Fact Sheet for Deposit Area 623

					Norsk versjon
	THE ORE DATABASE
	Deposit Area 623 - 028
	(Last updated 16.mar.2020)

Name of Deposit Area : Svartfjell

(Object Id : 0623,028,00,00)

The deposit area belongs to the Province : Modum Vest

Location

County :

Buskerud (06)

Municipality :

Modum (0623)

Map 1:50000:

Krøderen (1715-2)

Map 1:250000:

Hamar

Marking point:

Longitude:

9.8245510

Latitude:

60.0437510

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

545930 m.

Y-coord:

6656570 m.

Commodity

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

Production

Activity:	Mining	Reserves:
Prod. method:	Open pit and underground mining	Production:
Prod. status:	Disused, closed	Volume of dump:

Importance

Public: Not Assessed (reg. 18.02.2015)

Economical: Not classified/evaluated , (Confirmed 19.sep.2001 by Terje Bjerkgård)

Historical: Yes , (Confirmed 19.sep.2001 by Terje Bjerkgård)

Mineralization

Era: Proterozoic Period: Mesoproterozoic

Dating: Method:

Genesis: Unknown Form: Lens

Main texture: Structureless Min. distribution: Disseminated (<20 % ore minerals)

Main grain size: Medium grained (1-3 mm) Main alteration:

Strike/Dip: 182 / 85 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Proterozoic Period: Mesoproterozoic

Province: South Norwegian Basement Province

Geotec.unit: Kongsberg Complex

Tectonic complex: Modum Complex

Igneous complex:

Group: Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Amphibole Major mineral (>10%)

Gangue mineral Biotite Major mineral (>10%)

Gangue mineral Feldspar Major mineral (>10%)

Ore mineral Cobaltite Major mineral (>10%)

Ore mineral Chalcopyrite Major mineral (>10%)

Lithology:

Relationship Rock Origin

Host rock Quartzite Sedimentary
Original rock :Quartz sandstone

Metamorphic facies :Amphibolite

Host rock Quartz-mica schist Sedimentary
Original rock :Siltstone

Metamorphic facies :Amphibolite

Host rock Amphibolite Intrusive
Original rock :Dolerite

Metamorphic facies :Amphibolite

Structures

Location: Type: Orientation(360 gr.): Relation to min.:

Host rock Foliation Strike/Dip :185 / 85 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Den gamle gruveveien kan følges opp fra Elistua ved Snarumselva opp til Svartfjell koboltgruve som ligger på toppen av åsen Svartfjellet. Det er her drevet to dype skjæringer over en total lengde på ca. 220 m i nord-nør retning. Den nordlige skjæringen er ca. 120 m lang, mens den sørlige er ca. 90 m lang. Det er 7-8 m langt parti mellom skjæringene hvor det ikke er drevet. Den sørligste skjæringen er den dypeste og er minst 50 m dyp i en strosse i øst. Dette er verifisert ved at en stoll går inn i skjæringen på 50 meters dyp. Den er drevet inn 125 m mot SØ og minst 50 m lenger ned en dagoverflaten ved sørenden av skjæringen. Det går også en stoll inn fra nord inn i den nordlige skjæringen. Den går inn 30 m under dagoverflaten ved nordenden av denne skjæringen. Begge disse stollene er fyrsatte. Co-Cu-As mineraliseringene finnes disseminert og i tynne striper i glimmerførende, kvartsittisk bergart og i amfibolitt, som dels er albittisert. Den mineraliserte sonen er 1-2 m bred. I nordenden av den sørlige skjæringen opptrer en gjennomskjærende pegmatittiske ganger som også fører noe molybdenglans.

Fieldsamples

Sample No. Sample type Miscellanrous

BU0103.01 Bedrock

Sampler :T. Bjerkgård/...Stored :Løkken/...Size(kg) :3

Comment :Weak pyrite impregnation in silicified wall rock. Frequent mm-sized amphibole needles.

