(Last updated: 13.02.2024)
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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Occurence 4227 - 029 Ørnehommen | |||||
| (Object Id: 5078) (Last updated: 13.02.2024) |
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| Location |
| County: | Agder | Municipality: | Kvinesdal (4227) |
| Map 1:50000: | Fjotland (1412-3) | Map 1:250000: | Mandal |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 387923 m. | North: | 6505700 m. |
| Longitude: | 7.0671360 | Latitude: | 58.6769840 |
| Show on map |
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| Resource |
| Resource Type: | Ferroalloys (Cr,Ni,Co,V,Mo,W) | Resource Subtype: | Molybdenium | |
| Element(s): | Mo |
| Importance |
| Raw material meaning: | Not Assessed (reg. 18.02.2015) |
| Resources and production |
| Activity: | Test mining | Reserves: | ||
| Operating method: | Underground mining | Historical production: | 6,5 thousand tons |
Operations |
| From - To | Activity | Comments | |
| 1915 - 1919 | Test mining | Company/Institution :A/S Ørnehommens molybdengruber |
Mineralization |
| Era: | Proterozoic | Period: | Mesoproterozoic | |
| Genesis: | Hydrothermal vein | Form: | ||
| Main texture: | Structureless | Min. distribution: | Irregular (scattered) |
| Main grain size: | Coarse grained (> 3 mm) | Main alteration: |
| Strike/Dip: | Direction: | |||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Proterozoic | Period: | Mesoproterozoic |
| Province: | South Norwegian Basement Province | |
| Geotec.unit: | Agder Complex | |
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Gangue mineral | Biotite | Subordinate mineral (1-10%) | |
| Gangue mineral | Feldspar | Subordinate mineral (1-10%) | |
| Ore mineral | Molybdenite | Major mineral (>10%) |
Lithology: |
| Relationship | Rock | Origin | |
| Host rock | Granite | Intrusive Original rock :Granite |
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| Metamorphic facies :Amphibolite |
Information(s) in free text format |
| Free text |
| Ørnehommen er en av de større gruvene i Knabenområdet og arbeidene består av flere stoller på ulike nivå (Bugge 1963). En av stollene skjærer malmsonen i Jelå-mineraliseringene. Området ble undersøkt og selskapet A/S Ørnehommens molybdengruber ble dannet i 1915. Produksjon startet året etter og fram til 1919 ble det produsert 6651 t malm med 0,2-0,23 % MoS2 som ble sendt til vaskeriet. Dette ga vel 13 t konsentrat med 70-75 % MoS2 (Holmsen 1961). Grovkornet molybdenglans mineralisering finnes i tynne pegmatittiske kvartsårer i porfyrisk granitt og disseminert i grå, kvartsrik granitt (Müller m.fl. 2015) |
Name of Locality: Ørnehommen |
| (Object Id: 38440 29,01,00) |
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| Location |
| County: | Agder | Municipality: | Kvinesdal (4227) |
| Map 1:50000: | Fjotland (1412-3) | Map 1:250000: | Mandal |
| County: | (Unavailable) |
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| Resource |
| Resource Type: | Ferroalloys (Cr,Ni,Co,V,Mo,W) | Resource Subtype: | Molybdenium | |
| Element(s): | Mo |
| Resources and production |
| Activity: | Test mining | Reserves: | ||
| Operating method: | Underground mining | Historical production: |
| The fact sheet was created on 08.05.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |