Norsk versjon
	THE INDUSTRIAL MINERAL DATABASE
	Occurence 3105 - 303 Øby
	(Object Id: 8801) (Last updated: 30.09.2024)

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

Broch (1934) beskriver flere brudd vest for gården Øby. Øby 1: Vannfylt synk med loddrette vegger (over vannspeilet). 8x70 m. Dybden er 15 m på det dypeste. Driften ble startet i 1880-årene. Siste periode med drift var i 1927. Det har primært vært produsert feltspat. Det skal ha blitt funnet beryll i denne pegmatitten. Øby 2: Snaue 100 m NNV for Øby 1 ligger to åpne, vide skjæringer som er forbundet med en kort tunnel og utkjørsel i sydvest. Samlet lengdre er 60 m, bredde 20 m og dybde 6 m. Bruddet ble startet og var i drift samtidig som Øby 1.

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.

Andersen, Olaf , 1926

	Feltspat I. Feltspatmineralenes egenskaper, forekomst og praktiske utnyttelse med særlig henblikk på den norske feltspatindustri.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.128A;1-142 pages

Abstract:

The present publication is a description, in non-technical language, of the properties, geological mode of occurrences, exploitation, and uses of feldspar with special reference to the Norwegian feldspar industry. Systematic descriptions of commercial deposits are reserved for a future publication to be issued as no. 128b of the present series. Chapter 1 contains a general description of the mineralogical, chemical, and physical properties of the various species of the feldspar group. - Table I gives the theoretical chemical composition of mixture of potash feldspar and soda feldspar for intervals of 10 pct. by weight. - Table 2 gives the corresponding figures for mixtures of soda feldspar and lime feldspar. - Table 3 contains a few examples of chemical analyses of feldspar from Norwegian occurrences. The analyses, of which No.s 1-5 are new, represent selected, "pure" feldspar. No.s 1, 2 and 3 are commercial "potash feldspars" from granite pegmatites, No. 4 a soda-potash feldspar from syenite pegmatite, and No. 5 a soda feldspar of commercial quality from a pyroxene bearing granite pegmatite. No.s 6 and 7 are old analyses respectively of oligoclase from granite pegmatite and labradorite from anorthosite. - Table 4 contains multiplication factors for the recalculation of feldspar analyses.

Name of Locality: Øby 1

(Object Id: 39978 303,01,00)

Location

County:

Østfold

Municipality:

Sarpsborg (3105)

Map 1:50000:

Sarpsborg (1913-1)

Map 1:250000:

Oslo

Coordinate system:

EU89-UTM Zone 32

East:

628686 m.

North:

6575336 m.

Longitude:

11.2596700

Latitude:

59.2972690

Show on map

Resource

Resource Type:

Beryllium minerals

Resource Subtype:

Beryl

Name of Locality: Øby 2

(Object Id: 39979 303,02,00)

Location

County:

Østfold

Municipality:

Sarpsborg (3105)

Map 1:50000:

Sarpsborg (1913-1)

Map 1:250000:

Oslo

Coordinate system:

EU89-UTM Zone 32

East:

628663 m.

North:

6575443 m.

Longitude:

11.2593350

Latitude:

59.2982400

Show on map

Resource

Resource Type:

Beryllium minerals

Resource Subtype:

Beryl

---

The fact sheet was created on 12.07.2025

Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no

Copyright © 2025 Geological Survey of Norway