No. of registrated element analyses = 1

BU0103.02 Dump

Sampler :T. Bjerkgård/...Stored :Løkken/...Size(kg) :3

Comment :Weak impregnation of cobalt minerals in quartz and seritic quartz schist. Collection of small dump samples.

No. of registrated element analyses = 1

BU0103.03 Dump

Sampler :T. Bjerkgård/...Stored :Løkken/...Size(kg) :3

Comment :Rich pyrite impregnation with minor chalcopyrite in amphibole-chlorite schist.

No. of registrated element analyses = 1

BU0103.04 Dump

Sampler :T. Bjerkgård/...Stored :Løkken/...Size(kg) :3

Comment :Weak pyrrhotite-chalcopyrite impregnation in quartz-sericite schist.

No. of registrated element analyses = 1

BU0103.05 Dump

Sampler :J.S. Sandstad

Comment :Biotite-bearing quartz-pegmatite with diss. arsenopyrite, chalcopyrite and molybdenite

No. of registrated element analyses = 1

BU0103.06 Dump

Sampler :J.S. Sandstad

Comment :Co-apy-cpy mineralised amphibolite

No. of registrated element analyses = 1

BU0103.07 Dump

Sampler :J.S Sandstad

Comment :cpy-apy-Co diss. in laminated quartzitic rock

No. of registrated element analyses = 1

JSA_55 Bedrock

Sampler :J.S. Sandstad

Comment :Ore quartzite, py-po diss in fine grained grey quartzite and Co-As-Cu min in amphibol rich band 1cm

No. of registrated element analyses = 1

64941 Bedrock

Sampler :T. Bjerkgård

Comment :Co-As-Cu mineralised rock

No. of registrated element analyses = 1

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

Name of Locality : Nordende av strosse

(Object Id : 0623,028,01,00)

Location

County : Buskerud (06) Municipality : Modum (0623)

Map 1:50000: Krøderen (1715-2) Map 1:250000: Hamar

Marking point: Longitude: 9.8244520 Latitude: 60.0448020

EU89-UTM Zone 32

X-coord: 545923 m. Y-coord: 6656686 m.

Commodity

Main Type: Ferroalloys (Cr,Ni,Co,V,Mo,W) Sub Type: Cobalt

Element(s): Co As

Name of Locality : Sørende av strosse

(Object Id : 0623,028,02,00)

Location

County : Buskerud (06) Municipality : Modum (0623)

Map 1:50000: Krøderen (1715-2) Map 1:250000: Hamar

Marking point: Longitude: 9.8246920 Latitude: 60.0429420

EU89-UTM Zone 32

X-coord: 545938 m. Y-coord: 6656480 m.

Commodity

Main Type: Ferroalloys (Cr,Ni,Co,V,Mo,W) Sub Type: Cobalt

Element(s): Co As

Name of Locality : Sørstoll

(Object Id : 0623,028,03,00)

Location

County : Buskerud (06) Municipality : Modum (0623)

Map 1:50000: Krøderen (1715-2) Map 1:250000: Hamar

Marking point: Longitude: 9.8259980 Latitude: 60.0420360

EU89-UTM Zone 32

X-coord: 546012 m. Y-coord: 6656380 m.

Commodity

Main Type: Ferroalloys (Cr,Ni,Co,V,Mo,W) Sub Type: Cobalt

Element(s): Co As

Production

Activity: Mining Reserves:

Prod. method: Underground mining Production:

Prod. status: Volume of dump:

Information(s) in free text format

Free text

Inngangen til stollen er i brattskråningen sør for dagskjæringene. Stollen har ca. retning 330º og er ca. 120 m lang. Lengst nord ender den i et ras som antagelig er tilknyttet bunnen av den sørlige dagskjæringen. To mindre tverrslag er drevet mot vest inne i stollen. Sonen følger en kvartsittisk bergart som dels er glimmerførende. Den mineraliserte sonen er opptil 2 m bred, og de rikeste sulfidmineraliseringene ser ut til å opptre i glimmerrike soner i kvartsitten.

