Fact Sheet for <b>Occurence 0

					Norsk versjon
	THE ???? DATABASE
	Occurence 0 - 000 FEIL
	(Object Id: ) (Last updated: 16.02.2005)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Innset (1520-2)

Map 1:250000:

Røros

Coordinate system:

UTM-Zone 33 - EUREF89/WGS84

East:

555600 m.

North:

6952800 m.

Longitude:

10.0881720

Latitude:

62.7018280

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Resource

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

Importance

Raw material meaning:

Not Assessed (reg. 18.02.2015)

Resources and production

	Activity:	Pitting	Reserves:
	Operating method:		Historical production:

Operations

From - To Activity Comments

1983 - 1984 Geophysics Company/Institution :Folldal Verk A/S

1984 - 1984 Geochemistry Company/Institution :Folldal Verk A/S

1984 - 1985 Sampling Company/Institution :Folldal Verk A/S

1984 - 1985 Geology Company/Institution :Folldal Verk A/S

1997 - 1997 Sampling Company/Institution :NGU-Malmreg.

Mineralization

Genesis: Volcex Form: Layer

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

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

Strike/Dip: 30 / 60 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Period:

Province: Caledonides

Geotec.unit: Trondheim Nappe Complex

Tectonic complex: Støren Nappe

Igneous complex:

Group: Støren Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Ore mineral Magnetite Major mineral (>10%)

Ore mineral Pyrite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Host rock Chert Sedimentary
Original rock :Exhalite

Metamorphic facies :Greenschist

Wall rock Greenstone Extrusive
Original rock :Basalt

Metamorphic facies :Greenschist

Structures

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

Host rock Foliation Strike/Dip :30 / 60 Post-mineralisation ;...Effect :None

Information(s) in free text format

Description

Folldal Verk A/S / Amoco utførte i 1983 regionale geofysiske helikoptermålinger i området, som i 1984-85 ble fulgt opp med detaljundersøkelser mellom Nyberget gruve og Bergstjern. Stikningsnett ble opprettet, fulgt av detaljgeologisk kartlegging, geofysiske målinger (VLF, Mag, CEM), fastfjell- og jordprøvetaking. Bergstjern IV er en kvartsbåndet magnetitt-mineralisering som er undersøkt med en 4 x 2 m2 stor synk, som er vannfylt og utilgjengelig. Observasjoner av tippmaterialet viser en blågrå chert med opptil 10 cm mektige bånd av finkornig, massiv magnetitt og litt svovelkis. Vanligvis er magnetittbåndingen i mm- til cm-skala. Svovelkis, som 1-2 mm store euhedrale krystaller, er vanlig opptredende i cherten. Denne cherthorisonten med magnetittbånding er også blottet et par steder ca. 250 m mot nord.

Bibliography:

From NGU's Reference Archive:

Nilsen, Odd , 1978

Caledonian sulphide deposits and minor iron-formations from the southern Trondheim region, Norway.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.340;35-85 + k pages

Abstract:

Within the southern and central parts of the Trondheim region of the Norwegian Caledonides a great number of small, stratabound cupriferous pyrite deposits are confined to mafic metavolcanics of the Gula, Støren and Fundsjø Groups of the Lower Palaeozoic succession. The deposits occuring within, or in close contact with the metavolcanics are characterized by their association with minor manganiferous oxide/silicate iron-formations - better known as "vasskis" ore type - within the metamorphic low-grade areas. The iron-fprmations of the metamorphic higher grade terrains on the other hand, which are extensively developed within the Gula Group, are mostly of a pyrrhotitic sulphide/silicate type and sulphurization processes are thought to have played an important role during the metamorphism. The pyrite deposits occurring adjacent to the metavolcanics bear no relationship to the iron-formations. They are embedded in pelitic, often carbonaceous assemblages (Gula Group) or within tuffitic members of the volcanogene Støren Group, and they are thought to represent re-sedimented (reworked) deposits. The pyrite deposits display varying degree of metamorphic reconstitution and a tectonic control has apparently determined their disc- or ruler-shaped morphology.

References not to be found in NGU's Reference Archive.:

Bakke, O. 1984: Oppdal project. Intern rapp. Folldal Verk A/S. BV 3018

Bakke, O. 1984: Oppdal prosjekt. Intern rapp. Folldal Verk A/S. BV 3019

Fieldsamples

Sample No. Sample type Miscellanrous

ST0364.01 Dump

Sampler: Wilberg/...Stored: Løkken

Comment: Massiv fink. mt-min.

No. of registrated element analyses = 1

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

From - To	Activity	Comments
1983 - 1984	Geophysics	Company/Institution :Folldal Verk A/S
1984 - 1984	Geochemistry	Company/Institution :Folldal Verk A/S
1984 - 1985	Sampling	Company/Institution :Folldal Verk A/S
1984 - 1985	Geology	Company/Institution :Folldal Verk A/S
1997 - 1997	Sampling	Company/Institution :NGU-Malmreg.

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

	Province:	Caledonides
	Geotec.unit:	Trondheim Nappe Complex
	Tectonic complex:	Støren Nappe
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Ore mineral	Magnetite	Major mineral (>10%)
Ore mineral	Pyrite	Subordinate mineral (1-10%)

Relationship	Rock	Origin
Host rock	Chert	Sedimentary Original rock :Exhalite
		Metamorphic facies :Greenschist
Wall rock	Greenstone	Extrusive Original rock :Basalt
		Metamorphic facies :Greenschist

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Foliation	Strike/Dip :30 / 60	Post-mineralisation ;...Effect :None