Fact Sheet for <b>Occurence 5043 - 004 Setertjern skjerp</b>

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	THE ORE DATABASE
	Occurence 5043 - 004 Setertjern skjerp
	(Object Id: 232) (Last updated: 02.12.1998)

Location

County:

Trøndelag

Municipality:

Raarvihke (5043)

Map 1:50000:

Tunnsjøen (1924-3)

Map 1:250000:

Grong

Coordinate system:

EU89-UTM Zone 33

(Coordinates NOT confirmed)

East:

415182 m.

North:

7180099 m.

Longitude:

13.2188130

Latitude:

64.7348680

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Resource

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

Importance

Raw material meaning:

Not Assessed (reg. 18.02.2015)

Resources and production

	Activity:	Exploration	Reserves:
	Operating method:		Historical production:

Operations

From - To Activity Comments

1971 - 1971 Geochemistry Company/Institution :NGU

1975 - 1975 Geology Company/Institution :Grong Gruber A/S

Mineralization

Genesis: Form:

Main texture: Min. distribution:

Main grain size: Main alteration:

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period: Ordovician

Province: Caledonides

Geotec.unit: Køli Nappe Complex

Tectonic complex: Gjersvik Nappe

Igneous complex:

Group: Gjersvik Formation:

Information(s) in free text format

Free text

Det er noe usikkerhet rundt dette skjerpet. Det er rapportert hos Oftedahl (1958), skjerp 48, men Grong Gruber A/S har ikke gjenfunnet det. Forekomsten skal ligge ca. 1 km NV for Setervik ved Tunnsjøen, og 200-500 m SSV for Seterviktjern. Det skal være skjerpet på en 1 m mektig kissone, rik på magnetkis. Den ligger i grønnstein. Grong Gruber A/S har påvist en kissone som består av svovelkis- og magnetitt-disseminasjon, og det er usikkert hvorvidt dette er den omtalte forekomsten. I tilfelle er magnetkis blitt forvekslet med magnetitt. En mulighet er også at skjerpet ligger i forlengelsen av Hausvikforekomsten.

Bibliography:

From NGU's Reference Archive:

Oftedahl, Christoffer , 1958

Oversikt over Grongfeltets skjerp og malmforekomster.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.202;1-75 + fo pages

Abstract:

Ore occurences of the Grong area: In the period 1910-1918 a great number of ore occurences were discovered in the Grong area. The late state geologist Steinar Foslie mapped the area in the years 1922-1931. Foslie also mapped all claims and occurences and made special field investigations in a few cases. This book presents a survey of all occurences chiefly based on the field observations of Foslie. In addition the present author has done some field work in connection with the three large deposits, Joma, Skorovass, and Gjersvik. The map, Plate 1, shows the areal geology and the location of the occurrences, numbered from 1 to 131. the ore of the occurrences is chiefly pyrite. The larger occurrences also contain some chalcopyrite and sphalerite etc. and the smaller occurrences contain ither pure pyrite with some magnetite. The Joma deposit (No. 1), contains about 15.5 mill. tons of ore. The ore zone forms an arc and is situated within a thick series of greenstones (Fig. 1). The Skorovass mine (No. 2), contains about 7,5 mill. tons of ore. The deposit is situated in a greenstone complex (Fig. 7), and is immediately surrounded by asid tuffs of quartz keratophyric composition (Table 1).

From - To	Activity	Comments
1971 - 1971	Geochemistry	Company/Institution :NGU
1975 - 1975	Geology	Company/Institution :Grong Gruber A/S

	Genesis:		Form:
	Main texture:		Min. distribution:

	Province:	Caledonides
	Geotec.unit:	Køli Nappe Complex
	Tectonic complex:	Gjersvik Nappe
	Igneous complex: