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	THE ???? DATABASE
	Prospect 0 - 000 FEIL
	(Object Id: ) (Last updated: 18.03.2024)

Products

	Element/product	Crude ore grade or quality	Reg. date
	Cu	0.8 %	31.01.2001
	Zn	2.4 %	31.01.2001

Operations

	From - To	Activity	Comments
	1860 - 1878	Regular production	Company/Institution :Folldal Interessentskab
	1919 - 1919	Core drilling	Company/Institution :The Foldal Copper and Sulphur ltd.
	1939 - 1939	Core drilling	Company/Institution :Folldal Verk A/S
	1940 - 1940	Core drilling	Company/Institution :Folldal Verk A/S
	1940 - 1945	Test mining	Company/Institution :Folldal Verk A/S
	1950 - 1950	Core drilling	Company/Institution :Folldal Verk A/S
	1952 - 1952	Core drilling	Company/Institution :Folldal Verk A/S
	1952 - 1965	Regular production	Company/Institution :Folldal Verk A/S
	1954 - 1954	Core drilling	Company/Institution :Folldal Verk A/S
	1956 - 1956	Core drilling	Company/Institution :Folldal Verk A/S
	1958 - 1958	Core drilling	Company/Institution :Folldal Verk A/S
	1961 - 1961	Core drilling	Company/Institution :Folldal Verk A/S
	1967 - 1967	Core drilling	Company/Institution :Folldal Verk A/S
	1990 - 1993	Detail mapping	Company/Institution :T. Bjerkgård, University of Oslo
	1999 - 1999	Sampling	Company/Institution :NGU Mineralressurser

Mineralization

	Era:	Paleozoic	Period:	Ordovician
	Genesis:	Volcex	Form:	Lens
	Main texture:	Banded	Min. distribution:	Massive (>50 % ore minerals)

Main grain size:

Medium grained (1-3 mm)

Main alteration:

Sericitisation

	Strike/Dip:		Direction:	0
			Plunge:	65

Stratigraphic classification of host rock

Era:

Paleozoic

Period:

Ordovician

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

Group:

Fundsjø Group

Formation:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Quartz	Major mineral (>10%)
	Gangue mineral	Calcite	Major mineral (>10%)
	Gangue mineral	Chlorite	Subordinate mineral (1-10%)
	Gangue mineral	Sericite	Subordinate mineral (1-10%)
	Gangue mineral	Biotite	Accessory mineral (<1%)
	Gangue mineral	Talc	Accessory mineral (<1%)
	Gangue mineral	Dolomite	Accessory mineral (<1%)
	Gangue mineral	Ankerite	Accessory mineral (<1%)
	Gangue mineral	Titanite	Accessory mineral (<1%)
	Ore mineral	Pyrite	Major mineral (>10%)
	Ore mineral	Sphalerite	Major mineral (>10%)
	Ore mineral	Pyrrhotite	Subordinate mineral (1-10%)
	Ore mineral	Chalcopyrite	Subordinate mineral (1-10%)
	Ore mineral	Bismuth	Accessory mineral (<1%)
	Ore mineral	Altaite	Accessory mineral (<1%)
	Ore mineral	Molybdenite	Accessory mineral (<1%)
	Ore mineral	Tellurobismuthite	Accessory mineral (<1%)
	Ore mineral	Galena	Accessory mineral (<1%)
	Ore mineral	Electrum	Accessory mineral (<1%)
	Ore mineral	Pentlandite	Accessory mineral (<1%)
	Ore mineral	Hessite	Accessory mineral (<1%)

Lithology:

	Relationship	Rock	Origin
	Wall rock	Quartz keratophyre	Extrusive Original rock :Rhyodacite
			Metamorphic facies :Greenschist
	Wall rock	Chlorite-amphibole schist	Extrusive Original rock :Basalt
			Metamorphic facies :Greenschist
	Wall rock	Metagabbro	Intrusive Original rock :Gabbro
			Metamorphic facies :Greenschist
	Wall rock	Banded chlorite schist	Sedimentary Original rock :Tuffite
			Metamorphic facies :Greenschist
	Wall rock	Metagreywacke
			Metamorphic facies :Greenschist
	Wall rock	Quartz feldspar schist	Sedimentary Original rock :Tuffite
			Metamorphic facies :Greenschist
	Wall rock	Graphite schist
			Metamorphic facies :Greenschist

