Fact Sheet for Deposit Area 123

					Norsk versjon
	THE ORE DATABASE
	Deposit Area 123 - 001
	(Last updated 08.okt.2025)

Name of Deposit Area : Fossum

(Object Id : 0123,001,00,00)

Location

County :

Østfold (01)

Municipality :

Spydeberg (0123)

Map 1:50000:

Askim (1914-2)

Map 1:250000:

Oslo

Marking point:

Longitude:

11.0958360

Latitude:

59.6032170

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

618284 m.

Y-coord:

6609090 m.

Commodity

	Main Type:	Ferroalloys (Cr,Ni,Co,V,Mo,W)	Sub Type:	Nickel
			Element(s):	Ni Cu

Production

Activity:	Pitting	Reserves:
Prod. method:		Production:
Prod. status:		Volume of dump:

Importance

Public: Little Importance (reg. 18.02.2015)

Economical: Minor interest , (Confirmed 16.feb.2005 by Havard Gautneb)

Mineralization

Era: Proterozoic Period: Mesoproterozoic

Dating: Method:

Genesis: Orthomagmatic formation Form:

Main texture: Min. distribution:

Main grain size: Main alteration:

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Proterozoic Period: Mesoproterozoic

Province: East Norwegian Basement Province

Geotec.unit: Østfold Complex

Tectonic complex:

Igneous complex:

Group: Formation:

Information(s) in free text format

Free text

Skjerpet ligger rett sør for en sti fra den gamle brua over Glomma, gjennom de gamle festningene og nordover fram mot Søndre Fossum gård. Det består av et gjengrodd, lite skjerp på 3 x 3 m med en opptil 2,5 m høy vegg i sør. I skjerpet, som domineres av en kvarts-biotitt rik bergart, er det svært få sulfider å se, bare en svak disseminasjon av magnetkis ble påvist. Tett ved stien, rett utenfor skjerpet lå det en større blokk (30x50x20 cm) med aggregater, strenger og disseminasjon av kobberkis og magnetkis i middelskornet kvarts-biotitt rik metagabbro. I følge Rekstad (1921) er arbeidet som ble utført gjort av de samme som drev gruva i Romsås.

Location

Skov Larsens (1972) skriver at "Skjerpet findes umiddelbart syd for den sti der fører fra den gamle bro til den sydøstligste af Fossum-gårdene. Det er ca 150-200 m sydøst for gården." Koordinatene som oppgis er derimot til Fossum ved Askim og ikke Spydeberg. Flyttet fra EU89 UTM sone 33 280021 6613927 basert på overnevnte beskrivelse og DTM1.

Photo(s) from the Deposit area:

Photo no. 1 showing Fossum skjerp"

Bibliography:

From NGU's Reference Archive:

, 1940

Aktenvermerk uber Nickelerz-Vorkommen in Smålenene.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 1585;2 pages

Abstract:

Notatet gir opplysninger om nikkel-magnetkisforekomster i Smålenene, Spydeberg, Hobøl, Skiptvedt, Svendal, Rakkestad, Eidsberg, Trøgstad og Askim.

Foslie, Steinar , 1925

Syd-Norges gruber og malmforekomster.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.126;1-89 + ka pages

Abstract:

On the map accompanying this paper all the mines and ore deposits of Southern Norway are collected for the first time.The material has been gathered from printed and unprinted sources, communications from mining engineers and geologists, and through personal visits. Included are all mines and ore deposits of former, present and future importance. Among the 1407 deposits on the map, there are furthermore included all of doubtful value and many which are quite unworkable, but of geological interest, or those which mark the distribution of ore bearing formations. For this reason it has been necessary to mark the deposits with signs of different size. The object is only to facilitate a comprehensive view of the map, and is not an effort of economic classification, which for most of them would be quite impossible. The sizes refer to the presumed importance of the ore deposit, and has nothing to do with the extent of the mining operations. Mines and deposits out of work during the period 1913-1923 have been separately marked (see the legend), also deposits which were formerly of much greater importance than now. For the smallest mines and deposits no distinction has been made in these respects. Among them are represented partly those, which are in reality unworkable, partly those which are little investigated.

