English version
	MALMDATABASEN
	Forekomstområde 623 - 021
	(Sist oppdatert 09.des.2024)

Betydning

Offentlig:

Regional Importance (reg. 10.12.2024)

Economical:

Kan være viktig , (Confirmed 06.mai.2015 by Terje Bjerkgård)

Products

	Element/product	Crude ore grade or quality
	CO	0.2 %

Operations

	From - To	Activity	Comments
	1773 - 1776	Test mining	Company/Institution :Blaafarveværket
	1776 - 1898	Regular production	Company/Institution :Blaafarveværket

Mineralization

	Era:		Period:
	Dating:		Method:
	Genesis:		Form:
	Main texture:		Min. distribution:

Main grain size:

Main alteration:

	Strike/Dip:		Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Period:

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

Group:

Formation:

Bibliography:

From NGU's Reference Archive:

Grorud, Hans-Fredrik , 1997

	Textural and compositional characteristics of cobalt ores from the Skuterud Mines of Modum, Norway

;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.77 (1);31-38 pages

Abstract:

The metasedimentary rocks of the Modum Complex contain concordant, sulphide- rich zones, commonly referred to as 'fahlbands'. Two of these fahlbands contain cobalt minerals. Petrographic and microprobe analyses of the cobalt minerals have been performed on selected samples, to gain insight into the genesis and post-mineralization history of the cobalt minerals. It is suggested that these minerals precipitated from an oxidizing fluid, and that certain minerals in the uraninite.thorianite series precipitated simulataneously. The fahlband silicates, and later the cobalt minerals, were recrystallized during Sveco- norwegian penetrative deformation and thermal maximum (-1.2- -0.9Ga). Prolonged heating during this event eradicated any compositional zoning which may originally have been present. Neither textural nor mineral chemical analyses indicate whether the observed cobalt minerals are the result of a primary precipitation, or of remobilization.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	BU0096.01	Dump	Sampler :T. Bjerkgård/I. Henderson/...Stored :Løkken/...Size(kg) :3 Kommentar :Rich impregnation of chalcopyrite with lesser pyrrhotite, accessory cobalt minerals and molybdenite, in gedrite/anthophyllite rock with some quartz and biotite. No. of registrated element analyses = 1
	BU0096.02	Dump	Sampler :T. Bjerkgård/I. Henderson/...Stored :Løkken/...Size(kg) :3 Kommentar :Pyrrhotite-chalcopyrite impregnation in biotite-bearing quartz-sericite schist with porphyroblasts of sillimanite No. of registrated element analyses = 1
	BU0096.03	Bedrock	Sampler :T. Bjerkgård Kommentar :Co-mineralisering i kvartsittisk bergart i Clarastollen No. of registrated element analyses = 1
	BU0096.04	Bedrock	Sampler :T. Bjerkgård Kommentar :Co-mineralisering i kloritt-rik kvartsittisk bergart i Clarastollen No. of registrated element analyses = 1
	BU0096.05	Bedrock	Sampler :T. Bjerkgård Kommentar :Co-mineralisering i kvartsittisk bergart under dagbrudd No. of registrated element analyses = 1
	BU0096.06	Bedrock	Sampler :T. Bjerkgård Kommentar :Co-mineralisering i kloritt-biotittrik bergart No. of registrated element analyses = 1
	BU0096.07	Bedrock	Sampler :T. Bjerkgård Kommentar :Co-mineralisering i mørk kloritt-biotittrik bergart, Hvalfisken No. of registrated element analyses = 1
	BU0096.08	Bedrock	Sampler :T. Bjerkgård Kommentar :Co-mineralisering i grå, flekkete bergart, Hvalfisken No. of registrated element analyses = 1
	CONSTANTIN-Ø	Bedrock	Sampler :T. Bjerkgård Kommentar :Kobolt-mineralisert skifer No. of registrated element analyses = 1
	HVALFISKEN 1	Bedrock	Sampler :T. Bjerkgård Kommentar :Koboltrik skifer No. of registrated element analyses = 1
	HVALFISKEN 2	Bedrock	Sampler :T. Bjerkgård Kommentar :Koboltrik skifer No. of registrated element analyses = 1
	SKUTERUD-MG1	Bedrock	Sampler :T. Bjerkgård Kommentar :Koboltrik skifer No. of registrated element analyses = 1
	77419	Bedrock	Sampler :T. Bjerkgård Kommentar :Koboltmineralisert skifer No. of registrated element analyses = 1
	77421	Bedrock	Sampler :T. Bjerkgård Kommentar :Kobolt i skifer No. of registrated element analyses = 1

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

Navn på locality : Clara stoll

(Objekt Id : 0623,021,01,00)

---

Lokalisering

Fylke :

Buskerud (06)

Kommune :

Modum (0623)

Kart 1:50000:

Hokksund (1714-1)

Kart 1:250000:

Skien

Markeringspunkt:

Lengdegrad:

9.8679870

Breddegrad:

59.9722010

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-koord:

548453 m.