Information(s) in free text format

Free text

The Søndre Geitryggen deposit was in the earliest periods 1770-1848 and 1860-1878 mined for copper in the eastern part of the deposit where the copper grades were the highest (stringer zone), while copper, zinc and pyrite were mined in the western zinc-dominated part in the last mining period (1952-1965). In total c. 0.5 Mt of ore grading 0.8 % Cu, 2.4 % Zn was taken out, and the mine had a strike length of 400 m and a vertical depth of 165 m. Mining ended because workers were needed in the new, large mine at Tverrfjellet, not because the deposit was mined out. The deposit is situated in the upper parts of a 20-50 m rhyodacite lens, in contact with overlying tuffitic schists. The main massive ore is a banded pyrite-sphalerite ore.

Bibliography:

From NGU's Reference Archive:

Riiber, Carl C. , 1923

	Rapporter over kis -og kobbergruber og skjerp i Foldal, Dovre og Alvdal herreder.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 3194;25 pages

Abstract:

Rapporten omfatter følgende gruver og skjerp: I. Foldals verks gruber: a. Hovedgruben. b. Nordre Gjeitryggen grube. c. Søndre jetryggen grube, d. Grev Moltke grube. e. Grimsdalen grube. f. Storthaab grube. g. Boksberg grube. II. Statens kisanvisninger: a. Skjerp øst for Foldals verks hovedgrube. b. Stretlien skjerp. c. Grimsdalen skjerp. III. Grimsbo kisskjerp. IV. Rødalens kobbergrube. V. Tronfjeldets kobbergruber. VI. Verkjendalens kisfelt. Rapporten beskriver forekomstenes beliggenhet, geologiske forhold, malmen, resultater av undersøkelser (boringer, analyser osv.), salgspriser, historiske forhold, juridiske forhold og kraftsituasjonen. Forekomstnr.: 1. 10963, 2. 10973 og 3. 10991. Forekomstens navn og koordinater: 1. Folldal 32 5521 68908, 2. Verkensdalen 32 5281 68816, 3. Gamle Tron 32 5862 68910.

Marlow, Wolmer , 1935

	Foldal. Beskrivelse til geologiske rektangelkart. D. Grubebeskrivelser. 1. Beskrivelse av Foldals kisfelt: 1. Foldals verks gruber. 2. Statens kisanvisninger. 3. Grimsboskjerpene. 4. Rødalens grube. 5. Tronfjellets grube. 6. Verkjensdalens kisfelt.

;Norges geologiske undersøkelse;KARTBESKRIVELSE; TIDSSKRIFTARTIKKEL;NGU; No.145;69-96 pages

Bugge, Arne , 1948

	Folldal Verk. Malmforekomster og grubedrift.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 4575;6 pages

Abstract:

Malmforekomstene tilhører det kjente Tronheimsfelt og er knyttet til bergarter som er vanlig ved Trondheimsfeltets kisgruver. Natrongranitt (Trondheimitt), gabbrobergarter og amfibolitt forekomer i de vanlige Skifrene av Trondheimstypen, og kisforekomstene er utskilt langs granitt -og amfibolittgrensene på lingnende måte, som man kjenner det fra andre felter. Som særpreget for Folldalsgruvene kan bemerkes: 1. - Malmens kvalitet er relativt god. 2. - Kisen forekommer i linser av en annen form og størrelse samt opptreden enn ved de fleste andre gruver i Trondheimsfeltet. Først i de senere år har gruvedriften vært ført så langt frem at man har kunnet øyne en lovmessighet ved malmlinsenes opptreden. SØLV OG GULL forekommer i større mengder i kobberkisen fra Folldals Verks gruver enn ved andre norske kisgruver. Rent kobber oppgis å holde 25 gr. gull og 1 500 gr. sølv pr. tonn. Av foranstående fremstilling fremgår det at det i gruvene er oppfart malm for 7 års drift, når det regnes med en produksjon av 60 000 t. råmalm. Enn videre fremgår at det er gode muligheter for å finne mer malm enn den som nå er påvist.

