Fact Sheet for <b>Occurence 5044 - 303 Jengelfjell</b>

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	THE INDUSTRIAL MINERAL DATABASE
	Occurence 5044 - 303 Jengelfjell
	(Object Id: 15082) (Last updated: 26.02.2004)

Location

County:

Trøndelag

Municipality:

Namsskogan (5044)

Map 1:50000:

Majavatn (1925-3)

Map 1:250000:

Mosjøen

Coordinate system:

EU89-UTM Zone 33

(Coordinates NOT confirmed)

East:

434699 m.

North:

7219400 m.

Longitude:

13.6103970

Latitude:

65.0917660

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Resource

Resource Type:

Olivine

Resource Subtype:

Ultramafic (unspec.)

Importance

Raw material meaning:

Not Assessed (reg. 18.02.2015)

Mineralization

Genesis: Form:

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Main grain size:

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Plunge:

Stratigraphic classification of host rock

Era: Period:

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Tectonic complex:

Igneous complex:

Group: Formation:

Bibliography:

From NGU's Reference Archive:

Foslie, S. , 1957

Namsvatnet med en del av Frøyningsfjell Geologisk kart. Berggrunnskart; Namsvatnet; 1:100 000; trykt i farger; NGU Publ.nr.196

;Norges geologiske undersøkelse;KART

Foslie, Steinar; Strand, Trygve , 1956

Namsvatnet med en del av Frøyningsfjell.

;Norges geologiske undersøkelse;KARTBESKRIVELSE; TIDSSKRIFTARTIKKEL;NGU; No.196;1-82 + fo pages

Abstract:

The rocks of the area can be divided into three sharply separated groups. These are in ascending tectonic order: 1. The Børgefjell Massif in the north-eastern part of the area. 2. A complex of low-grade metamorphic sediments and volcanics. 3. A complex of high-grade metamorphic schists and gneisses in the west part of the area. The Børgefjell Massif is built up of granitic gneisses, porphyroblast schists rich in albite-oligoclase and micaschists, with subordinate bands of quartzite. There is a sharp tectonic boundary with a structural conformity to the overlying rocks. The Børgefjell Massif is thus a basal gneiss massif in the sense of Olaf Holtedahl. Probably its rocks are of pre-Cambrian age. The granitic gneisses and schists are in alternating, rather flat-lying sheets. East of Store Namsvatnet a beautiful anticlinal structure appears.

Gustavson, Magne , 1973

Børgefjell. Beskrivelse til det berggrunnsgologiske gradteigskart J.19 - 1: 100 000

;Norges geologiske undersøkelse;KARTBESKRIVELSE; TIDSSKRIFTARTIKKEL;NGU; Skrifter; No.298 ; 8;43 + kart pages

Abstract:

Three main structural units are present: 1. The Precambrian (Svecofennokarelian) basement of the Børgefjell Window. ". Low grade (greenschist facies) Lower Paleozoic rocks belonging to the Seve-Køli Nappe Complex. 3. The higher grade (amphibolite facies) Helgeland Nappe, thrust on top of the low grade rocks. The bedrock lithologies within these units are briefly described. Metasediments, metavolcanics and intrusive igneous rocks are present in the Caledonian part of the sequence. Within the Precambrian, granite and granitic gneiss predominate but metasediments and rocks transitional between gneisses and the metasediments are common. The stratigraphical position of the Caledonian rocks is briefly discussed.

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