Fact Sheet for <b>Deposit 1833

					Norsk versjon
	THE ORE DATABASE
	Deposit 1833 - 088 Båsmo
	(Object Id: 2789) (Last updated: 19.02.2019)

Location

County:

Nordland

Municipality:

Rana (1833)

Map 1:50000:

Mo i Rana (1927-1)

Map 1:250000:

Mo i Rana

Coordinate system:

EU89-UTM Zone 33

East:

458931 m.

North:

7357448 m.

Longitude:

14.0830990

Latitude:

66.3340720

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Resource

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

Importance

Raw material meaning:

Little Importance (reg. 29.05.2015)

Resources and production

	Activity:	Mining	Reserves:	700 thousand tons
	Operating method:	Underground mining	Historical production:	1850 thousand tons

Products

Element/product Crude ore grade or quality Reg. date

Cu .13 % 03.06.1992

S 20 % 03.06.1992

Zn .14 % 03.06.1992

Operations

From - To Activity Comments

1894 - 1921 Regular production Company/Institution :Bossmo Grube

1926 - 1929 Regular production Company/Institution :2 privatmenn

1932 - 1937 Regular production Company/Institution :Verkets arbeidere med statsstøtte

Mineralization

Era: Paleozoic Period: Ordovician

Genesis: Sedex Form: Ruler

Main texture: Banded Min. distribution: Massive (>50 % ore minerals)

Main grain size: Coarse grained (> 3 mm) Main alteration: Chloritisation

Strike/Dip: 90 / 50 Direction: 90

Plunge: 20

Stratigraphic classification of host rock

Era: Period:

Province: Caledonides

Geotec.unit: Rødingsfjell Nappe Complex

Tectonic complex: Midtre allokton

Igneous complex:

Group: Plurdalsgruppen Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Potassic feldspar Major mineral (>10%)

Gangue mineral Plagioclase Major mineral (>10%)

Gangue mineral Chlorite Major mineral (>10%)

Gangue mineral Garnet Subordinate mineral (1-10%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Chalcopyrite Accessory mineral (<1%)

Ore mineral Sphalerite Accessory mineral (<1%)

Lithology:

Relationship Rock Origin

Wall rock Garnet chlorite schist Sedimentary
Original rock :Greywacke

Metamorphic facies :Amphibolite

Structures

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

Unknown Primary layering Strike/Dip :90 / 50 Syn-mineralisation ;...Effect :None

Information(s) in free text format

Free text

The Båsmo deposit is a sulfide deposit, which consisted of four individual, ruler-shaped pyrite bodies in an en-echelon pattern along the regional strike for nearly 2 km. A total of 1.85 mill. t of ore with 20 % S, 0.13 % Cu and 0.14 % Zn was produced from the two main ore bodies to produce a pyrite concentrate with 49 % S, 44 % Fe, 0.4 % Cu and 0.4 % Zn. The ore consists of 1-5 mm pyrite grains with interstitial quartz and accessory hornblende, K-feldspar, plagioclase chlorite and garnet. It also contains accessory sphalerite and chalcopyrite. The ore bodies consists of parallel massive bands separated by weaker impregnations. All of the ore bodies of the Båsmo deposit are situated in a unit of garnet-chlorite schist, which is partly pyrite-bearing. Structurally above the deposit is a major unit of amphibolite and below is calcareous mica schist and garnet-mica schist.

Bibliography:

From NGU's Reference Archive:

Lindgård, B. , 1963

Båsmo - Malmhaug, Nord-Rana.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 4426;4 pages

Abstract:

Arbeidet besto i å bli kjent med sulfidmalmens paragenser i området. Forekomstene er delt inn i tre typer: 1) Båsmo - Malmhaugtypen, 2) Flatli - Sterdaltypen, 3) Malmhaug - Flatli-forekomsten av Bleikvassli-typen, 4) Mosgruben-typen. Dette er en foreløpig rapport for en hovedfagsoppgave.

Hofseth, A. , 1939

Elektriske og Elektromagnetiske målinger ved Båsmo og Malmhaug gruber - høsten 1939.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 1133;6 pages

Abstract:

lok. Nr. 40419, 40442. Dette er en foreløpig rapport til GM-rapp. nr. 17 (NGU-rapp. nr. 17). Rapporten mangler to kart som skulle vært vedlagt. Hofseth sier at malmsonens bergart ved Båsmo inneholder sedimenter og kanskje sure intrusiver. Bergarten er sterkt tektoniserte sure intrusiver. Bergarten er sterkt tektonisert og klorittisert. Strekningsstruktur og malmakse diskuteres ut fra uttalelser fra Foslie og Vogt. Betegner også bergarter ved Malmhaug som metasomatisk.

