Fact Sheet for <b>Deposit 4214

					Norsk versjon
	THE ORE DATABASE
	Deposit 4214 - 013 Skyttemyr
	(Object Id: 5332) (Last updated: 15.03.2024)

Location

County:

Agder

Municipality:

Froland (4214)

Map 1:50000:

Nelaug (1612-3)

Map 1:250000:

Arendal

Coordinate system:

EU89-UTM Zone 32

East:

482170 m.

North:

6490609 m.

Longitude:

8.6935940

Latitude:

58.5555980

Show on map

Resource

	Resource Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Resource Subtype:	Sulphides
			Element(s):	Cu Zn Au Kis Co

Importance

Raw material meaning:

Not Assessed (reg. 20.03.2017)

Resources and production

	Activity:	Mining	Reserves:
	Operating method:	Underground mining	Historical production:	10 thousand tons

Products

Element/product Crude ore grade or quality Reg. date

Au 2.4 ppm 15.03.2024

Co 0.03 % 15.03.2024

Cu 4 % 15.03.2024

Zn 6 % 15.03.2024

Operations

From - To Activity Comments

1866 - 1885 Regular production Company/Institution :Bøilestad Kobberverk.

Produksjonstall foreligger for denne perioden, mens andre kilder angir at det var drift i 70 år.

1983 - 1983 Geology Company/Institution :ARCO Norway, Inc.

2000 - 2000 Sampling Company/Institution :NGU

Mineralization

Era: Proterozoic Period: Mesoproterozoic

Genesis: Volcex Form: Lens

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

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

Strike/Dip: 20 / 70 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Proterozoic Period: Mesoproterozoic

Province: South Norwegian Basement Province

Geotec.unit: Bamble Complex

Tectonic complex:

Igneous complex:

Group: Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Chlorite Major mineral (>10%)

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Feldspar Major mineral (>10%)

Gangue mineral Calcite Subordinate mineral (1-10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Sphalerite Major mineral (>10%)

Ore mineral Chalcopyrite Major mineral (>10%)

Ore mineral Pyrite Subordinate mineral (1-10%)

Ore mineral Tennantite Accessory mineral (<1%)

Ore mineral Galena Accessory mineral (<1%)

Lithology:

Relationship Rock Origin

Wall rock Amphibolitic gneis Extrusive
Original rock :Basalt

Metamorphic facies :Amphibolite

Wall rock Biotite gneis

Metamorphic facies :Amphibolite

Structures

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

Wall rock Foliation Strike/Dip :23 / 60 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

The Skyttemyr deposit is hosted by amphibolite belonging to the Bamble Complex. The main period of mining was 1866-1885, but some sources indicate mining for c. 70 years. The production for the main period was in the order 10 000 t. The ore zone was followed to a depth of 200 m and 300 m along strike. The thickness of the outcropping ore zone is 50-60 cm and consist of a network of pyrrhotite-chalcopyrite in felsic groundmass. Dump samples show that the main mineralization is partly semimassive with mainly pyrrhotite, chalcopyrite and sphalerite and minor galena and fahlore. Gangue consists of quartz, chlorite, feldspar and calcite. The dump samples shows an significant enrichment of gold in the ore. Average of 8 dump samples yield 3.45 % Cu, 3.60 % Zn, < 0.01 % Pb, 33 g/t Ag, 2.4 g/t Au. The Bøylestad deposit c. 2.5 km to the NW is quite similar, and was mined at the same time. More than 6000 t ore was produced from this deposit, which consists of a 1-3 m more massive ore.

Photo(s) from the Deposit area:

Photo no. 1 showing Hovedsynken i Skyttemyr"

Bibliography:

From NGU's Reference Archive:

Froland copper property, Norway.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 4156;5 pages

Abstract:

Forekomsten omfatter Skytmyr, Boilestad og Sletne gruver sammen med flere skjerp. Malmsonen er omgitt av gneiser og kan følges opptil 3,2 km. Mineraliseringen er svovel og magnetkis med noe kobber. Det blir gitt en beskrivelse av gruvene og skjerpene mellom dem, hvor det tilslutt er behandlet gruvenes økonomi.

