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	THE ORE DATABASE
	Occurence 5603 - 004 Bergs gruve
	(Object Id: 764) (Last updated: 11.04.2007)

Mineralization

	Era:	Proterozoic	Period:	Paleoproterozoic
	Genesis:	Hydrothermal vein	Form:	Irregular
	Main texture:	Fracture filling	Min. distribution:	Semi-massive (20-50 % ore minerals)

Main grain size:

Fine grained (< 1 mm)

Main alteration:

Carbonatisation

	Strike/Dip:	60 / 90	Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Proterozoic

Period:

Paleoproterozoic

	Province:	Caledonian Basement Province
	Geotec.unit:	Komagfjord-Repparfjord Greenstone Belt
	Tectonic complex:
	Igneous complex:

Group:

Holmvatn

Formation:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Quartz	Major mineral (>10%)
	Gangue mineral	Carbonate	Subordinate mineral (1-10%)
	Gangue mineral	Actinolite	Subordinate mineral (1-10%)
	Ore mineral	Pyrite	Major mineral (>10%)
	Ore mineral	Pyrrhotite	Subordinate mineral (1-10%)
	Ore mineral	Chalcopyrite	Subordinate mineral (1-10%)

Lithology:

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

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Schistosity	Strike/Dip :72 / 90	Syn-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Bergs gruve ligger på et lite platå på østsida av indre (østre) Ariselv, 2.5 km sør for utløpet i Repparfjorden. Malmen er blottet omkring en vannfyllt synk på 2 x 1.5 m. Sulfidmineraliseringen opptrer i en 70-80 cm bred kvarts-karbonatgang i karbonat-rik grønnstein. Gangen kiler ut mot nordøst og er overdekket mot sørvest, og er antatt å være kortere enn 20 m (Hovland 1968). Grønnsteinen er sterkt småfoldet.

Bibliography:

From NGU's Reference Archive:

Hovland, Roar , 1969

	Repparfjordfeltet.

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.888;19 pages

Abstract:

Etter oppdrag fra A/S National Industri har Norges geologiske undersøkelse i årene 1964 - 1968 gjennomført undersøkelser av malmforekomstene i Repparfjord. Undersøkelsesprogrammet har omfattet geofysikk og geokjemisk prospektering, geologisk kartlegging og diamantboringer. Den geofysisk og geokjemiske pros- pekteringen samt diamantboringsprogrammet ble fullført i 1967. I sesongen 1968 har man undersøkt nærmere de geofysiske og geokjemiske anomalier som er frem- kommet utenfor selve malmfeltet samt fullført den geologiske kartleggingen av området. Et fremtidig malmletingsprogram vil naturlig falle i to deler. a) Å under- søke Ulverygg-malmens eventuelle fortsettelse videre øst, og vestover samt dens forløp mot dypet i Hovedfeltet. b) Å undersøke de påviste impregnasjonsområdene mellom Bratthammer og Stein- fjell samt å drive et videre arbeid vestover i kvartsittområdet. Likeledes kan det være aktuelt å se nærmere på forekomster i Porsafeltet.

Reitan, Paul H. , 1963

	The geology of the Komagfjord tectonic window of the Raipas suite, Finnmark, Norway.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.221;1-71 + kar pages

Abstract:

The report is based on four summers (1956-59) of field work in an area of approximately 860 km2. The area is located in western Finnmark, northern Norway, between 70 degrees 10' and 70 degrees 31' N latitude and 12 degrees 40' and 13 degrees 50' E Oslo longitude. The purpose of the investigation was to study the rocks within a hitherto mainly unexamined area of Precambrian rocks surrounded by Caledonian rocks. Portions of the area near the sea had been visited by a few geologists prior to the initiation of this investigation. It was therefor quite certain that the rocks were Precambrian in age and constituted a window in the Caledonides, but the size of the window was unknown nor had most of the window been studied geologically. This report establishes the Precambrian age of the rocks and delineates the boundaries of the window. The Precambrian rocks along the western coast of Finnmark were previously called the Raipas formation and known to outcrop in (at least) two windows. As this report differentiates seven formations which constitute two groups whithin the Komagfjord (the northernmost) tectonic window, it is purposed that the Precambrian rocks of the two windows be known as the Raipas suite.

