Fact Sheet for <b>Occurence 1806 - 006 Jernhammeren</b>

					Norsk versjon
	THE ORE DATABASE
	Occurence 1806 - 006 Jernhammeren
	(Object Id: 2432) (Last updated: 07.02.2024)

Location

County:

Nordland

Municipality:

Narvik (1806)

Map 1:50000:

Evenes (1331-4)

Map 1:250000:

Narvik

Coordinate system:

EU89-UTM Zone 33

East:

568829 m.

North:

7584692 m.

Longitude:

16.6731520

Latitude:

68.3667870

Show on map

Resource

	Resource Type:	Ferrous metals(Fe, Mn, Ti)	Resource Subtype:	Iron
			Element(s):	Fe

Importance

Raw material meaning:

Little Importance (reg. 18.02.2015)

Resources and production

	Activity:	Pitting	Reserves:
	Operating method:		Historical production:

Products

Element/product Crude ore grade or quality Reg. date

Fe ca.30 % 01.02.1999

Fe-mag. ca. 18 % 01.02.1999

Mn ac. 1 % 01.02.1999

Operations

From - To Activity Comments

1899 - 1906 Pitting Company/Institution :A/S Håfjellets jernmalmfelter

1935 - 1945 Geology Company/Institution :NGU

1976 - 1977 Geology Company/Institution :Rana Gruver A/S

Mineralization

Genesis: Sedimentary deposit Form: Layer

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

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

Strike/Dip: 300 / 20 Direction: 40

Plunge: 30

Stratigraphic classification of host rock

Era: Period:

Province: Caledonides

Geotec.unit: Ofoten Nappe Complex

Tectonic complex: Upper allochton

Igneous complex:

Group: Salangen Group Formation: Håfjellet iron formation

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Garnet Subordinate mineral (1-10%)

Gangue mineral Epidote Subordinate mineral (1-10%)

Gangue mineral Calcite Subordinate mineral (1-10%)

Gangue mineral Apatite Subordinate mineral (1-10%)

Gangue mineral Amphibole Subordinate mineral (1-10%)

Ore mineral Magnetite Major mineral (>10%)

Ore mineral Hematite Major mineral (>10%)

Lithology:

Relationship Rock Origin

Host rock Quartz mica schist Sedimentary
Original rock :Marl

Wall rock calcite marble Sedimentary
Original rock :Limestone

Wall rock (calcite)- mica schist Sedimentary
Original rock :Marl

Metamorphic facies :Amphibolite

Structures

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

Wall rock Primary layering Strike/Dip :300 / 20 Syn-mineralisation ;...Effect :None

Wall rock Fold axis Dir./Plunge :40 / 30 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Håfjellets jernformasjon ved Fuglevatnet er sterkt foldet i kjernen av Håfjellsmulden. Det er en del av jernformasjonen som kan følges fra Hestvikåsen over Toppåsen - Heia og Vassåsen i den Sv sjenkel av mulden. Jernhammeren er det vestligste av feltene ved Fuglevatnet og er undersøkt rundt århundreskiftet med røsker og skjerp i et antall av ca. 30 røsker. Foslie (1949) har kartlagt og beskrevet området på en god måte. Røsker over Jernhammerens tykkeste mineralisering ble prøvetatt i 1992 av Lindahl og Sørdal. Malmsonen består av flere rikere lag med mineralisering, hvor henholsvis hematitt og grovkornet magnetitt dominerer. I en av grøftene ble det funnet relativt mye kis, svovelkis og litt kobbrkis.

Bibliography:

From NGU's Reference Archive:

Foslie, Steinar , 1949

Håfjellsmulden i Ofoten og dens sedimentære jern-mangan-malmer. Søndre Ofotens malmforekomster II.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.174;1-129 + f pages

Abstract:

The sedimentary hematite-magnetite ores of marine origin, occurring within the crystalline mica schists of the caledonian mountain of Northern Norway, belong to a characteristic type of iron ore deposits, internationally known as the Dunderland ore type. Such deposits are known from latitude 65 degrees 20' to 69 degrees 40' N, thus covering a distance along the mountain chain of about 550 km. Transversely to this direction, they are known for at most 90 km, but generally much less. It is significant, that they do not occur farther southwards along the mountain chain, nor in its eastern part. The reason seems to be, taht they are connected with the so-called western development or the mountain chain formations, which disappear below the ocean in the Trondheim district. Compared with the eastern development, it is characterized by greater thickness of the sedimentary series, a far more considerable part of crystalline limestones and - so faar as now known - absence of the basic lavas (greenstone formation), which are important in the east and south. It belongs to a more central part of the geosyncline. The southern and greater part of the ore-bearing district is so strongly folded, that it has been difficult to establish the stratigraphic relation between the different deposits or their proper place within the formations.

Fieldsamples

Sample No. Sample type Miscellanrous

NO0290.01 Bedrock

Sampler: Lindahl, I./...Stored: Løkken

Comment: Iron ore, magnetite dominated.

No. of registrated element analyses = 1

NO0290.02 Bedrock

Sampler: Lindahl, I./...Stored: Løkken

Comment: Banded magnetite ore. A few pyrite crystals.

