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	THE ORE DATABASE
	Occurence 1813 - 024 Vandalsvik
	(Object Id: 2941) (Last updated: 01.03.2000)

Operations

	From - To	Activity	Comments
	1982 - 1983	Geochemistry	Company/Institution :BP Norge A/S Minerals
	1989 - 1989	Sampling	Company/Institution :NGU-Malmreg.

Mineralization

	Era:	Paleozoic	Period:	Devonian
	Genesis:	Hydrothermal vein	Form:	Plate
	Main texture:	Fracture filling	Min. distribution:	Irregular (scattered)

Main grain size:

Medium grained (1-3 mm)

Main alteration:

	Strike/Dip:	117 / 40	Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Paleozoic

Period:

Silurian

	Province:	Caledonides
	Geotec.unit:	Helgeland Nappe Complex
	Tectonic complex:
	Igneous complex:	Bindal Batholith

Group:

Formation:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Quartz	Major mineral (>10%)
	Ore mineral	Pyrrhotite	Major mineral (>10%)
	Ore mineral	Galena	Major mineral (>10%)
	Ore mineral	Sphalerite	Major mineral (>10%)
	Ore mineral	Arsenopyrite	Subordinate mineral (1-10%)
	Ore mineral	Molybdenite	Accessory mineral (<1%)

Lithology:

	Relationship	Rock	Origin
	Host rock	Turmalingranitt	Intrusive Original rock :Granite

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Joints/Fractures	Strike/Dip :124 / 76	Pre-mineralisation ;...Effect :Controls

Information(s) in free text format

Free text

Mineraliseringen ble påvist av BP Norge A/S Minerals i forbindelse med oppfølging av geokjemiske gullanomalier under regional prospektering i Helgeland. Langs veien mellom Vandalsvik og Skomovik på vestsiden av Velfjord opptrer et massiv av lys grå turmalinførende toglimmergranitt som fører tidlige turmalin-kvartsganger lokalt med litt molybdenglans. Disse gjennomsettes av glassaktige kvartsganger som ofte viser mylonittisk tekstur og/eller duktil skjærdeformasjon av granitten langs ganggrensen og langs skjærplan inne i gangen. Magnetkisen ledsages av varierende mengde sinkblende, blyglans og lokalt noe arsenkis. Gangene er sjelden mer enn 10 cm brede og 5 cm lange. Helt lokalt finnes det stokkverk av 1-5 mm sulfidårer.

Bibliography:

From NGU's Reference Archive:

Nordgulen, Øystein; Sundvoll, Bjørn , 1992

	Strontium isotope composition of the Bindal Batholith, Central Norwegian Caledonides

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU Bulletin; No.423;19-39 pages

Abstract:

Forkortet: A strontium isotope study of the Bindal Batholith has been carried out. The data generally do not permit precise and accurate age calculations; however, good estimates for initial Sr ratios are commonly obtained. Low initial ratios (c. 0.704-0.705) with little internal variation are present in granitoids in the southeastern part of the batholith. Rocks with intermediate initial ratios (0.705-0.710) predominate and are present throughout most of the batholith, whereas very high ratios (>0.715) are found in tourmaline granites and anatec- tic granitoids in the west. Considering a subduction related setting for the plutonism, the geographical distribution of Sr initial ratios would be consis- tent with a westward-dipping subduction zone.

Myrland, Rolf , 1972

	Velfjord. Beskrivelse til det berggrunnsgeologiske gradteigskart I 18 - 1:100 000.

;Norges geologiske undersøkelse;KARTBESKRIVELSE; TIDSSKRIFTARTIKKEL;NGU; Skrifter; No.274; 1;1-30 + ka pages

Abstract:

The various lithologies are described. These comprise granitic basements rocks of supposed Pre-Cambrian age and Cambro-Silurian supracrustals and intrusives. The intrusives are mostly found within the Bindal and Velfjord massifs. These massifs are younger than the supracrustals, but their mutual age relationship is uncertain. Tectonically the rocks are sitated in "the high metamorphic nappe-complex" of central and western Helgeland. The supracrustal rocks have undergone at least three phases of Caledonian folding, the F2 phase producing the main regional structures. The rocks have mineral assemblages which place them in the almandine-amphibolite metamorphic facies.

