Fact Sheet for <b>Occurence 5516

					Norsk versjon
	THE ORE DATABASE
	Occurence 5516 - 005 Storvatnet
	(Object Id: 1370) (Last updated: 07.02.2024)

Location

County:

Troms

Municipality:

Gratangen (5516)

Map 1:50000:

Gratangen (1432-3)

Map 1:250000:

Narvik

Coordinate system:

EU89-UTM Zone 33

East:

608193 m.

North:

7614671 m.

Longitude:

17.6604560

Latitude:

68.6230580

Show on map

Resource

	Resource Type:	Ferrous metals(Fe, Mn, Ti)	Resource Subtype:	Iron
			Element(s):	Fe

Importance

Raw material meaning:

Little Importance (reg. 18.02.2015)

Resources and production

	Activity:	Exploration	Reserves:
	Operating method:		Historical production:

Mineralization

Genesis: Sedex Form: Layer

Main texture: Banded Min. distribution: Semi-massive (20-50 % ore minerals)

Main grain size: Fine grained (< 1 mm) Main alteration:

Strike/Dip: 35 / 40 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Period:

Province:

Geotec.unit:

Tectonic complex:

Igneous complex:

Group: Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Amphibole Major mineral (>10%)

Ore mineral Magnetite Major mineral (>10%)

Lithology:

Relationship Rock Origin

Host rock amfibolitt Extrusive
Original rock :Tuff

Metamorphic facies :Amphibolite

Wall rock kalkspatmarmor Sedimentary
Original rock :Limestone

Metamorphic facies :Amphibolite

Structures

Location: Type: Orientation(360 gr.): Relation to min.:

Host rock Foliation Strike/Dip :35 / 40 Post-mineralisation ;...Effect :None

Information(s) in free text format

Free text

Det ble ikke funnet skjerp eller mineralisering øst for Storvatnet eller ved Mellomvasselva, hvor Gustavson (1974)sier det skal finnes. I veiskjæring langs E6, ved UTM 608200 7614650, er det en tynn magnetitt-mineralisering. I en vekslende enhet av kalkspatmarmor, kvartsittisk- og kalkglimmerskifer er det et vel 10cm mektig lag av finkornet amfibolitt med semimassiv til massiv magnetitt (prøve 01 og 02).

Bibliography:

From NGU's Reference Archive:

Gustavson, Magne; Vogt, Thorolf , 1974

Narvik. Beskrivelse til det berggrunnsgeologiske gradteigskart N9 - 1:100 000 (med fargetrykt kart).

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL; KARTBESKRIVELSE;NGU; Skrifter; No.308; 13;1-34 + ka pages

Abstract:

The geological map Narvik, published in 1950, is briefly described. The bedrock of this map area can be subdivided into autochthonous and allochthonous rocks. The autochthonous rocks comprise the Precambrian (mainly the Rombak window) and overlying conglomerate and sandstone of supposed Lower Cambrian age. An angular unconformity separates the Precambrian from Lower Cambrian. The allochthonous, Caledonian sequence can be subdivided into three thrust units. The main part of this sequence is probably Cambro-Silurian in age, but slices of deformed Precambrian granite occur at the base of the middle unit. Metamorphism of the allochthonous sequence took place in the epidote-amphibolite and almandine-amphibolite facies (up to kyanite grade). A chapter on the economic geology of the area and an excursion guide are included.

Fieldsamples

Sample No. Sample type Miscellanrous

Storvann-1 Bedrock

Sampler: Bjerkgård/Raaness/...Stored: Løkken

Comment: biotitt-amfibolskifer med bånd av magnetitt

No. of registrated oxide analyses = 1

TR0421.01 Bedrock

Sampler: Wilberg, R./...Stored: Løkken

Comment: Amfibolitt med semimassiv mt.

TR0421.02 Bedrock

Sampler: Wilberg, R./...Stored: Løkken

Comment: Amfibolitt med semimassiv mt.

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

Analyse Results

from

Deposit Area 5516 - 005 Storvatnet

Oxide analyses
( All values are in % )

Sample No. Sample Type SiO2 Al2O3 TiO2 Fe2O3 MnO MgO CaO

Storvann-1 Bedrock 40.85 3.09 0.15 47.93 0.80 1.71 5.53

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

Sample No. Na2O K2O P2O5 Loss Sum

Storvann-1 0.55 0.51 0.53 -1.11 101.00

	Genesis:	Sedex	Form:	Layer
	Main texture:	Banded	Min. distribution:	Semi-massive (20-50 % ore minerals)

	Province:
	Geotec.unit:
	Tectonic complex:
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Amphibole	Major mineral (>10%)
Ore mineral	Magnetite	Major mineral (>10%)

Relationship	Rock	Origin
Host rock	amfibolitt	Extrusive Original rock :Tuff
		Metamorphic facies :Amphibolite
Wall rock	kalkspatmarmor	Sedimentary Original rock :Limestone
		Metamorphic facies :Amphibolite

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Foliation	Strike/Dip :35 / 40	Post-mineralisation ;...Effect :None

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
Storvann-1	Bedrock	40.85	3.09	0.15	47.93	0.80	1.71	5.53

Sample No.	Na2O	K2O	P2O5	Loss	Sum
Storvann-1	0.55	0.51	0.53	-1.11	101.00