Y-koord:

6648633 m.

Materialtype

	Hovedtype:	Jernlegeringsmetaller (Cr,Ni,Co,V,Mo,W)	Subtype:	Kobolt
			Element(s):	Co As

Navn på locality : Forhaapningsstoll

(Objekt Id : 0623,021,02,00)

---

Lokalisering

Fylke :

Buskerud (06)

Kommune :

Modum (0623)

Kart 1:50000:

Hokksund (1714-1)

Kart 1:250000:

Skien

Markeringspunkt:

Lengdegrad:

9.8652300

Breddegrad:

59.9722550

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-koord:

548300 m.

Y-koord:

6648637 m.

Materialtype

	Hovedtype:	Jernlegeringsmetaller (Cr,Ni,Co,V,Mo,W)	Subtype:	Kobolt
			Element(s):	Co As

Navn på locality : Dagåpning

(Objekt Id : 0623,021,03,00)

---

Lokalisering

Fylke :

Buskerud (06)

Kommune :

Modum (0623)

Kart 1:50000:

Hokksund (1714-1)

Kart 1:250000:

Skien

Markeringspunkt:

Lengdegrad:

9.8642020

Breddegrad:

59.9719830

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-koord:

548243 m.

Y-koord:

6648606 m.

Materialtype

	Hovedtype:	Jernlegeringsmetaller (Cr,Ni,Co,V,Mo,W)	Subtype:	Kobolt
			Element(s):	Co As

Navn på locality : Stoll

(Objekt Id : 0623,021,04,00)

---

Lokalisering

Fylke :

Buskerud (06)

Kommune :

Modum (0623)

Kart 1:50000:

Hokksund (1714-1)

Kart 1:250000:

Skien

Markeringspunkt:

Lengdegrad:

9.8653300

Breddegrad:

59.9733580

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-koord:

548303 m.

Y-koord:

6648759 m.

Materialtype

	Hovedtype:	Jernlegeringsmetaller (Cr,Ni,Co,V,Mo,W)	Subtype:	Kobolt
			Element(s):	Co As

Navn på locality : Dagåpning

(Objekt Id : 0623,021,05,00)

---

Lokalisering

Fylke :

Buskerud (06)

Kommune :

Modum (0623)

Kart 1:50000:

Hokksund (1714-1)

Kart 1:250000:

Skien

Markeringspunkt:

Lengdegrad:

9.8643830

Breddegrad:

59.9755200

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-koord:

548247 m.

Y-koord:

6649000 m.

Materialtype

	Hovedtype:	Jernlegeringsmetaller (Cr,Ni,Co,V,Mo,W)	Subtype:	Kobolt
			Element(s):	Co As

Navn på locality : Ludvig Eugen stoll

(Objekt Id : 0623,021,06,00)

---

Lokalisering

Fylke :

Buskerud (06)

Kommune :

Modum (0623)

Kart 1:50000:

Hokksund (1714-1)

Kart 1:250000:

Skien

Markeringspunkt:

Lengdegrad:

9.8725940

Breddegrad:

59.9736880

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-koord:

548708 m.

Y-koord:

6648802 m.

Materialtype

	Hovedtype:	Jernlegeringsmetaller (Cr,Ni,Co,V,Mo,W)	Subtype:	Kobolt
			Element(s):	Co As

