Fact Sheet for <b>Occurence 1122

					Norsk versjon
	THE ORE DATABASE
	Occurence 1122 - 002 Oltesvik
	(Object Id: 4930) (Last updated: 25.02.2005)

Location

County:

Rogaland

Municipality:

Gjesdal (1122)

Map 1:50000:

Høle (1212-1)

Map 1:250000:

Mandal

Coordinate system:

EU89-UTM Zone 32

East:

333749 m.

North:

6527020 m.

Longitude:

6.1181840

Latitude:

58.8508180

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Resource

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

Importance

Raw material meaning:

Little Importance (reg. 18.02.2015)

Resources and production

	Activity:	Test mining	Reserves:
	Operating method:	Open pit and underground mining	Historical production:

Operations

From - To Activity Comments

2000 - 2000 Sampling Company/Institution :NGU

Mineralization

Era: Proterozoic Period: Mesoproterozoic

Genesis: Orthomagmatic formation Form: Irregular

Main texture: Structureless Min. distribution: Semi-massive (20-50 % ore minerals)

Main grain size: Medium grained (1-3 mm) Main alteration: No country rock alteration

Strike/Dip: 220 / 35 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Proterozoic Period: Mesoproterozoic

Province: South Norwegian Basement Province

Geotec.unit: Agder Complex

Tectonic complex:

Igneous complex:

Group: Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Amphibole Major mineral (>10%)

Gangue mineral Feldspar Major mineral (>10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Ore mineral Pentlandite Accessory mineral (<1%)

Lithology:

Relationship Rock Origin

Host rock Banded gneis Intrusive

Metamorphic facies :Granulite

Host rock Amphibolite Intrusive
Original rock :Gabbro

Metamorphic facies :Granulite

Wall rock Granitic gneiss Intrusive
Original rock :Granite

Metamorphic facies :Granulite

Structures

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

Host rock Foliation Strike/Dip :225 / 25 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

The deposit is located in an E facing meadow, 150-170 meters above sea level, right above the crusher installation and the power station at Oltesvika. The tailings are easily seen from the road. The ore has been extracted from five pits over a 65m stretch along the NE-SW strike. The geographic coordinates refer to the longest adit at the NE end. A water filled shaft is 4m S of that, and another 25m SW, an 8m deep adit was driven. The southmost extraction pit is about 40m SW and has a short adit just over it. The tailings are deposited downhill of the extraction sites. The country rock consists of gneiss with alternating light quartzo-felspathic bands and darker more amphibolitic bands. The sulphide mineralization is mainly restricted to these amphibolite bands that may reach 4-5m thickness with locally sub-ophitic texture. Particularly around the SW extraction sites, the amphibolite has an ophitic texture. The main adit is 1.2m wide, 1.5m high and 15m deep oriented at 306E. The amphibolite ore zone is about 1.5-2m thick (220/030), subparallel to the gneiss foliation (225/025). The ore consists of irregular lenses and lumps of massive pyrrhotite and minor chalcopyrite, in addition to disseminated sulphides. The massive pyrrhotite is medium grained and up to 0.5m thick and may have brecciated structure bearing rounded amphibolite fragments (sample 01, ¿Durchbewegt¿). Chalcopyrite preferably occurs in short veins or strands, partly in the amphibolite, partly in the massive sulphide.

Photo(s) from the Deposit area:

Photo no. 1 showing Hovedstollen i Oltesvik"

Photo no. 2 showing Not spesified"

Bibliography:

From NGU's Reference Archive:

Smith, H. H. , 1913

Seljeraasen og Oltesvik forekomster.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 2909;3 pages

Abstract:

Mineraliseringen opptrer i gabbro og presset gabro-skifer som uregelmessige masser, klumper og nyrer av nikkelholdig magnetkis og noe kobberkis. Forekomstene er for fattig til å ha økonomisk verdi.