, 1885 (?)

Bøilestad, Skytmyr.

;Norges geologiske undersøkelse;TEKNISK RAPPORT;Bergarkivet; No.BA 3681;5 pages

Abstract:

Oversikt / tall for drift 1866-1885. Rapporten som er håndskrevet, gir gruvetekniske opplysninger.

Kvien, R. , 1961

Fahlbåndsonen Froland - Bøylestad.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 3809;9 pages

Abstract:

Fahlsbåndsonene har et meget regelmessig forløp og synes ikke å ha tilkytning til noen bestemt bergartstype. Sonene kjennetegnes med rustutfelling, et sort belegg og alltid lukt av svovel. Enkelte steder forekommer flere parallelle soner. Synlige kiskorn er ikke alltid til stede, men ved Skytmyr har fahlbåndsonen dannet grunnlag for gruvedrift.

Bech, Lone , 1984

Detailed geological mapping of the Skyttemyr-Bøylestad ore and ist host-rock package, Bamble section, 1983.

;ARCO Norway;RAPPORT;Report; No.84-230-20;22 s. + v pages

Abstract:

The formerly mined Skyttemyr-Bøylestad ore is situated in the Froland district of the Bamble belt, Norway. The ore is a 2.5 km long horizon with Au-bearing, massive pyrrhotite-chalcopyrite-bodies, centrally located in the at least 15 km long north-east-striking Skyttemyr sulfide zone. This zone marks the border between a thick "normal" volcanic-sedimentary package to the east. Alternating biotite-quartz gneiss, garnet amphibolite, sillimmanite gneiss, quartzites, calc-silicates, carbonates, albitites and sulfide-bearing or rusty units constitute the last mentioned. The Skyttemyr sone is the most Au and sulfide-rich zone in the Al-rich package. East of this only traces of sulfide are found. Highest Au-values (max. = 2.94 ppm) are clearly confined to the central-most Cu-rich massive ore at Skyttemyr, and the Au-content decreases to trace values 1 km north and south of this location. Zn seems partly to show a reverse behaviour. [...]

Fieldsamples

Sample No. Sample type Miscellanrous

AA0160.01 Dump

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

Comment: Semi-massiv kobberkis-sinkblende-magnetkis malm, kvartsøyne og kvarts-klorittrik grunnmasse, hovedtipp.

No. of registrated element analyses = 1

AA0160.02 Dump

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

Comment: Kobberkis-sinkblende årer/strenger i grovkornet kvarts+sillimanitt, hovedtipp

No. of registrated element analyses = 1

AA0160.03 Dump

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

Comment: Båndet kobberkis-sinkblende malm i kvartsrik grunnmasse, hovedtipp.

No. of registrated element analyses = 1

AA0160.04 Dump

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

Comment: Massiv magnetkismalm med litt sinkblende, kobberkis, bergartsfragmenter og kvartsøyne, hovedtipp

No. of registrated element analyses = 1

AA0160.05 Dump

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

Comment: Kobberkis-sinkblende aggregater/årer i svært finkornet kvartsrik grunnmasse, hovedtipp

No. of registrated element analyses = 1

AA0160.08 Dump

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

Comment: Semi-massiv magnetkis-kobberkis+sinkblende malm, med mange runde bergartsfragmenter (nordligste tipp),

No. of registrated element analyses = 1

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

Name of Locality: Skyttemyr sør

(Object Id: 10712 13,01,00)

Location

County: Agder Municipality: Froland (4214)

Map 1:50000: Nelaug (1612-3) Map 1:250000: Arendal

Coordinate system: EU89-UTM Zone 32

East: 482180 m. North: 6490569 m.

