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	THE ORE DATABASE
	Deposit Area 2012 - 024
	(Last updated 11.okt.2017)

Importance

Public:

Little Importance (reg. 18.02.2015)

Economical:

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

Products

	Element/product	Crude ore grade or quality
	CU	3 %

Operations

	From - To	Activity	Comments
	1837 - 1870	Regular production	Company/Institution :Alten Copper Mines
	1900 - 1906	Core drilling	Company/Institution :Alten Kobbergruber

Mineralization

	Era:	Proterozoic	Period:	Paleoproterozoic
	Dating:		Method:
	Genesis:	Collapse breccia	Form:	Irregular
	Main texture:	Breccia cement	Min. distribution:	Irregular (scattered)

Main grain size:

Medium grained (1-3 mm)

Main alteration:

No country rock alteration

	Strike/Dip:	150 / 60	Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Proterozoic

Period:

Paleoproterozoic

	Province:	Caledonian Basement Province
	Geotec.unit:	Alta-Kvænangen Greenstone Belt
	Tectonic complex:
	Igneous complex:

Group:

Raipas

Formation:

Storviknes

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Dolomite	Major mineral (>10%)
	Gangue mineral	Barite	Subordinate mineral (1-10%)
	Ore mineral	Chalcopyrite	Major mineral (>10%)
	Ore mineral	Bornite	Major mineral (>10%)
	Ore mineral	Tennantite	Subordinate mineral (1-10%)
	Ore mineral	Digenite	Subordinate mineral (1-10%)
	Ore mineral	Siegenite	Subordinate mineral (1-10%)
	Ore mineral	Covellite	Accessory mineral (<1%)
	Ore mineral	Pyrite	Accessory mineral (<1%)
	Ore mineral	Idaite	Accessory mineral (<1%)
	Ore mineral	Sulfosalt	Accessory mineral (<1%)
	Ore mineral	Chalcocite	Accessory mineral (<1%)

Lithology:

	Relationship	Rock	Origin
	Host rock	Dolomitt	Sedimentary Original rock :Dolomite
			Metamorphic facies :Greenschist
	Wall rock	Leirstein	Sedimentary Original rock :Argillaceous sediment
			Metamorphic facies :Greenschist
	Wall rock	Siltstein	Sedimentary Original rock :Siltstone
			Metamorphic facies :Greenschist

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Fault plane	Strike/Dip :70 / 90	Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

The Raipas Cu deposit is situated in the Storviknes Formation which comprises a 200 m thick dolomite unit with interbedded siltstone and a lower red and a upper grey siltstone. Tidal channels, stromatolites and palaeokarst are found in the upper part of the dolomite and indicate deposition in a tidal-flat environment. The main copper mineralisation is in the matrix of karst breccias in the upper part of the massive dolomite, and as disseminated in thin dolomite beds in siltstone and in conglomerates at the top of the dolomite. The mineralisation is copper-dominated although cobalt occurs locally, e.g. Borras. The main ore minerals are chalcopyrite, bornite, digenite and chalcosite, and, in minor amounts, fahlore and linneaite-series minerals. Dolomite and minor barite are the gangue minerals. The thickness of the mineralised breccia bodies at Raipas varies at 1–5 m, with a maximum width of 20–25 m, and a length of 60 m. The Raipas copper deposit shows similarities both with red-bed copper and karst-related lead-zinc deposits. The Raipas deposit produced a total of 12,500 t of ore between 1837 and 1870 with an average grade of 6.7 % Cu.

Photo(s) from the Deposit area:

Photo no. 1 showing Cu mineralised dolomite breccia" Photo no. 2 showing Mine entrances at Raipas"

Bibliography:

From NGU's Reference Archive:

Vokes, F.M. , 1954

	Raipas Gruve I Alta.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 2105;3 pages

	Abstract:
	Rapporten omhandler en 10-dagers undersøkelse av Raipas gruver 1954. Det er gitt en beskrivelse av forekomstens geologi, hvor det konkluderes med at malmsonen er helt utdrevet. Videre undersøkelser blir ikke anbefalt.

Vokes, F.M. , 1955

	Observations at Raipas miner, Alta, Finnmark. Iakttagelser ved Raipas gruve i Alta.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.191;103-114 pages

Abstract:

Raipas gruve i Alta kommune er en gammel gruve som tilhørte det engelske gruveselskapet Alten Copper-works Ltd. i det 19de århundre. Den produserte 12500 tonn kobbermalm È 6,3% Cu i en 30 års periode, men har ikke blitt drevet siden. Forekomsten er i undre del av Raipasformasjonen som i området omkring bunnen av Altafjorden danner et tektonisk vindu under de flattliggende kaledonske skifre. Formasjonen består av grønnstein, skifer og dolomitt som er tydelig foldet, og står på skrå, til dels loddrett, med noe vekslende strøk. I selve gruven består bergartene av to dolomittlag, ca 20-25 m tykke, med et mellomliggende leirsteinslag, 10-14 m tykt. Strøket er ca. N20 grader V med et fall mellom 40 og 85 grader vestover. Malmsonene står i forbindelse med de to dolomittlag, men har vært tydeligere, mere gjennomgående og viktigere i den nedre dolomitten. Her har det vært to hovedsoner som bestod av tavleformete, nesten loddrette breksjesoner med tykkelser mellom en og fem meter. Retningen av dem var nesten rettvinklet på strøket av bergarten. Det finnes ingen malmrester i gruven, men prøver fra den tidligere driften viser at ertsmineralene, kobberkis og broket kobber forekom innimellom de breksjierte stykker av dolomitt.

