Fact Sheet for Deposit Area 441

					Norsk versjon
	THE ORE DATABASE
	Deposit Area 441 - 005
	(Last updated 27.okt.2023)

Name of Deposit Area : Fredrik IV

(Object Id : 0441,005,00,00)

Location

County :

Hedmark (04)

Municipality :

Os (Hedmark) (0441)

Map 1:50000:

Dalsbygda (1620-2)

Map 1:250000:

Røros

Marking point:

Longitude:

11.0298560

Latitude:

62.5226650

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

604480 m.

Y-coord:

6934049 m.

Commodity

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

Production

Activity:	Mining	Reserves:
Prod. method:	Underground mining	Production:	2,6 thousand tons
Prod. status:	Disused, closed	Volume of dump:

Importance

Public: Little Importance (reg. 18.02.2015)

Economical: Minor interest

Operations

From - To Activity Comments

1707 - 1727 Regular production Company/Institution :Røros Kobberverk

1870 - 1875 Regular production Company/Institution :Fredrik Sjøstedt

1890 - 1891 Regular production Company/Institution :Os-Hommelvik Kobberverk

1905 - 1908 Regular production Company/Institution :Røros Kobberverk

1966 - 1966 Geophysics Company/Institution :NGU

1998 - 1998 Sampling Company/Institution :NGU

Mineralization

Era: Paleozoic Period: Ordovician

Dating: Method:

Genesis: Hydrothermal vein Form: Irregular

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

Main grain size: Very unevenly grained Main alteration: Chloritisation

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period: Ordovician

Province: Caledonides

Geotec.unit: Trondheim Nappe Complex

Tectonic complex:

Igneous complex:

Group: Fundsjø Group Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Calcite Major mineral (>10%)

Gangue mineral Actinolite Major mineral (>10%)

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Garnet Subordinate mineral (1-10%)

Gangue mineral Chlorite Subordinate mineral (1-10%)

Gangue mineral Biotite Accessory mineral (<1%)

Ore mineral Chalcopyrite Major mineral (>10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Magnetite Subordinate mineral (1-10%)

Ore mineral Pyrite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Host rock Metagabbro Intrusive
Original rock :Gabbro

Metamorphic facies :Greenschist

Host rock Chlorite amphibole schist Extrusive
Original rock :Basalt

Metamorphic facies :Greenschist

Structures

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

Host rock Foliation Strike/Dip :202 / 80 Post-mineralisation ;...Effect :Controls

Host rock Foliation Strike/Dip :214 / 63 Post-mineralisation ;...Effect :Controls

Host rock Fold axis Dir./Plunge :207 / 56 Post-mineralisation ;...Effect :Controls

Information(s) in free text format

Free text

The mine is situated at the top of the hill Gruvåsen about 4 km west of Dalsbygda at an elevation of about 860 m.a.s.l., and is easily accessible by a marked footpath to the top of the hill. History: The deposit was discovered by two prospectors from Røros Kobberverk in 1707. Røros Kobberverk worked the deposit from 1712 to 1727. The ore was mainly transported to the smelter at Tolga. The mine was then abandoned until about 1870, when Fredrik Sjøstedt was the operator. The Tolga smelter was closed down in 1871 and the ore was therefore transported to Røros. From 1890 to 1891 the company Os-Hommelvik Kobberverk was the operator and 2000 t ore was produced with a grade of about 6 % Cu. The mine was again operated by Røros Kobberverk in the period 1905 to 1908, but produced only 575 t ore in these four years. In 1916 the mining equipment was sold and the mine was finally abandoned. The mine was actually only worked for 30 years during the 200 years it existed. Geology: The mine consists of numerous vertical shafts of which the Kongen and Dronningen shafts are the deepest. The Kongen shaft is 123 m deep. The shafts are guarded by fences and are not filled in, but because of weathering and steepness of the shaft walls it is difficult to get good impressions of the directions, thicknesses and nature of the ore zones. The reason for the mine workings being shafts is that the ore occurred in stocks with steep plunges toward the south, probably following the regional foldaxis/lineation (about 210o/60o) and was enriched in the fold hinges of this open fold phase. The foliation in the surrounding metagabbro is steeply dipping (64-80o) and strikes toward SSW (202-214o). The dumps are mainly covered by vegetation and their sizes are difficult to estimate. It is also difficult to find representative samples of ore at the dumps, not only because of the overburden, but also because the richest ore has obviously been taken away. The ore found at the dumps consists of rich impregnation, partly as irregular veins, of chalcopyrite, pyrrhotite and locally sparse pyrite cubes in a matrix dominated by calcite with abundant needles of actinolite and some quartz. Some pieces of semi-massive to massive chalcopyrite with lesser amounts of pyrrhotite were also found, probably being more representative of the ore which was produced. The matrix in these pieces were also mainly calcite, actinolite and quartz. The ore assemblages were in contact with, and surrounded by chlorite schist, representing the main alteration of the host rock.