---

Analyse Results

from

Forekomstområde 623 - 021 Skuterud Mellomgruver

Element analyses

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

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
BU0096.01	Dump	34397	34	2	929	105	.5	2266.0
BU0096.02	Dump	6150	3	4	195	189	.2	132.0
BU0096.03	Bedrock	1695	-10	10	742	69	-1.0	105.0
BU0096.04	Bedrock	1640	-10	-10	145	24	-1.0	7.0
BU0096.05	Bedrock	176	-10	-10	37500	926	-1.0	236.0
BU0096.06	Bedrock	-5	-10	-10	2010	103	-1.0	4.0
BU0096.07	Bedrock	165	20	-10	1450	150	-1.0	3.0
BU0096.08	Bedrock	1845	-10	10	1330	210	-1.0	39.0
CONSTANTIN-Ø	Bedrock	736	22	7	8170	224	.2	150.0
HVALFISKEN 1	Bedrock	358	29	16	10000	1380	.2	351.0
HVALFISKEN 2	Bedrock	221	118	31	10000	1190	.3	116.0
SKUTERUD-MG1	Bedrock	3900	63	18	10000	845	.2	98.0
77419	Bedrock	7420	23	30	1845	158	.7	294.0
77421	Bedrock	5950	12	6	1560	108	.2	118.0

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

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
BU0096.01	1.0	1.0	6	.1	1	9.00		2	8
BU0096.02	1.0	1.0	34	.1	12	16.00		2	2
BU0096.03			2120	-5.0	-50	12.00		-10	-10
BU0096.04			90	-5.0	-50	-5.00		-10	10
BU0096.05			53800	-5.0	50	13.00		-10	-10
BU0096.06			1750	-5.0	110	-5.00		-10	-10
BU0096.07			1230	-5.0	-50	18.00		-10	-10
BU0096.08			19900	-5.0	-50	-5.00		-10	-10
CONSTANTIN-Ø			9110	-.1	50	20.00	-1	-1	-1
HVALFISKEN 1			61400	.3	70	10.00	-1	1	-1
HVALFISKEN 2			40900	.5	30	4.00	-1	-1	-1
SKUTERUD-MG1			5930	.3	30	137.00	-1	-1	-1
77419			3170	.2	60	17.00	1	-1	1
77421			2440	-.1	110	7.00	-1	-1	-1

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

Sample No.	Se*	Ga*	Ge*	In*	S%	V*	Cr*	Mn*	Fe%
BU0096.01					3.63	1	23	67	5.56
BU0096.02					2.83	50	76	60	4.19
BU0096.03					.80	62	200	110	2.40
BU0096.04					1.20	25	234	100	2.65
BU0096.05					2.38	28	100	180	2.52
BU0096.06					.12	232	136	300	8.47
BU0096.07					.26	193	110	240	9.38
BU0096.08					1.65	30	244	70	2.85
CONSTANTIN-Ø	-1.00	11.00	-1.00	-1.00		61	274	160	4.25
HVALFISKEN 1	5.00	9.00	-1.00	-1.00		47	227	109	4.01
HVALFISKEN 2	4.00	10.00	-1.00	-1.00		63	327	148	3.40
SKUTERUD-MG1	13.00	13.00	-1.00	-1.00		70	123	151	18.10
77419	3.00	15.00	-1.00	-1.00		53	220	143	8.53
77421	4.00	12.00	-1.00	-1.00		111	233	83	3.34

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

Sample No.	Th*	U*	W*	Sr*	La*	B*	P*	Sc*	Ti*
BU0096.01	1.00	4.00	1	2.0	1.00	4
BU0096.02	5.00	4.00	1	3.0	18.00	5
BU0096.03								5.00	-500
BU0096.04								-5.00	1000
BU0096.05								-5.00	2300
BU0096.06								20.00	8300
BU0096.07								9.00	1700
BU0096.08								-5.00	-500
CONSTANTIN-Ø	8.00	10.00	-1				60	9.00	3210
HVALFISKEN 1	6.00	3.00	-1				140	9.00	2610
HVALFISKEN 2	6.00	9.00	-1				70	9.00	3650
SKUTERUD-MG1	5.00	36.00	-1				90	9.00	2960
77419	13.00	116.00	-1				210	8.00	4210
77421	8.00	7.00	1				2000	10.00	2440

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

Sample No.	Te*	Hf*
BU0096.01
BU0096.02
BU0096.03
BU0096.04
BU0096.05
BU0096.06
BU0096.07
BU0096.08
CONSTANTIN-Ø	-1.00	8.00
HVALFISKEN 1	1.00	6.00
HVALFISKEN 2	1.00	8.00
SKUTERUD-MG1	2.00	8.00
77419	-1.00	9.00
77421	-1.00	3.00

---

Faktaarket ble generert 19.06.2026

Spørsmål eller kommentarer vedrørende faktaarket kan mailes til: ressursdatabaser@ngu.no

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