Fieldsamples

Sample No. Sample type Miscellanrous

RO0058.01 Bedrock

Sampler: J.S. Sandstad/...Stored: Løkken

Comment: Massiv, middelskornet magnetkis med litt kobberkis tilknytta runde amfibolittfragmenter, fast fjell Hovedstollen

No. of registrated element analyses = 1

RO0058.02 Bedrock

Sampler: J.S. Sandstad/...Stored: Løkken

Comment: Magnetkis aggregater og moderat-kraftig disseminasjon, enkelte kobberkis-årer i amfibolitt, fast fjell Synk

No. of registrated element analyses = 1

RO0058.03 Bedrock

Sampler: J.S. Sandstad/...Stored: Løkken

Comment: Massiv, fin-middelskornet magnetkis+kobberkis malm med få fragmenter, fast fjell Synk

No. of registrated element analyses = 1

RO0058.08 Bedrock

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

Comment: Pyrite on fractures and pyrrhotite-chalcopyrite veinlets in fine- to medium grained, banded gneiss

No. of registrated element analyses = 1

RO0058.09 Bedrock

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

Comment: Amphibolite with weak-strong dissemination of pyrrhotite+chalcopyrite and medium grained apatite veinlets

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

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

Name of Locality: Oltesvik 2

(Object Id: 10660 2,01,00)

Location

County: Rogaland Municipality: Gjesdal (1122)

Map 1:50000: Høle (1212-1) Map 1:250000: Mandal

Coordinate system: EU89-UTM Zone 32

East: 333739 m. North: 6527004 m.

Longitude: 6.1180220 Latitude: 58.8506790

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Resource

Resource Type: Ferroalloys (Cr,Ni,Co,V,Mo,W) Resource Subtype: Nickel

Element(s): Ni Cu

Resources and production

Activity: Test mining Reserves:

Operating method: Underground mining Historical production:

Mineralogy

Relationship Mineral Amount

Gangue mineral Feldspar Major mineral (>10%)

Gangue mineral Amphibole Major mineral (>10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Ore mineral Pentlandite Accessory mineral (<1%)

Lithology:

Relationship Rock Origin

Host rock Amphibolite Intrusive
Original rock :Gabbro

Metamorphic facies :Granulite

Host rock Banded gneiss Intrusive

Metamorphic facies :Granulite

Information(s) in free text format

Free text

En 8 m lang stoll ligger 25 m sørvest for hovedstollen og 10 m høyere i terrenget. Bergarten i stollveggene er svært rustfarget og forvitret, men ser ut til å være dominert av amfibolitt med varierende sulfiddisseminasjon, både magnetkis og pyritt. Massiv kis er ikke påvist i fast fjell, men en prøve fra tippen består av finkornet, semi-massivt bånd med pyritt i amfibolittiske bergart (.04).

Fieldsamples

Sample No. Sample type Miscellanrous

RO0058.04 Dump

Sampler: J.S. Sandstad/...Stored: Løkken

Comment: Semi-massive bånd og aggregater/disseminasjon av pyritt i grønn finkornet bergart.

No. of registrated element analyses = 1

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

Name of Locality: Oltesvik 3

(Object Id: 10661 2,02,00)

Location

County: Rogaland Municipality: Gjesdal (1122)

Map 1:50000: Høle (1212-1) Map 1:250000: Mandal

Coordinate system: EU89-UTM Zone 32

East: 333714 m. North: 6526984 m.

Longitude: 6.1176040 Latitude: 58.8504900

Show on map

Resource

Resource Type: Ferroalloys (Cr,Ni,Co,V,Mo,W) Resource Subtype: Nickel

Element(s): Ni Cu

Resources and production

Activity: Test mining Reserves:

Operating method: Underground mining Historical production:

Mineralogy

Relationship Mineral Amount

Gangue mineral Amphibole Major mineral (>10%)

Gangue mineral Feldspar Major mineral (>10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Ore mineral Pentlandite Accessory mineral (<1%)

Lithology:

Relationship Rock Origin

Host rock Amphibolite Intrusive
Original rock :Gabbro

Metamorphic facies :Granulite

Information(s) in free text format

Free text

Lokaliteten består av en 7 m lang stoll med retning 305° og et innslaget som er 2 m dypt og 3 m langt i retning N-S, 5 m nedenfor denne. Begge er anlagt i amfibolitt, og ligger ca. 65 m sørvest for hovedstollen. Amfibolitten er dels sterkt knadd og har dels mer gabbroisk, subofittisk tekstur. Den fører aggregater og disseminasjon av magnetkis og kobberkis (prøve .05). I tippen i skråninga nedenfor innslaget finnes både middelskornet massiv magnetkis (.06) og gabbro med disseminasjon og årer med finkornet magnetkis og kobberkis (.07).