Photo(s) from the Deposit area:

Photo no. 1 showing Stuff fra dronninga"

Photo no. 2 showing Plakat ved Fredrik IV"

Bibliography:

From NGU's Reference Archive:

Egeberg, F. , 1941

Gruver og skjerp ved Os i Østerdalen.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 295;17 pages

Abstract:

Rapporten handler hovedsaklig om Fossgruven, men Fredrik IV, Oscar II og Vingelen gruve omtales også. Fossgruvens geologi, selve gruven og anlegget er beskrevet. Rapporten inneholder planer for drift av Fossgruven, anleggskalkyle, driftskalkyle m.m. Konklusjon: Fossgruven er en liten forekomst med lang transportvei. Det eksisterende veinett tillater ikke tungtransport. Transport og kraftspørsmålet må løses ved å finne muligheter for felles drift av flere gruver. Distriktet har flere gruver og skjerp med gode muligheter. Distriktet må derfor undersøkes malmgeologisk. Resultatet herav kan føre til forslag om geofysiske målinger og derav følgende diamantboringer. Utgifter til rene orienterende arbeider i denne retning er anslagsvis antatt å måtte bli kr. 100 000,-. Forekomstnr.: 10982, 10985, 11017, 11018.

Færden, Johannes , 1950

Foreløpig rapport fra Os gruvefelt, Oscar II gruve, Fredrik IV gruve og Foss gruve.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 1290;4 pages

Abstract:

Oscar II gruve. Det er tidligere drevet ut ca. 9 500 tonn kis med 41% S og 3,5% Cu i gjennomsnitt. Malmen har mektighet under 1,5 m. og skal være oppfart i 150 m. lengde, hvorav 90 m. er drivverdig. Det har uten resultat vært boret etter paralellmalmer i gruvens vestre del. Forekomsten ligger i glimmerskifer fra Rørosgruppen. Strøket er N 40 grader Ø, fallet er 40 grader mot NV. Foldningsaksen er målt Ø 65 grader S, fall 55 grader mot NV. Det er sannsynlig at malmen har en dragning i felt i nordlig retning. Fredrik IV gruve. Forekomsten ligger i amfibolittisk grønnskifer. Strøket er N 20 - 25 grader Ø, fallet 80 grader mot V. Det er sannsynlig at malmen er av stokkformig type. Malmen skal ha vert ganske kobberrik. Fossgruven. Det er tidligere drevet ut ca. 17 000 tonn eksportmalm med 46% S og 1,3% Cu i gjennomsnitt. Malmen er linjalformet og ligger steilt. Gjennomsnittsmektigheten er ca. 1,75 m., maksimal mektighet er 5 m. og feltutstrekningen er 40 - 60 m. Diamantboring i gruven har påvist malm i 170 m. nivå med mektighet 1,8 m., og en rekke magnetkisbånd. Forekomstnr.: 11017 og 11018. Forekomstenes navn og koordinater: Fredrik IV 32 6045 69343, Foss 6009 69387 og Oscar 6095 69316.

Sakshaug, G.F. , 1967

Elektromagnetisk undersøkelse Vanngrøfta - Fredrik IV - Langen Syd for Daleng Gård - Vangrøftdalen.