Robellaz, Fernand; Helland, Amund; Lund, Worm H. , 1905

	Reports on THE FOLDAL COPPER MINES, NORWAY.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 2261;33 pages

	Abstract:
	Rapporten beskriver: Forekomstenes beliggenhet, gruvene, dannelse og gangenes retninger, malmreserver, tilgjengelige malmlegemer, drift, malmtransport, utnytting av forekomstene og økonomiske forhold.

Bjerkgård, Terje , 1995

	The stratabound massive sulfide deposits in the Folldal area, southern Trondheim region Caledonides, Norway.

;UiO Geologisk fellesråd;AVHANDLING

Bjerkgård, Terje; Bjørlykke, Arne , 1994

	The stratabound sulphide deposits in the Folldal area, Southern Trondheim Region, Norway

;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.74 (4);213-237 pages

Abstract:

Frie emneord: Lagdelt, Malmgenese Five strata-bound massive sulphide deposits are situated at three different stratigraphic levels in the volcanogenic Fundsjø group in the Folldal area. The deposits are hosted in metabasalts, metarhyodacites and volcanoclastic rocks and belong to the Cu-Zn class of volcanic-associated massive sulphide deposits. The metal content of the deposits indicates that the sources of metals are underlying strata, possibly with a contribution from intrusives. Wall rock alteration varies according to differences in host rocks, and is probably a result of chemical variations of the host rocks, temperature differences and proximity to the hydrothermal vent. The clustering of deposits in the Folldal area is considered to be due to the occurrence of a large sub- volcanic trondhjemitic intrusion which acted as the major heat engine for convection. The small size of the deposits might be related to the shallow level of the intrusion.

Singsaas, P. , 1959

	Geofysisk undersøkelse 1. Grimsdal Grube - Husumskogen 2. Verket - Knutshovdet 3. Søndre Gjetryggen Grube - Grimsbu.

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.173;10 pages

Bugge, Arne , 1948

	Rapport fra befaring ved Folldal gruver.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 784;5 pages

Abstract:

Befaringsrapport for gruvene Nordre og Søndre Gjeiteryggen og Grev Moltke Gruve. Det fremgår av ovenstående utredning at gruvene er drevet på kislinjaler og linser. De enkelte kislinjalene er i forhold til andre kislinjaler i Tronheimsdistriktet av relativt liten utstrekning; men ved vellykkete skjerpningsarbeider i dagen og i gruvene har man stadig funnet nye linser og linjaler når de gamle er utdrevet. Gruvedriften blir på denne måten kostbar, da de nye forekomster stadig drar seg bort fra de gamle sjakter.

Hillestad, G.; Brækken, H. , 1953

	Seismiske dybdemålinger Søndre Gjetryggen Grube.

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.106;3 pages

	Abstract:
	Oppgaven gikk ut på å bestemme overdekkets mektighet på et sted hvor Folldal Verk A/S var i ferd med å føre en stigort fra en grubegang frem i dagen. Det ble utført seismiske refraksjonsmålinger langs et profil av ca. 120 meter lengde. Målingene tyder på at overdekkets mektighet varierer mellom 6 og 10 meter.

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

Heim, J.G. 1972: Zur geologie des Südlichen Trondheim-gebietes. Unpubl. Ph.D. thesis, Univ. Mainz, 156 pp.

Per B. Støen 1948: Folldal Verk gjennom 200 år. Historiske trekk: 1748-1948. festskrift Folldal Verk A/S, 70 sider.

Hjelseth, G. & Einarsen S. 1950: Folldal Verk. Tidsskrift for kjemi, bergvesen og metallurgi, vol.10, no.2b, p.70-73.

Bjerkgård, T. & Bjørlykke, A. 1995: Geology of the Folldal area, southern Trondheim Region Caledonides, Norway. NGU bull. 426, p.53-75.

