore mineral Pyrite Major mineral (>10%)

Lithology:
Relationship Rock Origin
Wall rock Chert Sedimentary
Original rock :Exhalite
Metamorphic facies :Greenschist

Information(s) in free text format
Free text
En liten blotning og flere større blokker viser at vasskisen kan være minst 1 m mektig. Mindre blokker av gråhvit chert finnes også i lokaliteten, men det er ingen andre blotninger i nærheten.

Bibliography:
References not to be found in NGU's Reference Archive.:
Grenne, T. 1982. Geological, geophysical and diamond drilling investigations in the Brannåsen area. BV 1936, 10s. + vedlegg

Fieldsamples
Sample No. Sample type Miscellanrous
JS-M1936 Dump
Sampler: J.S. Sandstad/...Stored: Løkken/...Size(kg): 2
Comment: Pyrite, very fine grained, layer and lenses in dark matrix ('vasskis')
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 5059 - 041 Brannåsen

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#
JS-M1935 Bedrock 556 397 16 20 88 .4 6.0
JS-M1936 Dump 363 594 9 15 88 .3 14.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sn* Sb* Bi*
JS-M1935 -5.0 4.0 18 1.4 10 63.00 1 2 0
JS-M1936 5.0 3.0 211 1.9 60 10.20 1 3 0
------------------
Sample No. Se* Ga* Ge* In* S% V* Cr* Mn* Fe%
JS-M1935 5.00 9.14 0.41 0.08 10.00 181 47 1000 30.80
JS-M1936 7.00 10.95 0.62 0.18 10.00 217 61 1440 29.20
------------------
Sample No. Th* U* W* Rb* Sr* Y* Zr* Nb* Ta*
JS-M1935 3.90 10.50 0 0.3 23.1 20.8 52 4.20 0.29
JS-M1936 6.30 8.60 0 5.5 21.0 35.6 65 5.90 0.40
------------------
Sample No. Cs* La* Ce* Li* Be* Na* Mg* Al* P*
JS-M1935 0.30 8.50 21.70 10 0 0 2 3 590
JS-M1936 0.63 35.90 67.70 15 0 0 3 4 1270
------------------
Sample No. K * Ca* Sc* Ti* Te* Hf* Re* Tl*
JS-M1935 0 1 8.60 0 0.16 1.30 40 0
JS-M1936 0 1 9.90 0 0.15 1.60 18 0

The fact sheet was created on 03.05.2024
Questions or comments regarding the fact sheet can be emailed to:
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