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.715 A;8 pages

Abstract:

Utgangspunktet for undersøkelsene var Fredrik IV Grube, og det ble målt et felt på 10,8 km2 - 8,4 km langt og 1,2 km bredt. Det ble foretatt el.magn. kond.målinger (Turam) på vanlig måte. Ved Daleng gård syd for Vanngrøfta ble det målt et mindre område (400m x 2 000 m) med slingram. Ved Turammålingene ble det påvist et stort antall ledende soner av vekslende utstrekning og ledningsevne. Over Fredrik IV Grube ble det ikke observert indikasjoner av betydning. Det er sett grafittskifer i feltet, og funnet løsblokker med kis. Det må foretas røsking, eventuelt diamantboringer for å finne ut hva de ledende soner inneholder. Ved slingrammålingene ble det påvist 3-4 ledende soner.

References not to be found in NGU's Reference Archive.:

Per J. Grue (1997): Fredrik IV's gruve på Gruvåsen i Dalsbygda. Nasjonalbiblioteket, 63 sider. url = http://urn.nb.no/URN:NBN:no-nb_digibok_2011090108051 | side = }}

Fieldsamples

Sample No. Sample type Miscellanrous

F4-3 Dump

Sampler :T. Bjerkgård/...Stored :Løkken

Comment :Semimassive chalcopyrite with subordinate pyrrhotite in quartz and chlorite

No. of registrated element analyses = 1

F4-4 Dump

Sampler :T. Bjerkgård/...Stored :Løkken

Comment :Collection of small pieces with chalcopyrite, pyrrhotite and quartz, chlorite, biotite and some actinolite

No. of registrated element analyses = 1

F4-5 Dump

Sampler :T. Bjerkgård/...Stored :Løkken

Comment :Semimassive chalcopyrite and pyrrhotite in quartz with some chlorite and biotite

No. of registrated element analyses = 1

F4-6 Dump

Sampler :T. Bjerkgård/...Stored :Løkken

Comment :Massive chalcopyrite with lesser pyrrhotite

No. of registrated element analyses = 1

HE0137.01 Dump

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

Comment :Rich chalcopyrite impregnation w/ some pyrrhotite and sparse pyrite cubes in irregular veins in quartz-calcite rock. Some mm needles of actinolite and also thin layers of chlorite.

No. of registrated element analyses = 1

HE0137.02 Dump

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

Comment :Rich chalcopyrite-pyrrhotite impregnation in calcite with lesser quartz. Frequent 1-3 mm blades and rosettes of light green actinolite in irregular lenses.

No. of registrated element analyses = 1

HE0137.03 Dump

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

Comment :Semimassive veins and lenses of chalcopyrite with some pyrrhotite in calcite with lesser quartz and sparse actinolite. Some parts contains very small garnets, and finegrained chlorite and biotite occurs throughout.

No. of registrated element analyses = 1

HE0137.04 Dump

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

Comment :Semimassive/massive chalcopyrite-pyrrhotite, irregularly distributed in lenses with patches of actinolite, carbonate, quartz and chlorite. Few 1-2 mm octahedra of magnetite.

No. of registrated element analyses = 1

HE0137.05 Dump

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

Comment :Carbonate-quartzband in chlorite-schist with rich irregular impregnation of chalcopyrite and lesser pyrrhotite.

No. of registrated element analyses = 1

HE0137.06 Dump

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

Comment :Actinolite-calcite rock with few <= 1 mm veinlets and patches of chalcopyrite. Irregular distribution of 1-5 cm aggregates of brown calcite and 1-1.5 cm needles of actinolite in rosettes.

No. of registrated element analyses = 1

HE0137.07 Dump

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

Comment :Semimassive to massive chalcopyrite with some pyrrhotite in a partly patchy matrix of calcite, actinolite and garnet.

No. of registrated element analyses = 1

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

Name of Locality : Stollen

(Object Id : 0441,005,01,00)

Location

County : Hedmark (04) Municipality : Os (0441)

Map 1:50000: Dalsbygda (1620-2) Map 1:250000: Røros

Marking point: Longitude: 11.0328320 Latitude: 62.5244180

EU89-UTM Zone 32 (Coordinates IS confirmed)

X-coord: 604626 m. Y-coord: 6934250 m.

