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Occurence 5618 - 008 Middagsfjellvann
(Object Id: 880)
(Last updated: 11.04.2007)
Location
County: Finnmark Municipality: Måsøy (5618)
Map 1:50000: Snøfjorden (1936-1) Map 1:250000: Honningsvåg
Coordinate system: EU89-UTM Zone 35
East: 404457 m. North: 7859586 m.
Longitude: 24.3934190 Latitude: 70.8218970
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu
Importance
Raw material meaning: Little Importance (reg. 18.02.2015)

Resources and production
Activity: Test mining Reserves:
Operating method: Open pit mining Historical production: ,02 thousand tons


Operations
From - To Activity Comments
- 1902 Test mining Company/Institution :?
1989 - 1989 Sampling Company/Institution :NGU

Mineralization
Era: Paleozoic Period: Devonian
Genesis: Hydrothermal vein Form: Lens
Main texture: Pore space filling Min. distribution: Irregular (scattered)
Main grain size: Medium grained (1-3 mm) Main alteration: Carbonatisation
Strike/Dip: 140 / 80 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Proterozoic Period: Mesoproterozoic
Province: Caledonides
Geotec.unit: Kalak Nappe Complex
Tectonic complex: Snøfjorddekket
Igneous complex:
Group: Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Calcite
Gangue mineral Quartz Major mineral (>10%)
Ore mineral Pyrite Major mineral (>10%)
Ore mineral Chalcopyrite Major mineral (>10%)
Ore mineral Malachite Major mineral (>10%)

Lithology:
Relationship Rock Origin
Host rock Granat-biotittgneis Sedimentary
Original rock :Greywacke
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Foliation Strike/Dip :262 / 15 Pre-mineralisation ;...Effect :None

Information(s) in free text format
Free text
Forekomsten ble sannsynligvis undersøkt rundt århundreskiftet og er kort beskrevet av Skordal (1954). Den opptrer 150 m vest for SV-enden av Middagsfjellvann. Mineraliseringen omfatter kobberkis og svovelkis som finnes sporadisk på druserom i en ca 20 m lang og opptil 3 m bred linse av melkekvarts. Linsen er sonert med en nesten massiv grovkrystallin kjerne bestående av 1-2 dm kvartskrystaller omgitt av en midtre grovkornet randsone med mye druserom som er knyttet til parallelle årer med kamstruktur. De er sporadisk fylt med litt sulfider og kalkspat. De migmatittiske granat-biotittgneisene rundt linsen er brunlige pga. karbonatisering. De er også klorittomvandlet, og fører sprekkefyllinger av kloritt og svovelkis. Langs SV-grensen av den massive kjerne opptrer en 10-50 cm bred knusningssone som fører malakitt.

Bibliography:
From NGU's Reference Archive:
Skordal, A. , 1954
Rapport vedrørende jernmalmforekomst på Burstadneset, Måsøy herred.
;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 2117;3 pages
Abstract:
Rapporten beskriver en befaring av mineraliseringen som er en nokså ren magnetittmalm. Den opptrer i tilknytning til hydrotermale kvartsdannelser og kvartsbreksjer uten kontinuitet. Den har liten eller ingen økonomisk interesse.

Gayer, R.A.; Hayes, S.J.; Rice, A.H.N. , 1985
The structural development of the Kalak Nappe Complex of Eastern and Central Porsangerhalvøya, Finnmark, Norway.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU Bulletin; No.400;67-87 pages
Abstract:
Lithological and structural mapping of Porsangerhalvøya has revealed eight major thrust units within the Kalak Nappe Complex. Five deformation phases have been recognised: D1 produced a foliation preserved within garnet pophyroblasts which grew during prograde metamorphism. Peak metamorphism occurred during D2 and culminated in upper amphibolite facies in the higher nappes and uppermost greenschist facies in the lower nappes. Staurolite porphyroblasts, pseudomorphed first by muscovite and then by kyanite also developed during prograde metamorphism between D1 and D2. D2 formed tight to isoclinal recumbent folds with an associated axial planar regional schistosity (S2) and mineral lineation as well as boudinage structures. D3 and D4 represent less ductile deformations, with associated retrograde staurolite, chloritoid, garnet and biotite porphyroblastesis. Thrusting, initiated as a ductile process during D2, continued into D4 with a decreasing ductile component, producing major nappe translations and an inverted metamorphic sequence. The metamorphism and associated deformation and thrusting is thought to have occurred during the late Cambrian to earliest Ordovician Finnmarkian orogenic event.

Fieldsamples
Sample No. Sample type Miscellanrous
HO-26-49 Bedrock
Sampler: Ihlen, P.M.
Comment: Grovkrystallin kvarts med litt kobber- og svovelkis på druserom.
No. of registrated element analyses = 1
HO-26-50 Bedrock
Sampler: Ihlen, P.M.
Comment: Brunlig karbonatisert gneis med sprekker, delvis innfylt med grovkornet svovelkis og kloritt.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 5618 - 008 Middagsfjellvann

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#
HO-26-49 Bedrock 1035 244 32 1 17 .7 2.0
HO-26-50 Bedrock 30 41 8 79 20 .1 4.0
------------------
Sample No. Pt# Pd# Rh# As* Cd* Ba* Mo* Sb* Bi*
HO-26-49 2.0 2.0 2.0 4 1.0 7 4.00 3 2
HO-26-50 1.0 3.0 2.0 17 1.0 31 2.00 2 2
------------------
Sample No. S% V* Cr* Mn* Fe% Th* U* W* Sr*
HO-26-49 .04 3 11 58 .53 1.00 5.00 1 3.0
HO-26-50 .52 66 39 454 5.04 14.00 5.00 2 9.0
------------------
Sample No. La* B* Na* Mg* Al* P* K * Ca* Ti*
HO-26-49 2.00 2 0 0 0 0 0 0 0
HO-26-50 40.00 2 0 1 2 0 0 1 0

The fact sheet was created on 29.04.2024
Questions or comments regarding the fact sheet can be emailed to:
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