Pharaoh, Tim C.; Ramsey, Donald; Jansen, Øystein , 1983

	Stratigraphy and structure of the northern part of the Repparfjord - Komagfjord window, Finnmark, Northern Norway.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.377;1-45 pages

Abstract:

In the northern district of the Repparfjord-Komagfjord Window, supracrustal and intrusive rocks of Early Proterozoic age are unconformably overlain by a thin sequence of Vendian sediments. Both of these units are overthrust by allochthonous rocks of the lavas, tuffs and sediments of the Raipas Supergroup and intrusions of the Raudfjell Suite, regionally metamorphosed at greenschist facies during the polyphase Svecokarelian Orogeny, c. 1840 Ma. The c. 8 km thick supracrustal sequence is divided into four groups and eleven formations on a lithostratigraphic basis. The lithological characteristics of these units are described and compared with rocks of similiar age elsewhere in N. Norway. The stratigraphy and sedimentology of the thin (<200 m thick), autochtonous, Vendian cover sequence is also described. The caledonian Orogeny resulted in complex deformation of the autochtonous cover as well as considerable reactiviation of the underlying basement.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	HO-4-113	Bedrock	Sampler: Sandstad, J.S./...Stored: Løkken Comment: greenstone, fine grained, rusty, weak sulphide diss. No. of registrated element analyses = 1
	HO-4-114	Bedrock	Sampler: Sandstad, J.S./...Stored: Løkken Comment: quartz vein, coarse grained with py and cpy in cracks. No. of registrated element analyses = 1
	HO-4-115	Bedrock	Sampler: Sandstad, J.S./...Stored: Løkken Comment: quartz vein, coarse grained, no sulphides. No. of registrated element analyses = 1
	HO-4-116	Bedrock	Sampler: Sandstad, J.S./...Stored: Løkken Comment: greenstone, carbonatized, carb+act+py+cpy veinlets No. of registrated element analyses = 1
	HO-4-117	Dump	Sampler: Sandstad, J.S./...Stored: Løkken Comment: po-cpy ore, semi-massive. 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 5603 - 004 Bergs gruve

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-4-113	Bedrock	1019	237	22	52	106	.2	1.0
HO-4-114	Bedrock	34312	231	22	244	583	11.1	275.0
HO-4-115	Bedrock	222	19	8	4	15	.1	8.0
HO-4-116	Bedrock	5247	103	8	27	50	1.5	551.0
HO-4-117	Dump	99999	814	22	1045	2508	27.2	21.0

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

Sample No.	Pt#	Pd#	Rh#	As*	Cd*	Ba*	Mo*	Sb*	Bi*
HO-4-113	1.0	2.0	2.0	2	2.0	4	1.00	2	2
HO-4-114	1.0	3.0	2.0	2	2.0	10	3.00	2	2
HO-4-115	1.0	2.0	2.0	2	1.0	15	4.00	2	4
HO-4-116	1.0	3.0	2.0	2	1.0	3	2.00	2	7
HO-4-117	1.0	5.0	2.0	3	3.0	4	1.00	9	44

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Sample No.	S%	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*
HO-4-113	.01	145	71	1107	11.02	19.00	5.00	1	5.0
HO-4-114	6.52	3	9	95	7.34	2.00	5.00	1	7.0
HO-4-115	.01	6	12	145	.72	1.00	5.00	1	8.0
HO-4-116	.34	29	50	1040	4.60	2.00	5.00	1	29.0
HO-4-117	33.55	1	1	10	37.95	3.00	5.00	1	1.0

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

Sample No.	La*	B*	Na*	Mg*	Al*	P*	K *	Ca*	Ti*
HO-4-113	27.00	2	0	8	8	0	0	1	0
HO-4-114	2.00	3	0	0	0	0	0	0	0
HO-4-115	2.00	3	0	0	0	0	0	0	0
HO-4-116	2.00	2	0	3	3	0	0	4	0
HO-4-117	2.00	5	0	0	0	0	0	0	0

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The fact sheet was created on 09.05.2024

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