Bjerkgård, T. & Bjørlykke A.,1996: Sulfide deposits in Folldal, Southern Trondheim Region Caledonides, Norway: Source of metals and wall-rock alterations related to host rocks. Economic Geology vol.91, p.676-696.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	DBH35-1	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH35-2	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH35-3	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH35-4	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH43-1	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH43-2	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH43-3	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH44-1	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH44-2	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH44-3	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH44-4	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH44-5	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH44-6	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH45-1	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH45-2	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	HE0065.07	Dump	Sampler: T. Bjerkgård/...Stored: Løkken/...Size(kg): 3 Comment: Massive fine-grained pyrite-sphalerite with few aggregates of chalcopyrite. No. of registrated element analyses = 1
	HE0065.08	Dump	Sampler: T. Bjerkgård/...Stored: Løkken/...Size(kg): 3 Comment: Bands and lenses of finegrained pyrite, sphalerite and chalcopyrite in a matrix of quartz, chlorite, talc and carbonate. No. of registrated element analyses = 1
	HE0065.09	Dump	Sampler: T. Bjerkgård/...Stored: Løkken/...Size(kg): 3 Comment: Semimassive, relatively coarse pyrite-chalcopyrite mineralization in quartz-carbonate-chlorite matrix. No. of registrated element analyses = 1
	HE0065.10	Dump	Sampler: T. Bjerkgård/...Stored: Løkken/...Size(kg): 3 Comment: Complex, massive chalcopyrite-pyrrhotite-pyrite-sphalerite mineralization in chlorite-bearing quartz matrix. No. of registrated element analyses = 1
	St70-1	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	St70-2	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	St70-3	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	St70-4	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1

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

Name of Sample point: DBH 13

(Object Id: 39287 13,00,01)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Folldal (1519-2)

Map 1:250000:

Røros

County:

UTM-Zone 33 - EUREF89/WGS84

Resource

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

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	DBH13-1	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH13-2	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH13-3	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1

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

Name of Sample point: DBH 15

(Object Id: 39288 13,00,02)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Folldal (1519-2)

Map 1:250000:

Røros

County:

UTM-Zone 33 - EUREF89/WGS84

Resource

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

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	DBH15-1	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1

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

Name of Sample point: DBH 16

(Object Id: 39289 13,00,03)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Folldal (1519-2)

Map 1:250000:

Røros

County:

UTM-Zone 33 - EUREF89/WGS84

Resource

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

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	DBH16-1	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH16-2	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH16-3	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH16-4	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1

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

Name of Sample point: DBH 17

(Object Id: 39290 13,00,04)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Folldal (1519-2)

Map 1:250000:

Røros

County:

UTM-Zone 33 - EUREF89/WGS84

Resource

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

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	DBH17-1	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH17-2	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1

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

Name of Sample point: DBH 18

(Object Id: 39291 13,00,05)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Folldal (1519-2)

Map 1:250000:

Røros

County:

UTM-Zone 33 - EUREF89/WGS84

Resource

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

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	DBH18-1	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH18-2	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1

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

Name of Sample point: DBH 19

(Object Id: 39292 13,00,06)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Folldal (1519-2)

Map 1:250000:

Røros

County:

UTM-Zone 33 - EUREF89/WGS84

Resource

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

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	DBH19-1	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH19-2	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH19-3	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1

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

Name of Sample point: DBH 57

(Object Id: 39293 13,00,07)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Folldal (1519-2)

Map 1:250000:

Røros

County:

UTM-Zone 33 - EUREF89/WGS84

Resource

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

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	DBH57-1	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH57-2	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH57-3	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH57-4	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH57-5	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1
	DBH57-6	Core	Sampler: T. Bjerkgård No. of registrated element analyses = 1

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

Name of Locality: Juliane Marie

(Object Id: 12397 13,01,00)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Folldal (1519-2)

Map 1:250000:

Røros

Coordinate system:

UTM-Zone 33 - EUREF89/WGS84

East:

557710 m.

North:

6889800 m.

Longitude:

10.1066710

Latitude:

62.1343000

Show on map

Resource

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

Resources and production

	Activity:	Mining	Reserves:
	Operating method:	Underground mining	Historical production:

Products

	Element/product	Crude ore grade or quality	Reg. date
	Cu		05.02.2001

Operations

	From - To	Activity	Comments
	1770 - 1780	Regular production	Company/Institution :Fredriks Gaves verk
	1990 - 1993	Detail mapping	Company/Institution :T. Bjerkgård, University of Oslo
	1999 - 1999	Sampling	Company/Institution :NGU mineralressurser

