Fact Sheet for <b>Occurence 1836 - 301 Hestmonkallen</b>

					Norsk versjon
	THE INDUSTRIAL MINERAL DATABASE
	Occurence 1836 - 301 Hestmonkallen
	(Object Id: 7440) (Last updated: 20.01.2022)

Location

County:

Nordland

Municipality:

Rødøy (1836)

Map 1:50000:

Rødøy (1828-2)

Map 1:250000:

Mo i Rana

Coordinate system:

EU89-UTM Zone 33

East:

402533 m.

North:

7383097 m.

Longitude:

12.8046470

Latitude:

66.5515030

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Resource

Resource Type:

Olivine

Resource Subtype:

Olivine

Importance

Raw material meaning:

Little Importance (reg. 18.02.2015)

Resources and production

	Activity:	Exploration	Reserves:
	Operating method:		Historical production:

Mineralization

Era: Paleozoic Period:

Genesis: Form: Lens

Main texture: Structureless Min. distribution: Massive (>50 % ore minerals)

Main grain size: Very unevenly grained

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Period:

Province:

Geotec.unit:

Tectonic complex:

Igneous complex:

Group: Formation:

Mineralogy

Mineral Amount

Pyroxene Major mineral (>10%)

Serpentine Major mineral (>10%)

Talc Subordinate mineral (1-10%)

Magnesite Subordinate mineral (1-10%)

Information(s) in free text format

Free text

Harzburgittkropp med 1-3 cm store pyroksenkrystaller i en finkornig masse av opprinnelig olivin, nå som serpentin, noe talk og magnesitt. Sto tidligere som olivinforekomst,- dette er hermed forandret til ultramafitt (uspes.)

Bibliography:

From NGU's Reference Archive:

Karlsen, Tor Arne ; Gautneb, Håvard ; Lund, Bjørn , 1999

Status-report on talc-prospecting in Helgeland, northern Norway.

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.99.068;? pages

Abstract:

A prospecting programme for talc has been carried out in Helgeland. The results are both good and bad; a new talc deposit has been found in Kvanndalen, a few km west of Altermark. The deposit are exposed, and the size is not yet known, except that the maximum width is around 50 metres. To be able to use th ore, there must either be a market for the assemblage talc-breunnerit-olivine, or it must be possible to remove the olivine. A further deposit of interest occurs in Misvær. Otherwise, talc is rather uncommon in the numerous ultramafic lenses around the Høgtuva-, Sjona- and Svartisen windows. The ultramafic lenses are dominated by the metamorphic assemblage enstatite-anthophyllite-carbonate with or without olivine. It is concluded that the metamorphic grade has, in general, been too high in the western area and that possible pre-existing talc-carbonate assemblages have been altered to the minerals above. The deposit in Kvanndalen probably represent the margin of what can be termed the Altermark Talc Province. Only olivine has been included in the talc-carbonate assemblage, while bodies further to the west carry olivine, enstatite and anthophyllite.

Era:	Paleozoic	Period:
Genesis:		Form:	Lens
Main texture:	Structureless	Min. distribution:	Massive (>50 % ore minerals)

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

	Mineral	Amount
	Pyroxene	Major mineral (>10%)
	Serpentine	Major mineral (>10%)
	Talc	Subordinate mineral (1-10%)
	Magnesite	Subordinate mineral (1-10%)