Name of Sample point: Prøvepunkt 1

(Object Id: 4193 24,00,01)

Location

County:

Nordland

Municipality:

Brønnøy (1813)

Map 1:50000:

Velfjord (1825-4)

Map 1:250000:

Mosjøen

Coordinate system:

EU89-UTM Zone 33

East:

381882 m.

North:

7262818 m.

Longitude:

12.4501360

Latitude:

65.4663240

Show on map

Resource

	Resource Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Resource Subtype:	Zinc
			Element(s):	Zn Pb As

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	B25-1	Bedrock	Sampler: Ihlen, P.M./...Stored: Løkken Comment: Lys grå granitt med 1-2 cm brede soner med hårtynne parallelle årer av po, gn og sl. Lokalt sveller årene ut til 2 cm brede linser.
	NO0838.04	Bedrock	Sampler: Ihlen, P.M./...Stored: Løkken Comment: Kvarts ± muskovittåre med striper og aggregater av po, sl og litt ga. No. of registrated element analyses = 1
	NO0838.05	Bedrock	Sampler: Ihlen, P.M./...Stored: Løkken Comment: Lys grå granitt med nettverk av svarte årer. No. of registrated element analyses = 1
	NO0838.06	Bedrock	Sampler: Ihlen, P.M./...Stored: Løkken Comment: Hårtynne arsenkisårer i lysgrå granitt (Skomovik). No. of registrated element analyses = 1
	39/9089659	Bedrock	Sampler: Ihlen, P.M./...Stored: Løkken Comment: Mørk grå forvitrede kvartsårer med et synlig gn-korn.
	39/9089660	Bedrock	Sampler: Ihlen, P.M./...Stored: Løkken Comment: Gn+sl-åre i forskifret turmalingranitt langs kanten av kvartsgang.

NB! All analyse values are shown at the end of the printout.:

Name of Locality: Steinbruddet

(Object Id: 3784 24,01,00)

Location

County:

Nordland

Municipality:

Brønnøy (1813)

Map 1:50000:

Velfjord (1825-4)

Map 1:250000:

Mosjøen

Coordinate system:

EU89-UTM Zone 33

East:

381902 m.

North:

7262818 m.

Longitude:

12.4505680

Latitude:

65.4663310

Show on map

Resource

	Resource Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Resource Subtype:	Zinc
			Element(s):	Zn Pb As

Resources and production

	Activity:	Exploration	Reserves:
	Operating method:		Historical production:

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Analyse Results

from

Deposit Area 1813 - 024 Vandalsvik

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#
NO0838.04	Bedrock	363	11511	14633	24	19	57.7	53.0
NO0838.05	Bedrock	18	36	22	2	2	-.3	16.0
NO0838.06	Bedrock	59	273	228	22	1	1.0	35.0

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

Sample No.	Pt#	Pd#	Rh#	As*	Cd*	Ba*	Mo*	Sb*	Bi*
NO0838.04	-3.0	-3.0	-5.0	4	287.4	3	1.00	4	210
NO0838.05	-3.0	-3.0	-5.0	-2	.4	13	-1.00	-2	3
NO0838.06	-3.0	-3.0	-5.0	3946	1.9	8	1.00	-2	5

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

Sample No.	S%	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*
NO0838.04	5.25	1	8	158	6.79	2.00	-5.00	-2	4.0
NO0838.05	.32	6	3	156	2.11	20.00	9.00	-2	7.0
NO0838.06	.35	-1	2	36	1.02	10.00	11.00	-2	6.0

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

Sample No.	La*	B*
NO0838.04	3.00	4
NO0838.05	49.00	3
NO0838.06	22.00	3

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The fact sheet was created on 25.04.2024

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