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Quartz	Major mineral (>10%)
	Gangue mineral	Chlorite	Major mineral (>10%)
	Gangue mineral	Biotite	Subordinate mineral (1-10%)
	Gangue mineral	Muscovite	Subordinate mineral (1-10%)
	Gangue mineral	Carbonate	Accessory mineral (<1%)
	Gangue mineral	Clinoamphibole	Accessory mineral (<1%)
	Ore mineral	Chalcopyrite	Major mineral (>10%)
	Ore mineral	Pyrrhotite	Major mineral (>10%)
	Ore mineral	Pyrite	Subordinate mineral (1-10%)
	Ore mineral	Sphalerite	Subordinate mineral (1-10%)
	Ore mineral	Electrum	Accessory mineral (<1%)
	Ore mineral	Hessite	Accessory mineral (<1%)

Lithology:

	Relationship	Rock	Origin
	Wall rock	quartz keratophyre	Extrusive Original rock :Rhyodacite
			Metamorphic facies :Greenschist

Information(s) in free text format

Free text

Lite er kjent om driften i Juliane Marie, som er en av de to østlige gruvene i Søndre Geitryggen. Den var i drift i perioden 1770-1780, på samme tid som nabogruva Godthaab. Driften var beskjeden og gruva er kun drevet ned til et dyp av 30 m under dagen og horisontalt 75 m, så antakelig var det kun drift i denne perioden. Det ble i en senere periode laget et gjennomslag mellom de to gruvene, sannsynligvis en gang i perioden 1829 til 1845, da Røros Kobberverk drev Godthaab. I den siste driftsperioden i Oluf Olsen ble det også drevet en stoll fra denne inn i Juliane Marie. I dag er alle åpninger inn i Juliane Marie gjenfylt, og det er ingenting å se. Malmen i Juliane Marie bestod som i Godthaab av slirer, årer og linser av kobberkis-magnetkis i kvarts-klorittskifer og representerte tilførselsonen til forekomsten i Søndre Geitryggen.

Bibliography:

From NGU's Reference Archive:

Riiber, Carl C. , 1923

	Rapporter over kis -og kobbergruber og skjerp i Foldal, Dovre og Alvdal herreder.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 3194;25 pages

Abstract:

Rapporten omfatter følgende gruver og skjerp: I. Foldals verks gruber: a. Hovedgruben. b. Nordre Gjeitryggen grube. c. Søndre jetryggen grube, d. Grev Moltke grube. e. Grimsdalen grube. f. Storthaab grube. g. Boksberg grube. II. Statens kisanvisninger: a. Skjerp øst for Foldals verks hovedgrube. b. Stretlien skjerp. c. Grimsdalen skjerp. III. Grimsbo kisskjerp. IV. Rødalens kobbergrube. V. Tronfjeldets kobbergruber. VI. Verkjendalens kisfelt. Rapporten beskriver forekomstenes beliggenhet, geologiske forhold, malmen, resultater av undersøkelser (boringer, analyser osv.), salgspriser, historiske forhold, juridiske forhold og kraftsituasjonen. Forekomstnr.: 1. 10963, 2. 10973 og 3. 10991. Forekomstens navn og koordinater: 1. Folldal 32 5521 68908, 2. Verkensdalen 32 5281 68816, 3. Gamle Tron 32 5862 68910.

Bjerkgård, Terje; Bjørlykke, Arne , 1994

	The stratabound sulphide deposits in the Folldal area, Southern Trondheim Region, Norway

;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.74 (4);213-237 pages

Abstract:

Frie emneord: Lagdelt, Malmgenese Five strata-bound massive sulphide deposits are situated at three different stratigraphic levels in the volcanogenic Fundsjø group in the Folldal area. The deposits are hosted in metabasalts, metarhyodacites and volcanoclastic rocks and belong to the Cu-Zn class of volcanic-associated massive sulphide deposits. The metal content of the deposits indicates that the sources of metals are underlying strata, possibly with a contribution from intrusives. Wall rock alteration varies according to differences in host rocks, and is probably a result of chemical variations of the host rocks, temperature differences and proximity to the hydrothermal vent. The clustering of deposits in the Folldal area is considered to be due to the occurrence of a large sub- volcanic trondhjemitic intrusion which acted as the major heat engine for convection. The small size of the deposits might be related to the shallow level of the intrusion.