Rekstad, J. , 1921

Eidsberg. De geologiske forhold innen rektangelkartet Eidsbergs område

;Norges geologiske undersøkelse;KARTBESKRIVELSE; BOK;NGU; No.88;76 pages

Abstract:

The territory is situated in south-eastern Norway to the east of the Oslofjord. It is an inland district which at no place reaches the sea. Glomma is the chief river which runs through the country in a southerly direction. The rocks occurring here are gneiss, granite, gabbro and schistose amphibolite, all of them of Archean age. Gneiss occupies a large area of the region. The rock has a varied appearance. Partly it is rich in mica (mica gneiss), partly it contains hornblende (hornblende-gneiss), partly it is coarse-grained and of granitoid texture. This latter form embraces also granite which has been deformed by powerful mechanical forces. This granite is intermixed with the gneiss in such a way as to make it impossible to separate them on the map. For the most part there is no distinctive demarcation between them, but the one passes into the other. The gneiss is mostly stratified, with well defined strike and dip. The granite intermixed is younger than the gneiss, but it belongs to the oldest known granites of Scandinavia. The gneiss is for the most part of igneous origin. Gabbro and amphibolite occur as numerous lenses injected into the gneiss. Connected with the gabbro here occurs nickelferous pyrrhotite. The greatest of these occurrences is at Romsås.

Fieldsamples

Sample No. Sample type Miscellanrous

Fossum01 Bedrock

Sampler :Mansur/Sandstad/...Stored :Løkken/...Size(kg) :2

Comment :Weak pyrrhotite dissemination in biotite-quartz rock

No. of registrated element analyses = 1

Fossum02 Dump

Sampler :Mansur/Sandstad/...Stored :Løkken/...Size(kg) :2

Comment :Chalcopyrite+pyrrhotite aggregates/veins in biotite-rich metagabbro

No. of registrated element analyses = 1

NB! All analyse values are shown at the end of the printout.:

Analyse Results

from

Deposit Area 123 - 001 Fossum

Element analyses
( *=parts pr. million, #=parts pr.billion, Negative values means below detection limit value.)

Sample No. Sample Type Cu* Zn* Pb* Co* Ag* Au# Pt#

Fossum01 Bedrock 1985 195 7 160 1.2 11.0 2.5

Fossum02 Dump 4170 260 5 200 2.3 15.0 2.5

------------------

Sample No. Pd# As* Cd* Ba* Mo* Sn* Sb* Bi* Se*

Fossum01 15.0 0 .4 170 26.40 0 0 1 9.00

Fossum02 5.0 0 .3 160 13.95 0 0 0 7.00

------------------

Sample No. Ga* Ge* In* V* Cr* Mn* Fe% Th* U*

Fossum01 18.15 0.22 0.14 255 236 1325 17.10 5.87 1.20

Fossum02 21.50 0.25 0.16 404 474 730 20.60 4.06 1.40

------------------

Sample No. W* Rb* Sr* Y* Zr* Nb* Ta* Cs* La*

Fossum01 0 146.0 66.5 48.2 172 5.90 0.32 3.52 19.80

Fossum02 0 204.0 15.2 24.5 267 8.20 0.45 5.10 11.30

------------------

Sample No. Ce* Li* Be* P* Sc* Te* Hf* Re* Tl*

Fossum01 41.50 31 3 110 28.00 0.59 4.90 24 1

Fossum02 26.00 40 1 50 22.30 0.61 7.60 19 1

Era:	Proterozoic	Period:	Mesoproterozoic
Dating:		Method:
Genesis:	Orthomagmatic formation	Form:
Main texture:		Min. distribution:

	Province:	East Norwegian Basement Province
	Geotec.unit:	Østfold Complex
	Tectonic complex:
	Igneous complex:

	Abstract:
	Notatet gir opplysninger om nikkel-magnetkisforekomster i Smålenene, Spydeberg, Hobøl, Skiptvedt, Svendal, Rakkestad, Eidsberg, Trøgstad og Askim.

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ag*	Au#	Pt#
Fossum01	Bedrock	1985	195	7	160	1.2	11.0	2.5
Fossum02	Dump	4170	260	5	200	2.3	15.0	2.5

Sample No.	Ga*	Ge*	In*	V*	Cr*	Mn*	Fe%	Th*	U*
Fossum01	18.15	0.22	0.14	255	236	1325	17.10	5.87	1.20
Fossum02	21.50	0.25	0.16	404	474	730	20.60	4.06	1.40

Sample No.	W*	Rb*	Sr*	Y*	Zr*	Nb*	Ta*	Cs*	La*
Fossum01	0	146.0	66.5	48.2	172	5.90	0.32	3.52	19.80
Fossum02	0	204.0	15.2	24.5	267	8.20	0.45	5.10	11.30

Sample No.	Ce*	Li*	Be*	P*	Sc*	Te*	Hf*	Re*	Tl*
Fossum01	41.50	31	3	110	28.00	0.59	4.90	24	1
Fossum02	26.00	40	1	50	22.30	0.61	7.60	19	1