No. of registrated element analyses = 1

N-19 Bedrock

Sampler: Bjerkgård/Raaness/...Stored: Løkken

Comment: magnetite with manganese bands

No. of registrated oxide analyses = 1

N-20 Bedrock

Sampler: Bjerkgård/Raaness/...Stored: Løkken

Comment: quartz-banded magnetite

No. of registrated oxide analyses = 1

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

Name of Locality: Jernhammeren vest

(Object Id: 39469 6,01,00)

Location

County: Nordland Municipality: Narvik (1806)

Map 1:50000: Evenes (1331-4) Map 1:250000: Narvik

Coordinate system: EU89-UTM Zone 33

East: 569092 m. North: 7584622 m.

Longitude: 16.6794950 Latitude: 68.3660950

Show on map

Resource

Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron

Element(s): Fe

Fieldsamples

Sample No. Sample type Miscellanrous

N-21 Bedrock

Sampler: Bjerkgård/Raaness/...Stored: Løkken

Comment: manganese-rich breccia

No. of registrated oxide analyses = 1

N-22 Bedrock

Sampler: Bjerkgård/Raaness/...Stored: Løkken

Comment: manganese-magnetite

No. of registrated oxide analyses = 1

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

Analyse Results

from

Deposit Area 1806 - 006 Jernhammeren

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#

NO0290.01 Bedrock 1 56 2 107 93 .5 1.0

NO0290.02 Bedrock 5 44 2 16 7 .1 1.0

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

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

NO0290.01 3.0 3.0 2 .6 2 1.00 2 2 .01

NO0290.02 3.0 3.0 2 .4 19 1.00 2 2 .04

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

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

NO0290.01 32 15 11227 21.51 3.00 5.00 1 81.0 10.00

NO0290.02 37 17 822 21.83 3.00 5.00 1 35.0 16.00

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

Sample No. B*

NO0290.01 2

NO0290.02 5

Oxide analyses
( All values are in % )

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

N-19 Bedrock 32.96 3.61 0.28 51.87 4.21 1.28 3.98

N-20 Bedrock 42.42 3.84 0.32 42.44 0.05 2.78 5.80

N-21 Bedrock 45.25 7.54 0.88 9.77 14.95 3.20 8.80

N-22 Bedrock 36.05 4.58 0.30 40.59 10.01 1.74 3.84

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

Sample No. Na2O K2O P2O5 Loss Sum

N-19 -0.01 0.02 0.41 1.65 100.00

N-20 0.41 0.39 2.17 -0.74 100.00

N-21 -0.01 -0.01 0.15 8.95 99.00

N-22 -0.01 -0.01 0.39 2.10 100.00

Element/product	Crude ore grade or quality	Reg. date
Fe	ca.30 %	01.02.1999
Fe-mag.	ca. 18 %	01.02.1999
Mn	ac. 1 %	01.02.1999

From - To	Activity	Comments
1899 - 1906	Pitting	Company/Institution :A/S Håfjellets jernmalmfelter
1935 - 1945	Geology	Company/Institution :NGU
1976 - 1977	Geology	Company/Institution :Rana Gruver A/S

	Genesis:	Sedimentary deposit	Form:	Layer
	Main texture:	Banded	Min. distribution:	Semi-massive (20-50 % ore minerals)

	Province:	Caledonides
	Geotec.unit:	Ofoten Nappe Complex
	Tectonic complex:	Upper allochton
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Garnet	Subordinate mineral (1-10%)
Gangue mineral	Epidote	Subordinate mineral (1-10%)
Gangue mineral	Calcite	Subordinate mineral (1-10%)
Gangue mineral	Apatite	Subordinate mineral (1-10%)
Gangue mineral	Amphibole	Subordinate mineral (1-10%)
Ore mineral	Magnetite	Major mineral (>10%)
Ore mineral	Hematite	Major mineral (>10%)

Relationship	Rock	Origin
Host rock	Quartz mica schist	Sedimentary Original rock :Marl
Wall rock	calcite marble	Sedimentary Original rock :Limestone
Wall rock	(calcite)- mica schist	Sedimentary Original rock :Marl
		Metamorphic facies :Amphibolite

Location:	Type:	Orientation(360 gr.):	Relation to min.:
Wall rock	Primary layering	Strike/Dip :300 / 20	Syn-mineralisation ;...Effect :None
Wall rock	Fold axis	Dir./Plunge :40 / 30	Post-mineralisation ;...Effect :Modifies

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
NO0290.01	Bedrock	1	56	2	107	93	.5	1.0
NO0290.02	Bedrock	5	44	2	16	7	.1	1.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
NO0290.01	3.0	3.0	2	.6	2	1.00	2	2	.01
NO0290.02	3.0	3.0	2	.4	19	1.00	2	2	.04

Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
NO0290.01	32	15	11227	21.51	3.00	5.00	1	81.0	10.00
NO0290.02	37	17	822	21.83	3.00	5.00	1	35.0	16.00

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
N-19	Bedrock	32.96	3.61	0.28	51.87	4.21	1.28	3.98
N-20	Bedrock	42.42	3.84	0.32	42.44	0.05	2.78	5.80
N-21	Bedrock	45.25	7.54	0.88	9.77	14.95	3.20	8.80
N-22	Bedrock	36.05	4.58	0.30	40.59	10.01	1.74	3.84

Sample No.	Na2O	K2O	P2O5	Loss	Sum
N-19	-0.01	0.02	0.41	1.65	100.00
N-20	0.41	0.39	2.17	-0.74	100.00
N-21	-0.01	-0.01	0.15	8.95	99.00
N-22	-0.01	-0.01	0.39	2.10	100.00