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THE ORE DATABASE
Occurence 1573 - 005 Brettingen
(Object Id: 4626)
(Last updated: 27.03.2020)
Location
County: Møre og Romsdal Municipality: Smøla (1573)
Map 1:50000: Smøla (1321-1) Map 1:250000: Kristiansund
Coordinate system: EU89-UTM Zone 32
East: 459840 m. North: 7032503 m.
Longitude: 8.1955870 Latitude: 63.4187980
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Fe
Importance
Raw material meaning: Little Importance (reg. 18.02.2015)

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


Mineralization
Era: Paleozoic Period: Ordovician
Genesis: Volcex Form: Lens
Main texture: Banded Min. distribution: Semi-massive (20-50 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration: Chloritisation
Strike/Dip: Direction:
Plunge:
Stratigraphic classification of host rock
Era: Paleozoic Period: Ordovician
Province:
Geotec.unit:
Tectonic complex:
Igneous complex:
Group: Formation:

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

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

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Wall rock Primary layering Strike/Dip :117 / 55 Syn-mineralisation ;...Effect :Controls

Information(s) in free text format
Free text
Mineraliseringene ligger på norsida av øya Brettingen. Berggrunnen på øya domineres av grønne øg grågrønne finkornete grønnsteiner med antatt basaltisk til andesittisk sammensetning. I tillegg opptrer flere typer ganger, gjerne feltspat porfyriske. Den stratiforme mineraliseringene finnes i et 30 m langt og 3 m bredt øst-vest orientert søkk. Mindre røsking er foretatt på små linser av båndet jern-malm og er opptil 1 m mektige. I tillegg er mindre sprengninsarbeider utført langs mindre rustsoner (10-30 cm brede) som dels er noe forskifret og fører tynne (1-2 cm) kalkspat årer. Svovelkis og mindre mengder kobberkis og magnetkis opptrer disseminert rundt en sentral magnetitt-svovelkis rik sone.

Bibliography:
From NGU's Reference Archive:
Gautneb, Håvard; Roberts, David , 1989
Geology and petrochemistry of the Smøla-Hitra Batholith, Central Norway.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU Bulletin; No.416;1-24 pages
Abstract:
The plutonic rocks which compose the Smøla-Hitra Batholith (SHB) cover an exposed area of c.1000 km² and intrude folded, Arenig-Llanvirn, low-grade meta-sedimentary and bimodal metavolcanic rocks and higher-grade polydeformed gneisses of probable Proterozoic age. The SHB is unconformably overlain by Old Red Sandstone sediments of possible Late Silurian to definite Middle Devonian age. Field relations demonstrate that the oldest rock-types in the batholith comprise gabbro, monzodiorite and hornblende diorite. These are succeeded by tonalite, granodiorite and granite, which occur both as plutons and as abundant dykes and veins. Later members of the SHB include composite dykes, porphyritic microdiorite, appinitic pipe-like bodies, dolerite dykes and lastly, granophyre dykes. The hypabyssal rocks post-date a phase of weak, heterogeneous deformation manifested locally within the various plutons. Pressure estimates from hornblende compositions indicate a pressure of solidification of 0.26 +-0.1 GPa, corresponding to a depth of about 9 km. Preliminary isotopic dating has indicated an age range from c. 450 to c. 428 MA; latest Mid-Ordovician to Early Silurian. The rocks of the SHB show little sign of the Scandian deformation and metamorphism which are so common elsewhere in this part of Norway.

Fieldsamples
Sample No. Sample type Miscellanrous
MR0075.03 Bedrock
Sampler: Sandstad, J.S./...Stored: Løkken
Comment: Magnetitt-malm, finkornet, dels båndet i veksling med grovkornet pyritt og kvartsrikere bånd med amfibol linser
No. of registrated element analyses = 1
MR0075.04 Bedrock
Sampler: Sandstad, J.S./...Stored: Løkken
Comment: Pyritt-magnetitt malm, båndet, grovkornet pyritt dominerer, kvarts rike lag
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Sample point: Brettingen SØ
(Object Id: 37328 5,00,01)
Location
County: Møre og Romsdal Municipality: Smøla (1573)
Map 1:50000: Smøla (1321-1) Map 1:250000: Kristiansund
County: (Unavailable)
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Fe


Fieldsamples
Sample No. Sample type Miscellanrous
MR0075.01 Bedrock
Sampler: Sandstad, J.S./...Stored: Løkken
Comment: Grønnstein, grønn, fink- svært finkornet, svak kobberkis-mineralisering på stikk og disseminert (10-30 cm bred sone)
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Sample point: Brettingen Ø
(Object Id: 37329 5,00,02)
Location
County: Møre og Romsdal Municipality: Smøla (1573)
Map 1:50000: Smøla (1321-1) Map 1:250000: Kristiansund
Coordinate system: EU89-UTM Zone 32
East: 459870 m. North: 7032466 m.
Longitude: 8.1961970 Latitude: 63.4184610
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Fe


Fieldsamples
Sample No. Sample type Miscellanrous
MR0075.02 Bedrock
Sampler: Sandstad, J.S./...Stored: Løkken
Comment: Kobberkis+pyritt og magnetitt mineralisering i finkornet, blålig grønn bergart (omvandlet grønnstein) (20-30 cm bred sone)
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 1573 - 005 Brettingen

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#
MR0075.01 Bedrock 6089 25 4 27 21 1.2 4035.0
MR0075.02 Bedrock 20000 53 20 215 77 2.4 1860.0
MR0075.03 Bedrock 1887 33 34 354 114 -.2 62.0
MR0075.04 Bedrock 6028 41 30 712 563 .8 168.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sn* Sb* Bi*
MR0075.01 -5.0 2.0 -5 -1.0 21 8.00 -20 -5 -5
MR0075.02 -5.0 -1.0 -5 -1.0 15 231.00 -20 -5 -5
MR0075.03 -5.0 -1.0 -5 -1.0 3 6.00 -20 -5 -5
MR0075.04 -5.0 -1.0 -5 -1.0 -2 9.00 -20 -5 -5
------------------
Sample No. V* Cr* Mn* Fe% W* Sr* La* Na* Mg*
MR0075.01 104 165 226 4.30 -20 35.0 9.00 0 1
MR0075.02 181 218 97 8.88 -20 70.0 9.00 0 0
MR0075.03 177 312 189 10.00 -20 17.0 -1.00 0 1
MR0075.04 81 286 287 10.00 -20 8.0 -1.00 0 1
------------------
Sample No. Al* K * Ca* Te*
MR0075.01 2 0 1 -10.00
MR0075.02 1 0 1 -10.00
MR0075.03 2 0 0 -10.00
MR0075.04 2 -0 0 -10.00

The fact sheet was created on 07.05.2024
Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
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