Fieldsamples

Sample No. Sample type Miscellanrous

BÅSMO-1 Dump

Sampler: T. Bjerkgård

Comment: Massive pyrite ore

No. of registrated element analyses = 1

BÅSMO-2 Dump

Sampler: T. Bjerkgård

Comment: semimassive pyrite ore

No. of registrated element analyses = 1

BÅSMO-3 Dump

Sampler: T. Bjerkgård

Comment: Massive pyrite ore

No. of registrated element analyses = 1

BÅSMO-4 Dump

Sampler: T. Bjerkgård

Comment: semimassive pyrite ore

No. of registrated element analyses = 1

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

Name of Locality: Bjørnhauggangen

(Object Id: 3458 88,01,00)

Location

County: Nordland Municipality: Rana (1833)

Map 1:50000: Mo i Rana (1927-1) Map 1:250000: Mo i Rana

Coordinate system: EU89-UTM Zone 33

East: 457996 m. North: 7357098 m.

Longitude: 14.0623580 Latitude: 66.3308100

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Resource

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

Element(s): Kis

Resources and production

Activity: Mining Reserves:

Operating method: Underground mining Historical production:

Information(s) in free text format

Free text

Bjørnhauggangen er kjent ved flere røsker som viser fattig impregnasjon med feltlengde 250m. Gjennomsnittstykkelse er ca. 2m. Den største røsken viser 6m god impregnasjon, men brukbart malmareal er neppe over 200m2. Malmen på dypet er påvist i et tverrslag fra en av Fjeldgangens feltorter på nivå 254. Dette tverrslag viste noen desimeter svovelkis, foruten impregnasjon. I 1934-35 ble det stålsandboret 3 loddrette hull 112m, 103m og 51m dype som viser to-tre 0.1-0.3m tykke svovelkisbånd i en fattig impregnasjonssone.

Name of Locality: Fjeldgangen

(Object Id: 3459 88,02,00)

Location

County: Nordland Municipality: Rana (1833)

Map 1:50000: Mo i Rana (1927-1) Map 1:250000: Mo i Rana

Coordinate system: EU89-UTM Zone 33

East: 458437 m. North: 7357268 m.

Longitude: 14.0721380 Latitude: 66.3323970

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Resource

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

Element(s): Kis

Resources and production

Activity: Mining Reserves:

Operating method: Underground mining Historical production:

Information(s) in free text format

Free text

Fjeldgangen er åpnet fra Hovedgangen ved to feltorter. Den øvre på nivå 254 og den nedre (Krokremmen) på nivå 133. Fjeldgangen er nesten helt avbygget til dette nivå 133. Uttatt råmalm: 478500 tonn. Akselengde for utdrevet parti: 380m. Gj.sn. brytningshøyde: 4.7m. Linjalbredde: 82m. I 1935 er stålsandboret to loddrette hull 192m og 193m dype. I dybde 161.5m og 187.5m er det i 192m-hullet hhv. 1.5m og 2.5m tykke vekslende lag ren kis og delvis rik impregnasjon. Fjeldgangen har altså delt seg i to parallelle kisbenker med avstand 26m. I 193m-hullet er påtruffet 0.75m ren kis i dybde 165m. Boringen har således bekreftet at Fjeldgangen fortsetter 400m videre langs aksen fra Krokremmen. Men den kjente linjalbredden er her kun 40m. Fra 1926 til driftsstansen i 1937 har produksjonen for det meste foregått i Fjeldgangen. Fjeldgang-kisen fortsetter 400m videre østover fra Krokremmen, dog med noe mindre malmareal (i følge ovennevnte boring). Reservene er maksimalt 400000 tonn svovelkis-malm.

Name of Locality: Aanesgangen

(Object Id: 3460 88,03,00)

Location

County: Nordland Municipality: Rana (1833)

Map 1:50000: Mo i Rana (1927-1) Map 1:250000: Mo i Rana

Coordinate system: EU89-UTM Zone 33

East: 459432 m. North: 7357697 m.

