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	THE ORE DATABASE
	Deposit Area 2018 - 008
	(Last updated 11.apr.2007)

Importance

Public:

Little Importance (reg. 18.02.2015)

Economical:

Minor interest , (Confirmed 03.feb.2005 by Peter Ihlen)

Operations

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

Mineralization

	Era:	Paleozoic	Period:	Devonian
	Dating:		Method:
	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.:

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Analyse Results

from

Deposit Area 2018 - 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

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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

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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

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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

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The fact sheet was created on 22.11.2024

Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no

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