Fieldsamples

Sample No. Sample type Miscellanrous

RO0058.05 Bedrock

Sampler: J.S. Sandstad/...Stored: Løkken

Comment: Kraftig disseminasjon og aggregater av magnetkis og kobberkis i finkornet grønn gabbro, Øvre stoll

No. of registrated element analyses = 1

RO0058.06 Dump

Sampler: J.S. Sandstad/...Stored: Løkken

Comment: Massiv, middelskornet magnetkis med enkelte kobberkis strenger, tipp Innslaget

No. of registrated element analyses = 1

RO0058.07 Dump

Sampler: J.S. Sandstad/...Stored: Løkken

Comment: Magnetkis disseminasjon/aggregater og kobberkis årer/stikk i frisk middelskornet gabbro, tipp Innslaget

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 1122 - 002 Oltesvik

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#

RO0058.01 Bedrock 2307 38 12 669 3703 .5 152.0

RO0058.02 Bedrock 2118 179 11 251 1172 1.2 27.0

RO0058.03 Bedrock 1953 30 15 680 3331 .3 80.0

RO0058.04 Dump 782 43 19 417 554 1.7 399.0

RO0058.05 Bedrock 4411 98 3 423 1968 1.5 155.0

RO0058.06 Dump 1916 51 10 690 3536 .4 371.0

RO0058.07 Dump 2034 166 3 265 1231 .9 187.0

RO0058.08 Bedrock 401 130 -3 61 152 -.3 4.0

RO0058.09 Bedrock 334 157 -3 61 205 -.3 7.0

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

RO0058.01 1.0 31.0 19 1.0 6 15.00 2 5 24.12

RO0058.02 21.0 1.0 10 1.3 50 29.00 2 8 5.38

RO0058.03 5.0 24.0 22 1.1 14 25.00 2 9 23.64

RO0058.04 11.0 23.0 9 .5 11 15.00 2 5 12.18

RO0058.05 1.0 22.0 12 .9 14 19.00 2 7 10.21

RO0058.06 7.0 45.0 18 .8 12 24.00 2 3 21.57

RO0058.07 1.0 17.0 8 .8 17 12.00 2 6 7.34

RO0058.08 -2.0 -2.0 -2 -.2 116 1.00 -3 -3 .71

RO0058.09 2.0 -2.0 -2 .2 358 2.00 -3 -3 1.06

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

Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* La*

RO0058.01 64 482 138 30.57 5.00 33.00 1 5.0 29.00

RO0058.02 96 737 632 14.51 9.00 4.00 1 34.0 100.00

RO0058.03 47 347 243 32.51 5.00 40.00 1 7.0 33.00

RO0058.04 103 530 177 16.36 2.00 22.00 4 8.0 24.00

RO0058.05 102 585 546 22.16 3.00 31.00 3 8.0 22.00

RO0058.06 58 443 225 29.34 3.00 35.00 1 9.0 31.00

RO0058.07 156 385 688 16.01 2.00 24.00 4 7.0 23.00

RO0058.08 51 148 857 7.25 6.00 -8.00 3 40.0 19.00

RO0058.09 92 140 816 7.79 9.00 -8.00 2 46.0 83.00

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Sample No. B*

RO0058.01 2

RO0058.02 3

RO0058.03 2

RO0058.04 3

RO0058.05 2

RO0058.06 2

RO0058.07 3

RO0058.08 4

RO0058.09 6

Oxide analyses
( All values are in % )

