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THE ORE DATABASE
Occurence 5028 - 011 Brannberget
(Object Id: 4446)
(Last updated: 08.08.2022)
Location
County: Trøndelag Municipality: Melhus (5028)
Map 1:50000: Trondheim (1621-4) Map 1:250000: Trondheim
Coordinate system: EU89-UTM Zone 32
East: 566017 m. North: 7017303 m.
Longitude: 10.3159730 Latitude: 63.2785650
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Sulphides
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: Volcex Form: Irregular
Main texture: Structureless Min. distribution: Disseminated (<20 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration: Silicification
Strike/Dip: 200 / 85 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Paleozoic Period: Ordovician
Province: Caledonides
Geotec.unit: Trondheim Nappe Complex
Tectonic complex: LVB ofiolitt fragmenter
Igneous complex:
Group: Formation: Bymarkgrønnsteinen

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

Lithology:
Relationship Rock Origin
Host rock Metagabbro Intrusive
Original rock :Gabbro
Metamorphic facies :Greenschist

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Joints/Fractures Strike/Dip :200 / 85 Syn-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
Forekomsten består av en liten, halvringformet tunell som er sprengt ut i bunnen av en 4 m høy østvendt skrent nær en tursti vest for Lodda/Loddbekken. Avstanden mellom tunellåpningene er ca. 5 m. Inngangen i sør er opptil 2 m bred og 1,5 m høy, mens den nordlige inngangen er mye mindre. Den er anlagt i en rustfarget sone i silisifisert metagabbro. Sulfidmineraliseringene består disseminasjon og aggregater av svovelkis og mindre mengder kobberkis. En prøve inneholder 0,2 % kobber.

Fieldsamples
Sample No. Sample type Miscellanrous
Brannberget-1 Bedrock
Sampler: J.S.Sandstad/...Stored: Løkken/...Size(kg): 2
Comment: Disseminated fine-grained pyrite+chalcopyrite in silicified gabbro
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 5028 - 011 Brannberget

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#
Brannberget-1 Bedrock 1930 48 1 22 10 .7 16.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sn* Sb* Bi*
Brannberget-1 -5.0 1.0 42 .1 280 2.11 1 0 0
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Sample No. Se* Ga* Ge* In* S% V* Cr* Mn* Fe%
Brannberget-1 3.00 23.20 0.05 0.26 1.16 10 14 501 3.73
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Sample No. Th* U* W* Rb* Sr* Y* Zr* Nb* Ta*
Brannberget-1 3.09 0.70 0 13.7 37.4 128.5 93 5.70 0.44
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Sample No. Cs* La* Ce* Li* Be* Na* Mg* Al* P*
Brannberget-1 0.35 20.70 59.20 3 1 32400 1700 58300 60
------------------
Sample No. K * Ca* Sc* Ti* Te* Hf* Re* Tl*
Brannberget-1 8900 2900 4.40 970 0.08 3.50 0 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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