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

Per B. Støen 1948: Folldal Verk gjennom 200 år. Historiske trekk: 1748-1948. festskrift Folldal Verk A/S, 70 sider.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	HE0065.04	Dump	Sampler: T. Bjerkgård/...Stored: Løkken/...Size(kg): 3 Comment: Chlorite-bearing quartz-sericite schist with rich impregnation of pyrite. No. of registrated element analyses = 1
	HE0065.05	Dump	Sampler: T. Bjerkgård/...Stored: Løkken/...Size(kg): 3 Comment: Quartz-chlorite schist with streaks and lenses of pyrrhotite and minor chalcopyrite in biotite- and amphibole-bearing, dark green chlorite schist. No. of registrated element analyses = 1
	HE0065.06	Dump	Sampler: T. Bjerkgård/...Stored: Løkken/...Size(kg): 3 Comment: Sericite-quartz schist containing rich chalcopyrite-pyrrhotite impregnation. No. of registrated element analyses = 1

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

Name of Locality: Godthaab

(Object Id: 12398 13,02,00)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Folldal (1519-2)

Map 1:250000:

Røros

Coordinate system:

UTM-Zone 33 - EUREF89/WGS84

East:

557770 m.

North:

6889820 m.

Longitude:

10.1078280

Latitude:

62.1344700

Show on map

Resource

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

Resources and production

	Activity:	Mining	Reserves:
	Operating method:	Underground mining	Historical production:

Products

	Element/product	Crude ore grade or quality	Reg. date
	Cu		05.02.2001

Operations

	From - To	Activity	Comments
	1770 - 1780	Regular production	Company/Institution :Fredriks Gaves verk
	1829 - 1845	Regular production	Company/Institution :Røros Kobberverk
	1990 - 1993	Detail mapping	Company/Institution :T. Bjerkgård, University of Oslo
	1999 - 1999	Sampling	Company/Institution :NGU mineralressurser

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Chlorite	Major mineral (>10%)
	Gangue mineral	Quartz	Major mineral (>10%)
	Gangue mineral	Carbonate	Accessory mineral (<1%)
	Gangue mineral	Biotite	Accessory mineral (<1%)
	Gangue mineral	Clinoamphibole	Accessory mineral (<1%)
	Gangue mineral	Muscovite	Accessory mineral (<1%)
	Ore mineral	Chalcopyrite	Major mineral (>10%)
	Ore mineral	Pyrrhotite	Major mineral (>10%)
	Ore mineral	Pyrite	Subordinate mineral (1-10%)
	Ore mineral	Sphalerite	Subordinate mineral (1-10%)
	Ore mineral	Hessite	Accessory mineral (<1%)
	Ore mineral	Galena	Accessory mineral (<1%)
	Ore mineral	Electrum	Accessory mineral (<1%)

Lithology:

	Relationship	Rock	Origin
	Wall rock	quartz keratophyre	Extrusive Original rock :Rhyodacite
			Metamorphic facies :Greenschist

Information(s) in free text format

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Godthaab representerer sammen med Juliane Marie de østlige gruvene på Søndre Geitryggen forekomsten. Disse gruvene var først i drift i perioden 1770-1780 under Fredriks Gaves verk og det ble også drevet et gjennomslag mellom disse. Røros Kobberverk tok opp drift på Godthaab i 1829 og drev antakelig gruva fram til nedleggelsen i 1848. I denne perioden ble det drevet inn en grunnstoll som kom inn på malmnivået på 30 meters dyp. Imidlertid var malmen av dårlig kvalitet, kvartsrik og tungt smeltelig. Selskapet som startet opp igjen i 1906, the Folldal Copper and Sulphur ltd., lenset gruva, men fant fort ut at det ikke var noen malm å drive på. I dag er alle gruveåpninger gjenfylt med unntak av de ytre 50-60 meter av grunnstollen. Det er således ingenting å se av mineraliseringer. Sjakten i Godthaab som ble anlagt i den første driftsperioden gikk til et dyp på 50 meter og det totale oppfarte felt under begge driftsperioder utgjorde ca. 90 meter i utstrekning. Malmen i Godthaab bestod som i Juliane Marie av slirer, årer og linser av kobberkis-magnetkis mineralisering i kvarts-klorittskifer og representerte tilførselsonen til forekomsten i Søndre Geitryggen.