Sample No. Sample Type SiO2 Al2O3 TiO2 Fe2O3 MnO MgO CaO

RO0058.09 Bedrock 40.03 10.09 1.80 18.03 0.22 5.83 4.16

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

Sample No. Na2O K2O P2O5 Sum

RO0058.09 1.88 1.24 1.09 84.00

	From - To	Activity	Comments
	2000 - 2000	Sampling	Company/Institution :NGU

Era:	Proterozoic	Period:	Mesoproterozoic
Genesis:	Orthomagmatic formation	Form:	Irregular
Main texture:	Structureless	Min. distribution:	Semi-massive (20-50 % ore minerals)

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

Relationship	Mineral	Amount
Gangue mineral	Amphibole	Major mineral (>10%)
Gangue mineral	Feldspar	Major mineral (>10%)
Ore mineral	Pyrrhotite	Major mineral (>10%)
Ore mineral	Chalcopyrite	Subordinate mineral (1-10%)
Ore mineral	Pentlandite	Accessory mineral (<1%)

Relationship	Rock	Origin
Host rock	Banded gneis	Intrusive
		Metamorphic facies :Granulite
Host rock	Amphibolite	Intrusive Original rock :Gabbro
		Metamorphic facies :Granulite
Wall rock	Granitic gneiss	Intrusive Original rock :Granite
		Metamorphic facies :Granulite

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Foliation	Strike/Dip :225 / 25	Post-mineralisation ;...Effect :Modifies

	Abstract:
	Mineraliseringen opptrer i gabbro og presset gabro-skifer som uregelmessige masser, klumper og nyrer av nikkelholdig magnetkis og noe kobberkis. Forekomstene er for fattig til å ha økonomisk verdi.

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
RO0058.01	Bedrock	2307	38	12	669	3703	.5	152.0
RO0058.02	Bedrock	2118	179	11	251	1172	1.2	27.0
RO0058.03	Bedrock	1953	30	15	680	3331	.3	80.0
RO0058.04	Dump	782	43	19	417	554	1.7	399.0
RO0058.05	Bedrock	4411	98	3	423	1968	1.5	155.0
RO0058.06	Dump	1916	51	10	690	3536	.4	371.0
RO0058.07	Dump	2034	166	3	265	1231	.9	187.0
RO0058.08	Bedrock	401	130	-3	61	152	-.3	4.0
RO0058.09	Bedrock	334	157	-3	61	205	-.3	7.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
RO0058.01	1.0	31.0	19	1.0	6	15.00	2	5	24.12
RO0058.02	21.0	1.0	10	1.3	50	29.00	2	8	5.38
RO0058.03	5.0	24.0	22	1.1	14	25.00	2	9	23.64
RO0058.04	11.0	23.0	9	.5	11	15.00	2	5	12.18
RO0058.05	1.0	22.0	12	.9	14	19.00	2	7	10.21
RO0058.06	7.0	45.0	18	.8	12	24.00	2	3	21.57
RO0058.07	1.0	17.0	8	.8	17	12.00	2	6	7.34
RO0058.08	-2.0	-2.0	-2	-.2	116	1.00	-3	-3	.71
RO0058.09	2.0	-2.0	-2	.2	358	2.00	-3	-3	1.06

Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
RO0058.01	64	482	138	30.57	5.00	33.00	1	5.0	29.00
RO0058.02	96	737	632	14.51	9.00	4.00	1	34.0	100.00
RO0058.03	47	347	243	32.51	5.00	40.00	1	7.0	33.00
RO0058.04	103	530	177	16.36	2.00	22.00	4	8.0	24.00
RO0058.05	102	585	546	22.16	3.00	31.00	3	8.0	22.00
RO0058.06	58	443	225	29.34	3.00	35.00	1	9.0	31.00
RO0058.07	156	385	688	16.01	2.00	24.00	4	7.0	23.00
RO0058.08	51	148	857	7.25	6.00	-8.00	3	40.0	19.00
RO0058.09	92	140	816	7.79	9.00	-8.00	2	46.0	83.00

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
RO0058.09	Bedrock	40.03	10.09	1.80	18.03	0.22	5.83	4.16