Fieldsamples

Sample No. Sample type Miscellanrous

BU0103.08 Bedrock

Sampler :J.S Sandstad

Comment :Co-apy-cpy mineralisation in foliated quartz-feldspar-mica schist

No. of registrated element analyses = 1

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

Name of Locality : Nordstoll

(Object Id : 0623,028,04,00)

Location

County : Buskerud (06) Municipality : Modum (0623)

Map 1:50000: Krøderen (1715-2) Map 1:250000: Hamar

Marking point: (No coordinates)

Commodity

Main Type: Ferroalloys (Cr,Ni,Co,V,Mo,W) Sub Type: Cobalt

Element(s): Co As

Analyse Results

from

Deposit Area 623 - 028 Svartfjell

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#

BU0103.01 Bedrock 2242 7 2 499 177 .2 59.0

BU0103.02 Dump 738 8 3 4518 524 .2 50.0

BU0103.03 Dump 3705 7 13 318 573 .2 154.0

BU0103.04 Dump 67 4 13 219 117 .2 8.0

BU0103.05 Dump 351 10 -10 19 24 -1.0 2.0

BU0103.06 Dump 4510 -10 -10 5510 1345 1.0 318.0

BU0103.07 Dump 3520 -10 -10 1815 687 -1.0 323.0

BU0103.08 Bedrock 811 -10 -10 980 259 -1.0 34.0

JSA_55 Bedrock 1850 3 5 1825 259 .5 77.0

64941 Bedrock 1640 13 3 2130 740 .3 141.0

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

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

BU0103.01 2.0 5.0 34 .1 3 6.00 2 2

BU0103.02 2.0 34.0 38636 .2 16 9.00 2 2

BU0103.03 2.0 1.0 1711 .6 10 25.00 2 2

BU0103.04 3.0 3.0 192 .1 5 12.00 2 2

BU0103.05 710 -5.0 90 445.00 -10 10

BU0103.06 34000 -5.0 -50 10.00 -10 30

BU0103.07 13200 -5.0 -50 33.00 -10 -10

BU0103.08 2070 -5.0 -50 33.00 -10 10

JSA_55 -5.0 3.0 4990 -.1 60 6.00 -1 -1 -1

64941 -5.0 1.0 18200 -.1 40 19.00 -1 -1 -1

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

Sample No. Se* Ga* Ge* In* S% V* Cr* Mn* Fe%

BU0103.01 2.83 10 35 54 3.77

BU0103.02 1.88 31 101 34 4.23

BU0103.03 6.62 96 32 264 12.34

BU0103.04 1.49 146 120 38 2.74

BU0103.05 .33 30 221 290 2.52

BU0103.06 4.37 109 159 110 7.54

BU0103.07 2.88 251 191 80 4.98

BU0103.08 .89 430 162 80 2.54

JSA_55 4.00 16.00 -1.00 -1.00 110 29 60 4.14

64941 8.00 5.00 -1.00 -1.00 177 136 360 16.80

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

Sample No. Th* U* W* Sr* La* B* P* Sc* Ti*

BU0103.01 1.00 4.00 1 1.0 5.00 2

BU0103.02 4.00 4.00 1 5.0 15.00 20

BU0103.03 8.00 49.00 1 4.0 22.00 2

BU0103.04 8.00 4.00 1 3.0 11.00 3

BU0103.05 5.00 2300

BU0103.06 -5.00 800

BU0103.07 6.00 1500

BU0103.08 9.00 1800

JSA_55 6.00 4.00 -1 2450 10.00 1910

64941 -1.00 2.00 -1 90 35.00 950

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

Sample No. Te* Hf*

BU0103.01

BU0103.02

BU0103.03

BU0103.04

BU0103.05

BU0103.06

BU0103.07

BU0103.08

JSA_55 -1.00 5.00

64941 -1.00 1.00

Era:	Proterozoic	Period:	Mesoproterozoic
Dating:		Method:
Genesis:	Unknown	Form:	Lens
Main texture:	Structureless	Min. distribution:	Disseminated (<20 % ore minerals)