Bibliography:

From NGU's Reference Archive:

Riiber, Carl C. , 1923

	Rapporter over kis -og kobbergruber og skjerp i Foldal, Dovre og Alvdal herreder.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 3194;25 pages

Abstract:

Rapporten omfatter følgende gruver og skjerp: I. Foldals verks gruber: a. Hovedgruben. b. Nordre Gjeitryggen grube. c. Søndre jetryggen grube, d. Grev Moltke grube. e. Grimsdalen grube. f. Storthaab grube. g. Boksberg grube. II. Statens kisanvisninger: a. Skjerp øst for Foldals verks hovedgrube. b. Stretlien skjerp. c. Grimsdalen skjerp. III. Grimsbo kisskjerp. IV. Rødalens kobbergrube. V. Tronfjeldets kobbergruber. VI. Verkjendalens kisfelt. Rapporten beskriver forekomstenes beliggenhet, geologiske forhold, malmen, resultater av undersøkelser (boringer, analyser osv.), salgspriser, historiske forhold, juridiske forhold og kraftsituasjonen. Forekomstnr.: 1. 10963, 2. 10973 og 3. 10991. Forekomstens navn og koordinater: 1. Folldal 32 5521 68908, 2. Verkensdalen 32 5281 68816, 3. Gamle Tron 32 5862 68910.

Bjerkgård, Terje; Bjørlykke, Arne , 1994

	The stratabound sulphide deposits in the Folldal area, Southern Trondheim Region, Norway

;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.74 (4);213-237 pages

Abstract:

Frie emneord: Lagdelt, Malmgenese Five strata-bound massive sulphide deposits are situated at three different stratigraphic levels in the volcanogenic Fundsjø group in the Folldal area. The deposits are hosted in metabasalts, metarhyodacites and volcanoclastic rocks and belong to the Cu-Zn class of volcanic-associated massive sulphide deposits. The metal content of the deposits indicates that the sources of metals are underlying strata, possibly with a contribution from intrusives. Wall rock alteration varies according to differences in host rocks, and is probably a result of chemical variations of the host rocks, temperature differences and proximity to the hydrothermal vent. The clustering of deposits in the Folldal area is considered to be due to the occurrence of a large sub- volcanic trondhjemitic intrusion which acted as the major heat engine for convection. The small size of the deposits might be related to the shallow level of the intrusion.

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

Per B. Støen 1948: Folldal Verk gjennom 200 år. Historiske trekk: 1748-1948. festskrift Folldal Verk A/S, 70 sider.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	HE0065.01	Dump	Sampler: T. Bjerkgård/...Stored: Løkken/...Size(kg): 3 Comment: Massive pyrrhotite with scattered cubes of pyrite and aggregates of chalcopyrite. Some imbedded fragments of sericitic schist. No. of registrated element analyses = 1
	HE0065.02	Dump	Sampler: T. Bjerkgård/...Stored: Løkken/...Size(kg): 3 Comment: Amphibole-chlorite-quartz rock with lenses of pyrrhotite and chalcopyrite. No. of registrated element analyses = 1
	HE0065.03	Dump	Sampler: T. Bjerkgård/...Stored: Løkken/...Size(kg): 3 Comment: Rich impregnation of chalcopyrite, some pyrrhotite in muscovite- and chlorite-bearing quartz rock. No. of registrated element analyses = 1

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

Name of Locality: Svendsbekken sjakt

(Object Id: 12399 13,03,00)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Folldal (1519-2)

Map 1:250000:

Røros

Coordinate system:

UTM-Zone 33 - EUREF89/WGS84

East:

557120 m.

North:

6889670 m.