Commodity

Main Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Sub Type: Sulphides

Element(s): Kis Co

Production

Activity: Mining Reserves:

Prod. method: Underground mining Production:

Prod. status: Disused, closed Volume of dump:

Information(s) in free text format

Description

Stollen befinner seg ca. 280 meter nordøst for Kongen og Dronninga, nede i den skogkledde lia. Den var opprinnelig tenkt å være til drenering og antakelig utføring av malm fra de andre åpningene i sørvest opp mot Kongen og Dronninga. Det er ukjent hvor langt inn stollen går, siden den er utilgjengelig allerede drøyt 10 meter inn der den blir vannfylt innenfor en sjakt. Det er to sjakter til, henholdsvis 25 og 50 meter mot sørvest som har forbindelse med stollen, så lengden er minst 50 meter. Det er et tverrslag 10 m innenfor stollåpningen som går 10 meter mot sørøst og leder inn til en dyp, vannfylt synk. Mineralisering er tilknyttet flere steiltstående, opptil 10-20 cm tykke kvartsårer i sterkt tektonisert metagabbro, omdannet til klorittskifer. Mineraliseringen består av relativt svak impregnasjon av kobberkis og noe magnetkis tilknyttet disse kvartsårene. Det er tre slike årer over en bredde av stollen og sjakta (7-8 m) og flere tynnere slirer/linser.

Photo(s) from the Deposit area:

Photo no. 1 showing Malmsone i stollen"

Photo no. 2 showing Malmsone i stollen"

Photo no. 3 showing Malmsone i stollen"

Photo no. 4 showing Malmsone i stollen"

Photo no. 5 showing Malmsone i stollen"

Name of Locality : Jobanken

(Object Id : 0441,005,02,00)

Location

County : Hedmark (04) Municipality : Os (0441)

Map 1:50000: Dalsbygda (1620-2) Map 1:250000: Røros

Marking point: Longitude: 11.0318620 Latitude: 62.5238660

EU89-UTM Zone 32 (Coordinates IS confirmed)

X-coord: 604579 m. Y-coord: 6934186 m.

Commodity

Main Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Sub Type: Sulphides

Element(s): Kis Co

Production

Activity: Mining Reserves:

Prod. method: Open pit and underground mining Production:

Prod. status: Disused, closed Volume of dump:

Information(s) in free text format

Description

Jobanken gruve har fått sitt navn etter en som het Jo som skal ha omkommet på stedet. Gruva består av to vannfylte synker 20 meter i avstand i NV-SØ retning. Den østligste er mer enn strosse/dagskjæring med dimensjoner 15x5 m og 4 m ned til vannspeilet. Den vestlige er nok temmelig grunn (omriss 5x3 m). Tipphaugen som inneholder ca. 700 kbm, befinner seg øst for åpningene og stammer nok for det aller meste fra dagskjæringen. Det er deformasjonssoner/skjærsoner i gabbroen, som er omdannet til klorittskifer, orientert NV-SØ (foliasjon 150/80). I sonene og i en del blokker på tipphaugen er det tynne, < 1cm til noen cm årer med kvarts i mørk grønn kloritt som fører dels rik impregnasjon av kobberkis og noe magnetkis.

Photo(s) from the Deposit area:

Photo no. 1 showing Jobanken-Dagskjæringen"

Photo no. 2 showing Mineraliserte blokker"

Fieldsamples

Sample No. Sample type Miscellanrous

F4-1 Dump

Sampler :T. Bjerkgård/...Stored :Løkken

Comment :Collection of pieces with rich chalcopyrite impregnation in quartz

No. of registrated element analyses = 1

F4-2 Dump

Sampler :T. Bjerkgård/...Stored :Løkken

Comment :Chalcopyrite and pyrrhotite in quartz with chlorite

No. of registrated element analyses = 1

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

Name of Locality : Jespers gruve

(Object Id : 0441,005,03,00)

Location

County : Hedmark (04) Municipality : Os (0441)

Map 1:50000: Dalsbygda (1620-2) Map 1:250000: Røros

Marking point: Longitude: 11.0309750 Latitude: 62.5239690

EU89-UTM Zone 32 (Coordinates IS confirmed)

X-coord: 604533 m. Y-coord: 6934197 m.