Longitude: 8.6937690 Latitude: 58.5552390

Show on map

Resource

Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper

Element(s): Cu Zn Au Kis

Resources and production

Activity: Mining Reserves:

Operating method: Underground mining Historical production:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Feldspar Major mineral (>10%)

Gangue mineral Chlorite Subordinate mineral (1-10%)

Ore mineral Chalcopyrite Major mineral (>10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Sphalerite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Wall rock Biotite gneis

Metamorphic facies :Amphibolite

Wall rock Amphibolitic gneis Extrusive
Original rock :Basalt

Metamorphic facies :Amphibolite

Structures

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

Wall rock Foliation Strike/Dip :12 / 80 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Dette er en 8 m lang og 3-4 m bred vannfylt gruveåpning som ligger 20 m SSV for den sørligs sjaktåpningen. En 0,5-1 m bred malmsona med orientering 2º/70º er blotta i nordveggen. Aggregater og årenettverk av kobberkis opptrer i grå, kvartsrik bergart (prøve .06) som også er gjennomtrengt av flere, svakt sulfidførende kvartsganger. Den overlagres i øst av biotittførende hornblendegneis med foliasjon 12º/80º.

Fieldsamples

Sample No. Sample type Miscellanrous

AA0160.06 Bedrock

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

Comment: Årenettverk av kobberkis i finkornet kvartsrik grunnmasse, fast fjell sørligst i hovedgruva.

No. of registrated element analyses = 1

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

Name of Locality: Dagskjæring

(Object Id: 10713 13,02,00)

Location

County: Agder Municipality: Froland (4214)

Map 1:50000: Nelaug (1612-3) Map 1:250000: Arendal

Coordinate system: EU89-UTM Zone 32

East: 482260 m. North: 6490629 m.

Longitude: 8.6951390 Latitude: 58.5557810

Show on map

Resource

Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper

Element(s): Cu Zn Au Kis

Resources and production

Activity: Test mining Reserves:

Operating method: Open pit mining Historical production:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Feldspar Major mineral (>10%)

Gangue mineral Biotite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Wall rock Quartzitic biotite gneis

Metamorphic facies :Amphibolite

Structures

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

Wall rock Foliation Strike/Dip :16 / 50

Information(s) in free text format

Free text

Et 8 m langt, 2 m bredt og opptil 4-5 m høyt dagbrudd er anlagt øst for sjaktåpningene med retning 338º fra vannet. Dette går bare i sidestein (i heng av malmsona) som består av finkornet, kvartsittisk gneis. Den gjennomskjæres av 10 cm brede rette kvartsganger og sene kvarts-kalkspat-hornblende årer. Ingen sulfidmineralisering er registrert.

Name of Locality: Skyttemyr, sørligste skjæring

(Object Id: 10714 13,03,00)

Location

County: Agder Municipality: Froland (4214)

Map 1:50000: Nelaug (1612-3) Map 1:250000: Arendal

Coordinate system: EU89-UTM Zone 32

East: 482169 m. North: 6490530 m.

Longitude: 8.6936000 Latitude: 58.5548800

Show on map

Resource

Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper

Element(s): Cu Zn Au Kis

Resources and production

Activity: Pitting Reserves:

Operating method: Historical production:

Mineralogy

Relationship Mineral Amount

Gangue mineral Feldspar Major mineral (>10%)

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Biotite Subordinate mineral (1-10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Ore mineral Sphalerite Accessory mineral (<1%)

Ore mineral Arsenopyrite Accessory mineral (<1%)

Lithology:

Relationship Rock Origin

Host rock Biotite gneis

Metamorphic facies :Amphibolite

Wall rock Amphibolite Extrusive
Original rock :Basalt

Metamorphic facies :Amphibolite

Structures

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

Wall rock Foliation Strike/Dip :6 / 75 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

En 12 m lang, 2-3 m bred og 2-3 m høy dagskjæring med retning 5° går opp langs en rygg fra vannkanten, lengst sør i gruveområdet. Den er dels gjenrast. En 20-30 cm bred sone (10°/80°) med sulfidmineralisering som består av svak disseminasjon og korte strenger med kobberkis og magnetkis opptrer i finkornet biotittgneis (prøve .07). Analyser viser at denne sona også er noe anriket på gull (1,0 g/t ). Biotittgneis finnes også i ligg og er dels båndet og granatførende, mens amfibolrik gneis/amfibolitt opptrer i hengen.15 m lengre nord ligger et mindre, vannfylt og gjengrodd skjerp.

