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THE INDUSTRIAL MINERAL DATABASE
Occurence 3120 - 372 Stordalen (Sandaker 3)
(Object Id: 8908)
(Last updated: 27.04.2007)

Location
County: Østfold Municipality: Rakkestad (3120)
Map 1:50000: Sarpsborg (1913-1) Map 1:250000: Oslo
Coordinate system: EU89-UTM Zone 32 (Coordinates NOT confirmed)
East: 637718 m. North: 6593692 m.
Longitude: 11.4298660 Latitude: 59.4591140
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Resource
Resource Type: Feldspar Resource Subtype: Pegmatitic feldspar

Importance
Raw material meaning: Little Importance (reg. 18.02.2015)


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:

Information(s) in free text format
Free text
Forekomsten skal ligge i Stordalen ca. 2.5 km sørøst for Sandaker. her skal det ligge et feltspatbrudd bortgjemt i skogen, 4-6m bred 2-3 meter dypt. og 10 m langt. pegmatitten har en central kvarts kjerne med 0.5 meter brede krystaller av k-feltspat, langs yttergrensen er det en 30cm tykk randsone av albitt. Gruvan var i drift ca. 1986-97

Bibliography:
From NGU's Reference Archive:
Broch, Olaf Anton , 1934
Feltspat IV. Forekomster i Akershus og Østfold øst for Glomma.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.141;1-119 pages
Abstract:
In this publication, which is a sequel to Feltspat II and III by Olaf Andersen and Tom F.W. Barth, brief and exoteric descriptions and some information on production and history are given of about 180 individual feldspar, quartz, and mica deposits, all of them situated east of the river Glomma in south-eastern Norway. Particulars of purely geological or mineralogical interest are few; most of them are given as footnotes or in the preface, but the minerals of each deposit, exceot quartz, feldspar and mica, are listed. The deposits are cross cutting pegmatite dikes, with a northeastern strike and a steep dip. The dikes exhibit a marked zoning; moreover, they are remarkably free from rare minerals, the occurrences of which seems to be restricted almost entirely to the dikes near the Idefjord (Bohus) granite.


The fact sheet was created on 29.03.2024

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