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THE ORE DATABASE
Occurence 5059 - 029 Blomsbakken
(Object Id: 4344)
(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: 536394 m. North: 6993485 m.
Longitude: 9.7202300 Latitude: 63.0690370
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Kis Cu
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

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


Operations
From - To Activity Comments
1984 - 1984 Geology Company/Institution :NTH
Siv Kjeldsen; Diplomoppgave

Mineralization
Era: Paleozoic Period: Ordovician
Genesis: Volcex Form: Lens
Main texture: Structureless Min. distribution: Disseminated (<20 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration: Chloritisation
Strike/Dip: 290 / 60 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 Major mineral (>10%)
Gangue mineral Mica Subordinate mineral (1-10%)
Gangue mineral Feldspar Subordinate mineral (1-10%)
Ore mineral Pyrrhotite Major mineral (>10%)
Ore mineral Chalcopyrite Subordinate mineral (1-10%)
Ore mineral Pyrite Accessory mineral (<1%)

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

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Schistosity Strike/Dip :280 / 55 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
Dette er et lite skjerp i bunnen av en brattskrent hvor større blokker har rast ut. En to m bred sulfidmineralisert sone finnes langs kontakten mellom to grønnsteiner; mulig lavastømmer. Mineraliseringen består av svak disseminasjon av magnetkis, pyritt og kobberkis i klorittrik grønnstein og i tynne kvartslinser og -årer i denne.

Bibliography:
From NGU's Reference Archive:
Kjeldsen, Siv , 1984
En undersøkelse av sulfidmineraliseringer i Grefstadfjell og Resfjellområdene, Løkkenfeltet.
;NTH Bergavd.;AVHANDLING

Fieldsamples
Sample No. Sample type Miscellanrous
JS-M1923 Bedrock
Sampler: J.S. Sandstad/...Stored: Løkken/...Size(kg): 2
Comment: Weak pyrite-chalcopyrite dissemination in chlorized greenstone
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 5059 - 029 Blomsbakken

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-M1923 Bedrock 1800 153 -1 74 20 .3 -1.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sn* Sb* Bi*
JS-M1923 -5.0 -1.0 16 .2 10 7.80 0 0 0
------------------
Sample No. Se* Ga* Ge* In* S% V* Cr* Mn* Fe%
JS-M1923 3.00 22.40 0.26 0.18 .86 125 47 1820 16.50
------------------
Sample No. Th* U* W* Rb* Sr* Y* Zr* Nb* Ta*
JS-M1923 0.28 0.10 -0 1.6 6.9 63.1 20 3.40 0.31
------------------
Sample No. Cs* La* Ce* Li* Be* Na* Mg* Al* P*
JS-M1923 1.03 5.00 18.00 4 0 0 2 5 1570
------------------
Sample No. K * Ca* Sc* Ti* Te* Hf* Re* Tl*
JS-M1923 0 1 27.40 1 0.05 0.80 5 0

The fact sheet was created on 04.05.2024
Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
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