Fieldsamples

Sample No. Sample type Miscellanrous

AA0160.07 Bedrock

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

Comment: Svak disseminasjon av kobberkis og pyritt i finkornet biotittgneis, fast fjell i sørligste dagskjæring.

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 4214 - 013 Skyttemyr

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#

AA0160.01 Dump 99999 14589 52 349 166 78.3 4013.0

AA0160.02 Dump 21638 99999 28 125 26 22.8 4044.0

AA0160.03 Dump 27138 99999 106 167 32 22.7 7182.0

AA0160.04 Dump 10870 20951 35 530 574 5.9 1171.0

AA0160.05 Dump 13828 41626 156 57 23 14.0 818.0

AA0160.06 Bedrock 84413 2335 108 104 30 103.2 820.0

AA0160.07 Bedrock 7789 1333 142 100 58 15.0 1109.0

AA0160.08 Dump 10423 7168 41 270 351 4.0 302.0

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

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

AA0160.01 1.0 2.0 416 63.6 12 3.00 2 101 12.60

AA0160.02 1.0 1.0 3 437.8 4 8.00 3 43 9.80

AA0160.03 1.0 4.0 66 530.3 10 5.00 2 100 9.63

AA0160.04 1.0 8.0 477 81.9 53 7.00 2 32 19.90

AA0160.05 1.0 1.0 27 225.7 10 3.00 5 44 5.11

AA0160.06 1.0 5.0 222 17.7 20 3.00 7 89 9.65

AA0160.07 2.0 3.0 900 7.3 171 4.00 8 74 2.18

AA0160.08 3.0 3.0 83 29.6 54 5.00 2 23 12.20

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

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

AA0160.01 66 157 332 23.27 2.00 4.00 1 3.0 6.00

AA0160.02 1 26 187 6.56 1.00 4.00 7 3.0 1.00

AA0160.03 13 37 368 8.49 9.00 4.00 1 15.0 25.00

AA0160.04 38 101 383 32.14 1.00 4.00 1 11.0 3.00

AA0160.05 92 126 527 7.10 3.00 8.00 1 7.0 9.00

AA0160.06 17 56 195 11.66 1.00 4.00 7 4.0 4.00

AA0160.07 200 437 348 6.51 1.00 4.00 1 11.0 4.00

AA0160.08 177 222 294 24.25 1.00 4.00 1 8.0 4.00

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

Sample No. B*

AA0160.01 2

AA0160.02 6

AA0160.03 7

AA0160.04 2

AA0160.05 3

AA0160.06 5

AA0160.07 3

AA0160.08 2

Element/product	Crude ore grade or quality	Reg. date
Au	2.4 ppm	15.03.2024
Co	0.03 %	15.03.2024
Cu	4 %	15.03.2024
Zn	6 %	15.03.2024

From - To	Activity	Comments
1866 - 1885	Regular production	Company/Institution :Bøilestad Kobberverk.
		Produksjonstall foreligger for denne perioden, mens andre kilder angir at det var drift i 70 år.
1983 - 1983	Geology	Company/Institution :ARCO Norway, Inc.
2000 - 2000	Sampling	Company/Institution :NGU

Era:	Proterozoic	Period:	Mesoproterozoic
Genesis:	Volcex	Form:	Lens
Main texture:	Banded	Min. distribution:	Semi-massive (20-50 % ore minerals)

