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|
Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Deposit Area 1833 - 022 | |||||
| (Last updated 02.mar.2005) | |||||
Name of Deposit Area : Loftfjell |
| (Object Id : 1833,022,00,00) |
| Location |
| County : | Nordland (18) | Municipality : | Rana (1833) |
| Map 1:50000: | Mo i Rana (1927-1) | Map 1:250000: | Mo i Rana |
| Marking point: | Longitude: | 14.1696750 | Latitude: | 66.3502500 |
| EU89-UTM Zone 33 | (Coordinates IS confirmed) |
| X-coord: | 462832 m. | Y-coord: | 7359197 m. |
|
|
| Commodity |
| Main Type: | Ferrous metals(Fe, Mn, Ti) | Sub Type: | Iron | |
| Element(s): | Fe |
| Production |
| Activity: | Exploration | Reserves: | ||
| Prod. method: | Production: | |||
| Prod. status: | Volume of dump: |
| Importance |
| Public: | Little Importance (reg. 18.02.2015) |
| Economical: | Minor interest , (Confirmed 02.mar.2005 by Agnes Raaness) |
Products |
| Element/product | Crude ore grade or quality | |
| FE_MAG | 16.2-27 % | |
| FE_SIL | 8.4-5.8 % | |
| P | 0.87-1.3 % |
Operations |
| From - To | Activity | Comments | |
| 1971 - 1973 | Geology | Company/Institution :Rana Gruber (Søvegjarto, M 1:5000) |
Mineralization |
| Era: | Proterozoic | Period: | Neoproterozoic | |
| Dating: | Method: | |||
| 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: | 20 / 15 | Direction: | 90 | |
| Plunge: | 15 |
| 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 | Hornblende | Major mineral (>10%) | |
| Ore mineral | Magnetite | Major mineral (>10%) | |
| Ore mineral | Apatite | Subordinate mineral (1-10%) |
Lithology: |
| Relationship | Rock | Origin | |
| Host rock | Amfibolitt | Extrusive Original rock :Basalt |
|
| Metamorphic facies :Amphibolite | |||
| Wall rock | Granatglimmerskifer | Sedimentary Original rock :Greywacke |
|
| Metamorphic facies :Amphibolite |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Host rock | Foliation | Strike/Dip :20 / 15 | Syn-mineralisation ;...Effect :None | |
| Host rock | Primary layering | Strike/Dip :90 / 15 | Syn-mineralisation ;...Effect :None |
Information(s) in free text format |
| Free text |
| Hovedmalmen ligger i en ca. 700m lang og opptil 10-12m tykk svart hornblende-amfibolitt. Øst for Finnset-hølet er det sett 0,5m tykk malm, og i Kvernbekken-Finnsetbakken 2-5 m tykk magnetittimpregnasjon. En prøve fra hver av disse lokalitetene er analysert ved Norsk Jernverks lab. 1973: Sett tykkelse Fe-tot. Fe-magn. P SiO2 CaO ---------------------------------------------------------------------------------------------- Finnsethølet øst 0,5m 33,1 27,3 1,27 37,1 6,6 Kvernbekk-Finnsetb. 2-5m 24,6 16,2 0,870 42,7 7,3 1,4 km nord for Finnsethølet er horisontenpåtruffet øst for Svarttjønna 289 (bedre 70m SØ for Rundtjønna 350= lite 25m stort tjern i myr) som ca. 1m tykk magnetittimpregnert svart hornblende-amfibolitt. |
Bibliography: |
| From NGU's Reference Archive: |
| Søvegjarto, U.; Marker, M.; Graversen, O. , 1988 |
| Mo i Rana. Berggrunnskart; Mo i Rana; 19271; 1:50 000; trykt i farger; |
| ;Norges geologiske undersøkelse;KART |
Name of Locality : Kvernbekken-Finnsetbakken |
| (Object Id : 1833,022,01,00) |
| Location |
| County : | Nordland (18) | Municipality : | Rana (1833) |
| Map 1:50000: | Storforshei (2027-4) | Map 1:250000: | Mo i Rana |
| Marking point: | Longitude: | 14.1652970 | Latitude: | 66.3475350 |
| EU89-UTM Zone 33 | (Coordinates IS confirmed) |
| X-coord: | 462632 m. | Y-coord: | 7358897 m. |
|
|
| Commodity |
| Main Type: | Ferrous metals(Fe, Mn, Ti) | Sub Type: | Iron | |
| Element(s): | Fe |
| Production |
| Activity: | Exploration | Reserves: | ||
| Prod. method: | Production: | |||
| Prod. status: | Volume of dump: |
Information(s) in free text format |
| Free text |
| Kvernbekk-Finnsetb. ---------------------------- Tykkelse: 2-5m. Fe-total: 24,6%. Fe-magn.: 16,2%. P: 0,870% SiO2: 42,7% CaO: 7,3%. |
Name of Locality : Øst for Svarttjønna |
| (Object Id : 1833,022,02,00) |
| Location |
| County : | Nordland (18) | Municipality : | Rana (1833) |
| Map 1:50000: | Storforshei (2027-4) | Map 1:250000: | Mo i Rana |
| Marking point: | Longitude: | 14.1703780 | Latitude: | 66.3628150 |
| EU89-UTM Zone 33 | (Coordinates IS confirmed) |
| X-coord: | 462882 m. | Y-coord: | 7360597 m. |
|
|
| Commodity |
| Main Type: | Ferrous metals(Fe, Mn, Ti) | Sub Type: | Iron | |
| Element(s): | Fe |
| Production |
| Activity: | Exploration | Reserves: | ||
| Prod. method: | Production: | |||
| Prod. status: | Volume of dump: |
Information(s) in free text format |
| Free text |
| 1,4 km nord for Finnsethølet er horisonten påtruffet øst for Svarttjønna 289 (bedre 70m SØ for Rundtjønna 350: Lite 25m stort tjern i myr) som ca. 1m tykk magnetittimpregnert svart hornblende-amfibolitt. |
| The fact sheet was created on 22.11.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |