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THE ORE DATABASE
Occurence 1833 - 024 Lamo-malmen
(Object Id: 2293)
(Last updated: 02.03.2005)
Belongs to the Province: Dunderlandsdalen jern
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Storforshei (2027-4) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 479332 m. North: 7365997 m.
Longitude: 14.5371450 Latitude: 66.4127790
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Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

Resources and production
Activity: Exploration Reserves: 1700 thousand tons
Operating method: Historical production:


Products
Element/product Crude ore grade or quality Reg. date
Fe-mag. 15.7 % 28.03.1996
Fe-silicate 5.7 % 28.03.1996
P 0.7 % 28.03.1996

Operations
From - To Activity Comments
1960 - 1960 Geophysics Company/Institution :Geofysisk Malmleting/Rana Gruber
1964 - 1964 Core drilling Company/Institution :Rana Gruber
1966 - 1966 Geophysics Company/Institution :Geofysisk Malmleting/Rana Gruber
1967 - 1967 Geology Company/Institution :Rana Gruber (studenter, M 1:2000)
1982 - 1982 Geology Company/Institution :Rana Gruber (Søvegjarto, M 1:2000)

Mineralization
Era: Proterozoic Period: Neoproterozoic
Genesis: Sedex Form: Layer
Main texture: Banded Min. distribution: Semi-massive (20-50 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration:
Strike/Dip: 105 / 40 Direction: 270
Plunge: 20
Stratigraphic classification of host rock
Era: Proterozoic Period: Neoproterozoic
Province: Caledonides
Geotec.unit: Rødingsfjell Nappe Complex
Tectonic complex: Ramnålidekket
Igneous complex:
Group: Ørtfjellgruppen Formation: Dunderlandformasjonen

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Amphibole Major mineral (>10%)
Gangue mineral Calcite Subordinate mineral (1-10%)
Gangue mineral Chlorite Subordinate mineral (1-10%)
Gangue mineral Biotite Subordinate mineral (1-10%)
Gangue mineral Dolomite Subordinate mineral (1-10%)
Gangue mineral Epidote Accessory mineral (<1%)
Gangue mineral Oligoclase Accessory mineral (<1%)
Gangue mineral Garnet Accessory mineral (<1%)
Ore mineral Magnetite Major mineral (>10%)
Ore mineral Apatite Subordinate mineral (1-10%)
Ore mineral Pyrite Accessory mineral (<1%)

Lithology:
Relationship Rock Origin
Wall rock Karbonatglimmerskifer Sedimentary
Original rock :Argillaceous sediment
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Foliation Strike/Dip :105 / 40 Syn-mineralisation ;...Effect :None
Host rock Primary layering Strike/Dip :270 / 20 Syn-mineralisation ;...Effect :None

Information(s) in free text format
Free text
Lamo-malmen ligger 90m nord for Hullbekkmalmen. Malmblotningene er kun i øst i Lamo-haugen 122 m.o.h., 100m blottet strøklengde i haugens nordhelling og 40m blottet strøklengde i haugens sørhelling. Malmen er gjennomboret av Bh. 240 (UTM 479200 7366100). Nordre malmlag, som er den egentlige Lamo-malmen, går fra Lamohaugen veiskjæring 600m videre vestover. De vestre 360m strøklengde er i det tørrlagte Ørtvann. Malmen er 10-14m bred med fall 40° mot sør. Men i Lamohaugen nordhelling er malmtykkelsen kun 7m med god, finkornet fosfor-rik mt.-hbl.-skifer. Tonnasjeberegning: Lengde Tykkelse Areal Volum 60m ned Tonnasje (spv.3,2) ----------------------------------------------------------------------------------------------------------- Lamo nord 600m 7m 4200m2 252000m3 806 400 tonn Lamo sør 220m 21m 4620m2 277200m3 887 040 tonn -------------------- 1 693 440 tonn Tidligere data for Lamo-malmen er: Malmareal: 12 000m2 Strøklengde: 600m Høyde o.h.: 115m Oppboret malm: 2,0 mill. tonn +antatt malm: 4,0 mill. tonn + mulig malm: 4,0 mill. tonn ------------------------------------------------------- Sum malm ned til nivå 0: 10 mill. tonn Totalt er det diamantboret 1515m i feltet.