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

Relationship	Mineral	Amount
Gangue mineral	Chlorite	Major mineral (>10%)
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Feldspar	Major mineral (>10%)
Gangue mineral	Calcite	Subordinate mineral (1-10%)
Ore mineral	Pyrrhotite	Major mineral (>10%)
Ore mineral	Sphalerite	Major mineral (>10%)
Ore mineral	Chalcopyrite	Major mineral (>10%)
Ore mineral	Pyrite	Subordinate mineral (1-10%)
Ore mineral	Tennantite	Accessory mineral (<1%)
Ore mineral	Galena	Accessory mineral (<1%)

Relationship	Rock	Origin
Wall rock	Amphibolitic gneis	Extrusive Original rock :Basalt
		Metamorphic facies :Amphibolite
Wall rock	Biotite gneis
		Metamorphic facies :Amphibolite

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Foliation	Strike/Dip :23 / 60	Post-mineralisation ;...Effect :Modifies

	Abstract:
	Forekomsten omfatter Skytmyr, Boilestad og Sletne gruver sammen med flere skjerp. Malmsonen er omgitt av gneiser og kan følges opptil 3,2 km. Mineraliseringen er svovel og magnetkis med noe kobber. Det blir gitt en beskrivelse av gruvene og skjerpene mellom dem, hvor det tilslutt er behandlet gruvenes økonomi.

	Abstract:
	Oversikt / tall for drift 1866-1885. Rapporten som er håndskrevet, gir gruvetekniske opplysninger.

	Abstract:
	Fahlsbåndsonene har et meget regelmessig forløp og synes ikke å ha tilkytning til noen bestemt bergartstype. Sonene kjennetegnes med rustutfelling, et sort belegg og alltid lukt av svovel. Enkelte steder forekommer flere parallelle soner. Synlige kiskorn er ikke alltid til stede, men ved Skytmyr har fahlbåndsonen dannet grunnlag for gruvedrift.

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

	Activity:	Pitting	Reserves:
	Operating method:		Historical production:

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
AA0160.01	Dump	99999	14589	52	349	166	78.3	4013.0
AA0160.02	Dump	21638	99999	28	125	26	22.8	4044.0
AA0160.03	Dump	27138	99999	106	167	32	22.7	7182.0
AA0160.04	Dump	10870	20951	35	530	574	5.9	1171.0
AA0160.05	Dump	13828	41626	156	57	23	14.0	818.0
AA0160.06	Bedrock	84413	2335	108	104	30	103.2	820.0
AA0160.07	Bedrock	7789	1333	142	100	58	15.0	1109.0
AA0160.08	Dump	10423	7168	41	270	351	4.0	302.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
AA0160.01	1.0	2.0	416	63.6	12	3.00	2	101	12.60
AA0160.02	1.0	1.0	3	437.8	4	8.00	3	43	9.80
AA0160.03	1.0	4.0	66	530.3	10	5.00	2	100	9.63
AA0160.04	1.0	8.0	477	81.9	53	7.00	2	32	19.90
AA0160.05	1.0	1.0	27	225.7	10	3.00	5	44	5.11
AA0160.06	1.0	5.0	222	17.7	20	3.00	7	89	9.65
AA0160.07	2.0	3.0	900	7.3	171	4.00	8	74	2.18
AA0160.08	3.0	3.0	83	29.6	54	5.00	2	23	12.20

Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
AA0160.01	66	157	332	23.27	2.00	4.00	1	3.0	6.00
AA0160.02	1	26	187	6.56	1.00	4.00	7	3.0	1.00
AA0160.03	13	37	368	8.49	9.00	4.00	1	15.0	25.00
AA0160.04	38	101	383	32.14	1.00	4.00	1	11.0	3.00
AA0160.05	92	126	527	7.10	3.00	8.00	1	7.0	9.00
AA0160.06	17	56	195	11.66	1.00	4.00	7	4.0	4.00
AA0160.07	200	437	348	6.51	1.00	4.00	1	11.0	4.00
AA0160.08	177	222	294	24.25	1.00	4.00	1	8.0	4.00