Commodity

Main Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Sub Type: Sulphides

Element(s): Kis Co

Production

Activity: Mining Reserves:

Prod. method: Open pit and underground mining Production:

Prod. status: Disused, closed Volume of dump: 300 m3

Information(s) in free text format

Description

Jespers gruve er en vannfylt synk, ca. 5x5 m i omriss. Tippen, som er totalt overgrodd, anslås til å inneholde 300 kbm. I veggene av synken som er utilgjengelig, sees sterkt deformert og klorittisert gabbro, dels noe rusten.

Name of Locality : Halfdan Fyhns gruve

(Object Id : 0441,005,04,00)

Location

County : Hedmark (04) Municipality : Os (0441)

Map 1:50000: Dalsbygda (1620-2) Map 1:250000: Røros

Marking point: Longitude: 11.0312630 Latitude: 62.5219260

EU89-UTM Zone 32 (Coordinates IS confirmed)

X-coord: 604554 m. Y-coord: 6933969 m.

Commodity

Main Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Sub Type: Sulphides

Element(s): Kis Co

Production

Activity: Mining Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

Information(s) in free text format

Description

Ikke befart, tippen er synlig på topografisk kart og kart i geofysikkrapport (NGU 715A).

Analyse Results

from

Deposit Area 441 - 005 Fredrik IV

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#

F4-1 Dump 64200 123 2 111 13 8.0 2880.0

F4-2 Dump 10650 55 2 573 127 2.7 869.0

F4-3 Dump 48000 237 5 1710 409 7.7 706.0

F4-4 Dump 59200 513 6 523 120 17.0 1530.0

F4-5 Dump 37600 128 7 1940 478 23.1 970.0

F4-6 Dump 141000 643 10 1290 128 23.0 5400.0

HE0137.01 Dump 49760 256 27 687 85 7.8 728.0

HE0137.02 Dump 18711 43 8 187 28 2.9 305.0

HE0137.03 Dump 46368 125 16 440 52 6.6 572.0

HE0137.04 Dump 99798 486 -3 1778 288 20.7 3817.0

HE0137.05 Dump 70540 338 6 1018 199 14.2 234.0

HE0137.06 Dump 655 20 6 13 12 .4 21.0

HE0137.07 Dump 99999 983 24 1588 188 30.2 4680.0

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

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

F4-1 2.5 2.0 48 1.6 5 4.46 0 0 0

F4-2 6.0 13.0 9 .3 5 2.60 0 0 0

F4-3 7.0 3.0 13 5.4 10 12.25 0 0 0

F4-4 2.5 2.0 5 9.5 20 14.10 0 0 0

F4-5 2.5 9.0 13 2.2 10 6.88 0 0 1

F4-6 2.5 3.0 128 12.1 5 13.50 0 0 1

HE0137.01 1.0 1.0 208 4.4 16 13.00 -3 -3

HE0137.02 -1.0 2.0 2 .8 22 3.00 -3 6

HE0137.03 -1.0 -1.0 5 1.5 21 5.00 -3 11

HE0137.04 2.0 7.0 139 8.0 13 21.00 18 9

HE0137.05 1.0 5.0 -2 4.4 19 6.00 -3 14

HE0137.06 3.0 7.0 2 .4 9 2.00 -3 -3

HE0137.07 2.0 4.0 253 16.3 16 24.00 55 124

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

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

F4-1 117.00 2.48 0.40 1.29 5.36 27 34 178 10.35

F4-2 94.00 8.65 0.33 0.36 5.43 121 242 603 15.20

F4-3 327.00 7.61 1.06 2.03 10.00 52 219 555 28.20

F4-4 99.00 3.99 0.33 1.05 7.33 53 102 909 15.10

F4-5 202.00 1.15 0.67 1.11 10.00 7 11 325 30.00

F4-6 304.00 2.86 0.97 2.28 10.00 10 39 311 25.50

HE0137.01 38 222 445 11.96

HE0137.02 10 67 700 4.15

HE0137.03 15 55 776 8.53

HE0137.04 13 47 456 26.89

HE0137.05 51 48 363 18.35