Longitude:

10.0953170

Latitude:

62.1332230

Show on map

Resource

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

Resources and production

	Activity:	Mining	Reserves:
	Operating method:	Underground mining	Historical production:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Sericite	Major mineral (>10%)
	Gangue mineral	Quartz	Major mineral (>10%)
	Ore mineral	Pyrite	Major mineral (>10%)
	Ore mineral	Chalcopyrite	Subordinate mineral (1-10%)

Information(s) in free text format

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Gjenfylt sjakt i furuskogen vest for Oluf Olsen. Denne var etter alt å dømme anlagt i den siste driftsperioden, dvs. 1952-1965. Lite mineralisering å se på tipphaugen, det som finnes er båndet pyrittimpregnasjon med mindre mengder kobberkis i kvarts-sericittskifer. Det er ellers ingen blotninger i området.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	HE0065.11	Dump	Sampler: T. Bjerkgård/...Stored: Løkken/...Size(kg): 3 Comment: Impregnation of pyrite with minor chalcopyrite in cm-thick bands in quartz-sericite schist. No. of registrated element analyses = 1

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

Name of Locality: Søndre Geitryggen skjerp1

(Object Id: 12400 13,04,00)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Folldal (1519-2)

Map 1:250000:

Røros

Coordinate system:

UTM-Zone 33 - EUREF89/WGS84

East:

558050 m.

North:

6889900 m.

Longitude:

10.1132220

Latitude:

62.1351450

Show on map

Resource

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

Resources and production

	Activity:	Pitting	Reserves:
	Operating method:		Historical production:

Operations

	From - To	Activity	Comments
		Pitting	Company/Institution :?

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Graphite	Major mineral (>10%)
	Gangue mineral	Clinoamphibole	Subordinate mineral (1-10%)
	Gangue mineral	Quartz	Subordinate mineral (1-10%)
	Gangue mineral	Muscovite	Subordinate mineral (1-10%)
	Ore mineral	Pyrrhotite	Major mineral (>10%)
	Ore mineral	Chalcopyrite	Accessory mineral (<1%)

Lithology:

	Relationship	Rock	Origin
	Wall rock	Graphite schist	Sedimentary Original rock :Bituminous argillite
			Metamorphic facies :Greenschist

Information(s) in free text format

Free text

Dette skjerpet ligger i skogen øst for Søndre Geitryggen. Det har ingen tilknytning til mineraliseringen i Søndre. Mineraliseringen er tilknyttet en grafittskiferhorisont og er en primær sulfidanrikning i tilknytning til denne. Skjerpet er en gjenfylt grop, sannsynligvis med omriss på 5x3 meter. Tippvolumet har minst vært 100 kbm. Mineraliseringen består av slirer med magnetkis og litt kobberkis i grafittskifer. I skiferen opptrer det bånd og slirer anriket i fibrig klinoamfibol, som kan være gruneritt og/eller aktinolitt.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	HE0065.12	Dump	Sampler: T. Bjerkgård/...Stored: Løkken/...Size(kg): 3 Comment: Lenses of pyrrhotite and accessory chalcopyrite in amphibole-bearing graphite schist. No. of registrated element analyses = 1

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

Name of Locality: Søndre Geitryggen skjerp2

(Object Id: 12401 13,05,00)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Folldal (1519-2)

Map 1:250000:

Røros

Coordinate system:

UTM-Zone 33 - EUREF89/WGS84

East:

557910 m.

North:

6889930 m.

Longitude:

10.1105480

Latitude:

62.1354360

Show on map

Resource

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

Resources and production

	Activity:	Pitting	Reserves:
	Operating method:		Historical production:

Operations

	From - To	Activity	Comments
		Pitting	Company/Institution :?

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Graphite	Major mineral (>10%)
	Gangue mineral	Clinoamphibole	Subordinate mineral (1-10%)
	Gangue mineral	Quartz	Subordinate mineral (1-10%)
	Ore mineral	Pyrrhotite	Major mineral (>10%)

Lithology:

	Relationship	Rock	Origin
	Wall rock	Graphite schist	Sedimentary Original rock :Bituminous argillite
			Metamorphic facies :Greenschist

Information(s) in free text format

Free text

Skjerpet ligger i skogen øst for Søndre Geitryggen og består av et lite innhugg i en skrent, ca 7x2 m i utstrekning og inntil 1 m dypt. Mineraliseringen er slirer med magnetkis i dels meget ren grafittmatriks, dels sammen med en del kvarts og nåler av klinoamfibol. Mineraliseringen har ingen tilknytning til Søndre Geitryggen forekomsten, men er en primær anrikning i grafittskiferen.

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