Bibliography:
From NGU's Reference Archive:
Søvegjarto, U.; Marker, M.; Gjelle, S. , 1989
Storforshei. Berggrunnskart; Storforshei; 20274; 1:50 000; trykt i farger;
;Norges geologiske undersøkelse;KART

Name of Locality: Østpkt.
(Object Id: 3839 24,01,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Storforshei (2027-4) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 479132 m. North: 7365997 m.
Longitude: 14.5326660 Latitude: 66.4127660
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Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Resources and production
Activity: Exploration Reserves:
Operating method: Historical production:


Name of Locality: Midtpkt.
(Object Id: 3840 24,02,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Storforshei (2027-4) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 478932 m. North: 7366047 m.
Longitude: 14.5281790 Latitude: 66.4132010
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Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Resources and production
Activity: Exploration Reserves:
Operating method: Historical production:


Name of Locality: Vestpkt.
(Object Id: 3841 24,03,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Storforshei (2027-4) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 478682 m. North: 7366097 m.
Longitude: 14.5225710 Latitude: 66.4136330
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Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Resources and production
Activity: Exploration Reserves:
Operating method: Historical production:


Name of Locality: Lamohaugen S-helling
(Object Id: 3842 24,04,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Storforshei (2027-4) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 479332 m. North: 7365947 m.
Longitude: 14.5371530 Latitude: 66.4123310
Show on map
Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Resources and production
Activity: Exploration Reserves:
Operating method: Historical production:


Name of Locality: Bh 240
(Object Id: 6833 24,05,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Storforshei (2027-4) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 479132 m. North: 7365897 m.
Longitude: 14.5326830 Latitude: 66.4118690
Show on map
Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Resources and production
Activity: Exploration Reserves:
Operating method: Historical production:


Information(s) in free text format
Description
Bh 240 har helning 40 grader mot nord. Total lengde er 111,25 m. 3 malmsoner gjennomskjæres: 1. Hullbekkmalmen skjæres mellom 15,82 m og 21,0 m; mektigheten blir altså 5,18 m. 35,5 Fe-tot. 5,5 %. Fe-mag. 0,228 %. P. 2. Lamo-malmen, søndre del skjæres mellom 45,7 m og 67,20 m; altså 21,5 m mektighet. Første 11,3 m viser: 21,1 % Fe-tot. 16,1 % Fe-mag. 0,734 % P. Neste 10,2 m viser: 20,8 % Fe-tot. 14,9 % Fe-mag. 0,626 % P. 3. Lamo-malmen (den egentlige Lamo-malmen) skjæres i to soner mellom 85,8 m og enden på hullet. 1. sone er 6,75 m mektig og viser følgende: 22,7 % Fe-tot. 16,5 % Fe-mag. 0,690 % P. 2. sone er 11,3 m og viser følgende: 16,5 % Fe-tot. 9,3 % Fe-mag. og 0,585 % P.

Name of Locality: Bh 218
(Object Id: 6834 24,06,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Storforshei (2027-4) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 478632 m. North: 7365847 m.
Longitude: 14.5214940 Latitude: 66.4113870
Show on map
Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Resources and production
Activity: Exploration Reserves:
Operating method: Historical production:


Information(s) in free text format
Description
Bh 218 er boret av Bjørkåsen Gruber i 1960, og er på totalt 300,47 m. Retning er NNØ og helning 35 grader. 3 større malmsoner skjæres i hullet: 1. Ørtvannsmalmen mellom 89,85 m og 99,65 m; mektigheten blir 9,8 m. Første 5,15 m viser: 34,6 % Fe-tot. 30,5 % Fe-mag. 0,19 % P. Neste 4,65 m viser: 24,8 % Fe-tot. 16,1 % Fe-mag. 0,13 % P. 2. Hullbekkmalmen mellom 180,68 m og 187,95 m; mektigheten blir 7,27 m. Analysene viser her: 30,1 % Fe-tot. 9,6 % Fe-mag. 0,17 % P. 3. Lamo-malmen mellom 246,08 m og 277,21m; mektigheten blir 31,13 m. Første 8,02 m viser: 21,0 % Fe-tot. 15,5 % Fe-mag. 0,75 % P. Neste 7,60 m viser: 21,6 % Fe-tot. 15,5 % Fe-mag. 0,74 % P. Neste 7,49 m viser: 20,4 % Fe-tot. 13,6 % Fe-mag. 0,71 % P. Neste 8,02 m viser: 18,1 % Fe-tot. 11,6 % Fe-mag. 0,32 % P.

The fact sheet was created on 03.05.2024
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