Vik, Eirik , 1979

	Geologiske undersøkelser ved Raipas kobbergruve, Alta, Finnmark.

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.1625/10A;20 pages

Abstract:

Ved Raipas kobbergruve er det utført geologisk kartlegging, sedimentologiske undersøkelser, geofysiske bakkemålinger (IP, SP, ledningsevne) og diamantboring. Forekomsten ligger på tversgående breksjestrukturer i en massiv dolomitt. Mineralogisk består malmen av kobberkis, bornitt, digenitt og fahlerts som opptrer som matriks i breksjen sammen med kalkspat og barytt. IP-målingene viste sterke anomalier langs kontakten mellom massiv dolomitt og den overliggende siltsteinen. Anomaliene skyldes trolig grafittholdig dolomitt. Diamantboringen viste svak mineralisering, særlig på siltstein / dolomitt kontakten.

Vokes, Frank M. , 1957

	On the presence of minerals of the linnaeite in some copper ores from the Raipas formation of Northern Norway.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.200;112-120 pages

Abstract:

Two minerals of the linnaeite series, A3S4, have been identified and examined in ores from two localities in the Alta district of Finnmark. Their compositions show them to be siegenite and carrollite, respectively. Associated minerals in each case are bornite, chalcopyrite, neodigenite, and a little covellite. Tennantite is also found in the siegenite-bearing ore. The properties, chemical compositions and modes of occurence of the minerals are discussed in this short note which appears to be the first published record of their occurence in Norway.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NO-41-121	Dump	Sampler :Karlstrøm, H./...Stored :Løkken No. of registrated element analyses = 1
	NO-41-122	Dump	Sampler :Karlstrøm, H./...Stored :Løkken No. of registrated element analyses = 1
	NO-41-123	Dump	Sampler :Karlstrøm, H./...Stored :Løkken No. of registrated element analyses = 1
	NO-41-124	Dump	Sampler :Karlstrøm, H./...Stored :Løkken No. of registrated element analyses = 1
	NO-41-125	Dump	Sampler :Karlstrøm, H./...Stored :Løkken No. of registrated element analyses = 1
	NO-41-126	Dump	Sampler :Karlstrøm, H./...Stored :Løkken No. of registrated element analyses = 1
	NO-41-127	Dump	Sampler :Karlstrøm, H./...Stored :Løkken No. of registrated element analyses = 1
	NO-41-128	Dump	Sampler :Karlstrøm, H./...Stored :Løkken 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 2012 - 024 Raipas

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#
NO-41-121	Dump	8885	19	16	242	200	1.6	1.0
NO-41-122	Dump	6128	28	2	11	67	.3	1.0
NO-41-123	Dump	18934	52	9	17	14	18.0	2.0
NO-41-124	Dump	20195	910	2	65	20	16.4	31.0
NO-41-125	Dump	4185	25	4	22	17	3.5	2.0
NO-41-126	Dump	3523	37	2	12	13	.8	3.0
NO-41-127	Dump	20276	53	4	225	116	2.4	1.0
NO-41-128	Dump	7239	21	3	25	13	1.0	1.0

------------------

Sample No.	Pt#	Pd#	Rh#	As*	Cd*	Ba*	Mo*	Sb*	Bi*
NO-41-121	3.0	2.0	2.0	694	.4	10	32.00	3	4
NO-41-122	6.0	4.0	2.0	34	.6	30	2.00	2	2
NO-41-123	5.0	5.0	2.0	60	1.6	55	2.00	2	21
NO-41-124	2.0	3.0	2.0	3419	6.3	28	3.00	248	58
NO-41-125	3.0	4.0	2.0	88	.3	364	5.00	2	6
NO-41-126	1.0	3.0	2.0	72	.6	179	1.00	2	3
NO-41-127	4.0	5.0	3.0	395	1.5	82	4.00	5	2
NO-41-128	5.0	4.0	2.0	47	.6	73	4.00	3	10

------------------

Sample No.	S%	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*
NO-41-121	5.15	6	10	2022	5.20	1.00	5.00	1	12.0
NO-41-122	.70	9	12	5905	2.30	1.00	7.00	1	20.0
NO-41-123	5.75	3	1	6123	2.51	1.00	11.00	1	286.0
NO-41-124	2.70	2	17	5951	2.67	1.00	7.00	1	148.0
NO-41-125	.32	3	3	7266	1.93	1.00	11.00	1	84.0
NO-41-126	.54	3	4	4948	1.72	1.00	7.00	1	71.0
NO-41-127	1.80	5	16	2467	2.58	2.00	7.00	1	16.0
NO-41-128	8.65	1	4	3687	1.58	1.00	9.00	1	414.0

------------------

Sample No.	La*	B*	Na*	Mg*	Al*	P*	K *	Ca*	Ti*
NO-41-121	3.00	4	0	2	0	0	0	3	0
NO-41-122	5.00	3	0	5	0	0	0	10	0
NO-41-123	3.00	2	0	6	0	0	0	12	0
NO-41-124	3.00	5	0	5	0	0	0	11	0
NO-41-125	5.00	3	0	6	0	0	0	14	0
NO-41-126	3.00	2	0	8	0	0	0	17	0
NO-41-127	4.00	2	0	2	0	0	0	4	0
NO-41-128	2.00	2	0	4	0	0	0	7	0

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The fact sheet was created on 19.04.2024

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

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