HE0137.06 12 28 1802 2.22

HE0137.07 8 24 432 26.57

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

Sample No. Th* U* W* Rb* Sr* Y* Zr* Nb* Ta*

F4-1 0.04 0.05 0 0.2 10.1 1.1 0 0.10 0.03

F4-2 0.10 0.10 0 0.2 19.3 2.5 2 0.10 0.03

F4-3 0.04 0.10 0 2.1 41.1 1.9 1 0.10 0.03

F4-4 0.02 0.10 0 9.5 32.9 5.7 3 0.10 0.03

F4-5 0.02 0.05 0 0.8 8.6 2.4 1 0.05 0.03

F4-6 0.01 0.05 0 0.4 15.2 0.5 1 0.05 0.03

HE0137.01 -2.00 -8.00 -2 19.0

HE0137.02 -2.00 -8.00 -2 25.0

HE0137.03 -2.00 -8.00 -2 20.0

HE0137.04 2.00 -8.00 -2 16.0

HE0137.05 -2.00 -8.00 -2 12.0

HE0137.06 -2.00 -8.00 -2 87.0

HE0137.07 2.00 -8.00 -2 16.0

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

Sample No. Cs* La* Ce* B* Li* Be* Sc* Ti* Te*

F4-1 0.03 0.25 0.32 1 0 4.20 72 5.87

F4-2 0.07 0.25 0.61 2 0 21.90 330 2.93

F4-3 0.67 0.25 0.40 1 0 10.10 144 5.90

F4-4 3.01 0.70 1.87 1 0 7.80 474 3.97

F4-5 0.31 0.60 1.18 1 0 1.80 48 6.57

F4-6 0.16 0.25 0.20 1 0 1.90 15 10.10

HE0137.01 -1.00 8

HE0137.02 -1.00 3

HE0137.03 -1.00 3

HE0137.04 -1.00 25

HE0137.05 -1.00 12

HE0137.06 -1.00 -3

HE0137.07 -1.00 31

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

Sample No. Hf* Re* Tl*

F4-1 0.05 0 0

F4-2 0.10 0 0

F4-3 0.05 0 0

F4-4 0.10 0 0

F4-5 0.05 0 0

F4-6 0.05 0 0

HE0137.01

HE0137.02

HE0137.03

HE0137.04

HE0137.05

HE0137.06

HE0137.07

From - To	Activity	Comments
1707 - 1727	Regular production	Company/Institution :Røros Kobberverk
1870 - 1875	Regular production	Company/Institution :Fredrik Sjøstedt
1890 - 1891	Regular production	Company/Institution :Os-Hommelvik Kobberverk
1905 - 1908	Regular production	Company/Institution :Røros Kobberverk
1966 - 1966	Geophysics	Company/Institution :NGU
1998 - 1998	Sampling	Company/Institution :NGU

Era:	Paleozoic	Period:	Ordovician
Dating:		Method:
Genesis:	Hydrothermal vein	Form:	Irregular
Main texture:	Vein network	Min. distribution:	Semi-massive (20-50 % ore minerals)

	Province:	Caledonides
	Geotec.unit:	Trondheim Nappe Complex
	Tectonic complex:
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Calcite	Major mineral (>10%)
Gangue mineral	Actinolite	Major mineral (>10%)
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Garnet	Subordinate mineral (1-10%)
Gangue mineral	Chlorite	Subordinate mineral (1-10%)
Gangue mineral	Biotite	Accessory mineral (<1%)
Ore mineral	Chalcopyrite	Major mineral (>10%)
Ore mineral	Pyrrhotite	Major mineral (>10%)
Ore mineral	Magnetite	Subordinate mineral (1-10%)
Ore mineral	Pyrite	Subordinate mineral (1-10%)

Relationship	Rock	Origin
Host rock	Metagabbro	Intrusive Original rock :Gabbro
		Metamorphic facies :Greenschist
Host rock	Chlorite amphibole schist	Extrusive Original rock :Basalt
		Metamorphic facies :Greenschist

Location:	Type:	Orientation(360 gr.):	Relation to min.:
Host rock	Foliation	Strike/Dip :202 / 80	Post-mineralisation ;...Effect :Controls
Host rock	Foliation	Strike/Dip :214 / 63	Post-mineralisation ;...Effect :Controls
Host rock	Fold axis	Dir./Plunge :207 / 56	Post-mineralisation ;...Effect :Controls