	Province:	South Norwegian Basement Province
	Geotec.unit:	Kongsberg Complex
	Tectonic complex:	Modum Complex
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Amphibole	Major mineral (>10%)
Gangue mineral	Biotite	Major mineral (>10%)
Gangue mineral	Feldspar	Major mineral (>10%)
Ore mineral	Cobaltite	Major mineral (>10%)
Ore mineral	Chalcopyrite	Major mineral (>10%)

Relationship	Rock	Origin
Host rock	Quartzite	Sedimentary Original rock :Quartz sandstone
		Metamorphic facies :Amphibolite
Host rock	Quartz-mica schist	Sedimentary Original rock :Siltstone
		Metamorphic facies :Amphibolite
Host rock	Amphibolite	Intrusive Original rock :Dolerite
		Metamorphic facies :Amphibolite

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Foliation	Strike/Dip :185 / 85	Post-mineralisation ;...Effect :Modifies

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
BU0103.01	Bedrock	2242	7	2	499	177	.2	59.0
BU0103.02	Dump	738	8	3	4518	524	.2	50.0
BU0103.03	Dump	3705	7	13	318	573	.2	154.0
BU0103.04	Dump	67	4	13	219	117	.2	8.0
BU0103.05	Dump	351	10	-10	19	24	-1.0	2.0
BU0103.06	Dump	4510	-10	-10	5510	1345	1.0	318.0
BU0103.07	Dump	3520	-10	-10	1815	687	-1.0	323.0
BU0103.08	Bedrock	811	-10	-10	980	259	-1.0	34.0
JSA_55	Bedrock	1850	3	5	1825	259	.5	77.0
64941	Bedrock	1640	13	3	2130	740	.3	141.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
BU0103.01	2.0	5.0	34	.1	3	6.00		2	2
BU0103.02	2.0	34.0	38636	.2	16	9.00		2	2
BU0103.03	2.0	1.0	1711	.6	10	25.00		2	2
BU0103.04	3.0	3.0	192	.1	5	12.00		2	2
BU0103.05			710	-5.0	90	445.00		-10	10
BU0103.06			34000	-5.0	-50	10.00		-10	30
BU0103.07			13200	-5.0	-50	33.00		-10	-10
BU0103.08			2070	-5.0	-50	33.00		-10	10
JSA_55	-5.0	3.0	4990	-.1	60	6.00	-1	-1	-1
64941	-5.0	1.0	18200	-.1	40	19.00	-1	-1	-1

Sample No.	Se*	Ga*	Ge*	In*	S%	V*	Cr*	Mn*	Fe%
BU0103.01					2.83	10	35	54	3.77
BU0103.02					1.88	31	101	34	4.23
BU0103.03					6.62	96	32	264	12.34
BU0103.04					1.49	146	120	38	2.74
BU0103.05					.33	30	221	290	2.52
BU0103.06					4.37	109	159	110	7.54
BU0103.07					2.88	251	191	80	4.98
BU0103.08					.89	430	162	80	2.54
JSA_55	4.00	16.00	-1.00	-1.00		110	29	60	4.14
64941	8.00	5.00	-1.00	-1.00		177	136	360	16.80

Sample No.	Th*	U*	W*	Sr*	La*	B*	P*	Sc*	Ti*
BU0103.01	1.00	4.00	1	1.0	5.00	2
BU0103.02	4.00	4.00	1	5.0	15.00	20
BU0103.03	8.00	49.00	1	4.0	22.00	2
BU0103.04	8.00	4.00	1	3.0	11.00	3
BU0103.05								5.00	2300
BU0103.06								-5.00	800
BU0103.07								6.00	1500
BU0103.08								9.00	1800
JSA_55	6.00	4.00	-1				2450	10.00	1910
64941	-1.00	2.00	-1				90	35.00	950