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THE INDUSTRIAL MINERAL DATABASE
Occurence 1108 - 301 Stølsfjell
(Object Id: 7978)
(Last updated: 09.05.2011)

Location
County: Rogaland Municipality: Sandnes (1108)
Map 1:50000: Høle (1212-1) Map 1:250000: Stavanger
Coordinate system: EU89-UTM Zone 32
East: 325593 m. North: 6527103 m.
Longitude: 5.9769460 Latitude: 58.8483330
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Resource
Resource Type: Talc Resource Subtype: Talc (Soapstone)

Importance
Raw material meaning: Not Assessed (reg. 16.03.2017)

Resources and production
Activity: Mining Reserves:
Operating method: Open pit and underground mining Historical production:


Operations
From - To Activity Comments
1960 - 1965 Regular production Company/Institution :Norwegian Talc

Mineralization
Genesis: Form:
Main texture: Min. distribution:
Main grain size:
Strike/Dip: Direction:
Plunge:
Stratigraphic classification of host rock
Era: Period:
Province:
Geotec.unit:
Tectonic complex:
Igneous complex:
Group: Formation:

Mineralogy
Mineral Amount
Talc Major mineral (>90%)

Information(s) in free text format
Description
Location The deposit Stølsfjell, also named Nordland, is situated in Høle, some 20 km SE of the city of Stavanger. Description According to Mortenson (1945) the location is in the hills which can be reached by following a 4 km long road from the east end of Tengesdalsvatn. This is a rare type of occurrence for Norway as talc/soapstone here is formed by metasomatism of dolomitic calcite marble. The deposit and its mode of occurrence is described in detail by (Mortensen 1945). According to Dahl (1981) there has here been production during shorter periods covering a time span of several centuries, - more recent ones around 1900 and in the 1930s. All together c. 500 m³ rock has been quarried, most of which has been used as "talc" of various qualities. The talc occurs as pure, pale green and irregularly folded layers, interbedded with layers richer in chlorite or even chlorite and mica. The whole lensoid deposit is surrounded by granites. Remaining talc in the quarry is strongly cracked according to Dahl (1981). According to Mortensen (loc.cit.) minor layers or lenses of serpentine or talc occurs in the marble, but they have always shown to be small and little persistent. Mining has been concentrated basically on these minor accumulations of talc. Bugge (1929) reports up to 60 cm wide bands of light talc within a 5-6 m wide zone of chlorite schist within a 15x15 m cut in the quarry.

Bibliography:
From NGU's Reference Archive:
Mortensen, Odd , 1945
Vannholdige magnesiasilikater dannet ved metasomatose av dolomitiske kalkstener.
;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; Olaf Holtedahl på 60-årsdagen 24. juni 1945.; No.25 (1-4);266-284 pages
Abstract:
In the present paper is described a small area consisting mainly of limestones with comparatively high contents of the hydrous silicates of magnesia, viz. serpentine, talc, and tremolite. Besides the presence of these minerals as an integrating part of the carbonate rocks, they also occur as small rock-forming lenses and layers. The mineralogical composition of some samples of the rocks mentioned is given. These rocks constitute the central part of the area.

Bugge, Arne , 1929
Beretning om arbeidet i 5-årsperioden 1924-28. Geologisk kartlegging. Stipendiereiser. Kraftanlegg. Fundamentering. Brønnboring. Befaringer av mineral og ertsforekomster: asbest og talkum ved Faleide. Iakttagelser mellom Lom og Nordfjord. Erts og mi
;Norges geologiske undersøkelse;ÅRSMELDING; TIDSSKRIFTARTIKKEL;NGU; No.133;11-19 pages


The fact sheet was created on 29.03.2024

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