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
F4-1	Dump	64200	123	2	111	13	8.0	2880.0
F4-2	Dump	10650	55	2	573	127	2.7	869.0
F4-3	Dump	48000	237	5	1710	409	7.7	706.0
F4-4	Dump	59200	513	6	523	120	17.0	1530.0
F4-5	Dump	37600	128	7	1940	478	23.1	970.0
F4-6	Dump	141000	643	10	1290	128	23.0	5400.0
HE0137.01	Dump	49760	256	27	687	85	7.8	728.0
HE0137.02	Dump	18711	43	8	187	28	2.9	305.0
HE0137.03	Dump	46368	125	16	440	52	6.6	572.0
HE0137.04	Dump	99798	486	-3	1778	288	20.7	3817.0
HE0137.05	Dump	70540	338	6	1018	199	14.2	234.0
HE0137.06	Dump	655	20	6	13	12	.4	21.0
HE0137.07	Dump	99999	983	24	1588	188	30.2	4680.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
F4-1	2.5	2.0	48	1.6	5	4.46	0	0	0
F4-2	6.0	13.0	9	.3	5	2.60	0	0	0
F4-3	7.0	3.0	13	5.4	10	12.25	0	0	0
F4-4	2.5	2.0	5	9.5	20	14.10	0	0	0
F4-5	2.5	9.0	13	2.2	10	6.88	0	0	1
F4-6	2.5	3.0	128	12.1	5	13.50	0	0	1
HE0137.01	1.0	1.0	208	4.4	16	13.00		-3	-3
HE0137.02	-1.0	2.0	2	.8	22	3.00		-3	6
HE0137.03	-1.0	-1.0	5	1.5	21	5.00		-3	11
HE0137.04	2.0	7.0	139	8.0	13	21.00		18	9
HE0137.05	1.0	5.0	-2	4.4	19	6.00		-3	14
HE0137.06	3.0	7.0	2	.4	9	2.00		-3	-3
HE0137.07	2.0	4.0	253	16.3	16	24.00		55	124

Sample No.	Se*	Ga*	Ge*	In*	S%	V*	Cr*	Mn*	Fe%
F4-1	117.00	2.48	0.40	1.29	5.36	27	34	178	10.35
F4-2	94.00	8.65	0.33	0.36	5.43	121	242	603	15.20
F4-3	327.00	7.61	1.06	2.03	10.00	52	219	555	28.20
F4-4	99.00	3.99	0.33	1.05	7.33	53	102	909	15.10
F4-5	202.00	1.15	0.67	1.11	10.00	7	11	325	30.00
F4-6	304.00	2.86	0.97	2.28	10.00	10	39	311	25.50
HE0137.01						38	222	445	11.96
HE0137.02						10	67	700	4.15
HE0137.03						15	55	776	8.53
HE0137.04						13	47	456	26.89
HE0137.05						51	48	363	18.35
HE0137.06						12	28	1802	2.22
HE0137.07						8	24	432	26.57

Sample No.	Th*	U*	W*	Rb*	Sr*	Y*	Zr*	Nb*	Ta*
F4-1	0.04	0.05	0	0.2	10.1	1.1	0	0.10	0.03
F4-2	0.10	0.10	0	0.2	19.3	2.5	2	0.10	0.03
F4-3	0.04	0.10	0	2.1	41.1	1.9	1	0.10	0.03
F4-4	0.02	0.10	0	9.5	32.9	5.7	3	0.10	0.03
F4-5	0.02	0.05	0	0.8	8.6	2.4	1	0.05	0.03
F4-6	0.01	0.05	0	0.4	15.2	0.5	1	0.05	0.03
HE0137.01	-2.00	-8.00	-2		19.0
HE0137.02	-2.00	-8.00	-2		25.0
HE0137.03	-2.00	-8.00	-2		20.0
HE0137.04	2.00	-8.00	-2		16.0
HE0137.05	-2.00	-8.00	-2		12.0
HE0137.06	-2.00	-8.00	-2		87.0
HE0137.07	2.00	-8.00	-2		16.0