Longitude: 14.0942150 Latitude: 66.3363720

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Resource

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

Element(s): Kis

Resources and production

Activity: Mining Reserves:

Operating method: Underground mining Historical production:

Name of Locality: Nymalmen

(Object Id: 3461 88,04,00)

Location

County: Nordland Municipality: Rana (1833)

Map 1:50000: Mo i Rana (1927-1) Map 1:250000: Mo i Rana

Coordinate system: EU89-UTM Zone 33

East: 459632 m. North: 7357947 m.

Longitude: 14.0986000 Latitude: 66.3386400

Show on map

Resource

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

Element(s): Kis

Resources and production

Activity: Mining Reserves:

Operating method: Underground mining Historical production:

Analyse Results

from

Deposit Area 1833 - 088 Båsmo

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#

BÅSMO-1 Dump 8880 4360 11 200 7 20.2

BÅSMO-2 Dump 3010 4040 20 89 5 3.0 16.0

BÅSMO-3 Dump 260 89 9 17 9 8.0 377.0

BÅSMO-4 Dump 5590 3170 9 224 11 7.6 90.0

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

Sample No. As* Cd* Ba* Mo* Sn* Sb* Bi* Se* Ga*

BÅSMO-1 118 26.3 -10 34.00 5 -1 7 93.00 2.00

BÅSMO-2 13 10.3 160 10.00 2 -1 2 26.00 10.00

BÅSMO-3 58 .2 10 14.00 -1 -1 6 46.00 -1.00

BÅSMO-4 39 9.9 30 8.00 2 -1 2 70.00 4.00

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

Sample No. Ge* In* Mn* Fe% Te*

BÅSMO-1 1.00 2.00 37 38.10 22.00

BÅSMO-2 -1.00 1.00 864 20.00 6.00

BÅSMO-3 -1.00 -1.00 12 41.20 10.00

BÅSMO-4 -1.00 1.00 374 32.20 8.00

Element/product	Crude ore grade or quality	Reg. date
Cu	.13 %	03.06.1992
S	20 %	03.06.1992
Zn	.14 %	03.06.1992

From - To	Activity	Comments
1894 - 1921	Regular production	Company/Institution :Bossmo Grube
1926 - 1929	Regular production	Company/Institution :2 privatmenn
1932 - 1937	Regular production	Company/Institution :Verkets arbeidere med statsstøtte

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

	Province:	Caledonides
	Geotec.unit:	Rødingsfjell Nappe Complex
	Tectonic complex:	Midtre allokton
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Potassic feldspar	Major mineral (>10%)
Gangue mineral	Plagioclase	Major mineral (>10%)
Gangue mineral	Chlorite	Major mineral (>10%)
Gangue mineral	Garnet	Subordinate mineral (1-10%)
Ore mineral	Pyrite	Major mineral (>10%)
Ore mineral	Chalcopyrite	Accessory mineral (<1%)
Ore mineral	Sphalerite	Accessory mineral (<1%)

Relationship	Rock	Origin
Wall rock	Garnet chlorite schist	Sedimentary Original rock :Greywacke
		Metamorphic facies :Amphibolite

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Unknown	Primary layering	Strike/Dip :90 / 50	Syn-mineralisation ;...Effect :None

	Abstract:
	Arbeidet besto i å bli kjent med sulfidmalmens paragenser i området. Forekomstene er delt inn i tre typer: 1) Båsmo - Malmhaugtypen, 2) Flatli - Sterdaltypen, 3) Malmhaug - Flatli-forekomsten av Bleikvassli-typen, 4) Mosgruben-typen. Dette er en foreløpig rapport for en hovedfagsoppgave.

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
BÅSMO-1	Dump	8880	4360	11	200	7	20.2
BÅSMO-2	Dump	3010	4040	20	89	5	3.0	16.0
BÅSMO-3	Dump	260	89	9	17	9	8.0	377.0
BÅSMO-4	Dump	5590	3170	9	224	11	7.6	90.0

Sample No.	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*	Se*	Ga*
BÅSMO-1	118	26.3	-10	34.00	5	-1	7	93.00	2.00
BÅSMO-2	13	10.3	160	10.00	2	-1	2	26.00	10.00
BÅSMO-3	58	.2	10	14.00	-1	-1	6	46.00	-1.00
BÅSMO-4	39	9.9	30	8.00	2	-1	2	70.00	4.00

Sample No.	Ge*	In*	Mn*	Fe%	Te*
BÅSMO-1	1.00	2.00	37	38.10	22.00
BÅSMO-2	-1.00	1.00	864	20.00	6.00
BÅSMO-3	-1.00	-1.00	12	41.20	10.00
BÅSMO-4	-1.00	1.00	374	32.20	8.00