(Last updated: 31.03.2009)
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Norsk versjon | ||||
| THE INDUSTRIAL MINERAL DATABASE | |||||
| Occurence 5052 - 301 Hundøyrån | |||||
| (Object Id: 7715) (Last updated: 31.03.2009) |
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| Drill Cores: Hundøyrån |
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| Location |
| County: | Trøndelag | Municipality: | Leka (5052) |
| Map 1:50000: | Leka (1725-3) | Map 1:250000: | Vega |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 625620 m. | North: | 7221492 m. |
| Longitude: | 11.6738280 | Latitude: | 65.0931230 |
| Show on map |
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| Resource |
| Resource Type: | Talc | Resource Subtype: | Talc |
| Importance |
| Raw material meaning: | Little Importance (reg. 18.02.2015) |
| Resources and production |
| Activity: | Exploration | Reserves: | ||
| Operating method: | Historical production: |
Operations |
| From - To | Activity | Comments | |
| - 90 | Core drilling | Company/Institution :NGU |
Mineralization |
| Era: | Paleozoic | Period: | Ordovician | |
| Genesis: | Regional metamorphic | Form: | Plate | |
| Main texture: | Vein network | Min. distribution: | Massive (>50 % ore minerals) |
| Main grain size: | Fine grained (< 1 mm) |
| Strike/Dip: | Direction: | |||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Paleozoic | Period: | Ordovician |
| Province: | ||
| Geotec.unit: | ||
| Tectonic complex: | Helgelandsdekket | |
| Igneous complex: |
| Group: | Formation: |
Mineralogy |
| Mineral | Amount | |
| Talc | Major mineral (>10%) | |
| Magnesite | Major mineral (>10%) | |
| Chlorite | Subordinate mineral (1-10%) | |
| Serpentine | Accessory mineral (<1%) |
Information(s) in free text format |
| Free text |
| The deposit is situated on the island of Leka in Nord-Trøndelag within the Leka ophiolite complex (Prestvik 1980). The deposit was investigated by NGU in 1990 in a co-operation between NGU and Norwegian Talc AS. 600 m were drilled in six holes (Olerud 1990). Two large horizontal lenses were detected. The "Upper lens" has an average thickness of 6.6 m and a probable tonnage of 890 000 tonnes. The ore is very fine-grained and consists of talc (~50%), breunnerite (~44%), chlorite (~2-5%) and chromite/ferrite-chromite (~2-3%). The whiteness of milled products is in general < 70%, while smaller areas have whiteness up to around 75%. From Karlsen og Nilsson (2000). |
Bibliography: |
| References not to be found in NGU's Reference Archive.: |
| Karlsen, T.A. og Nilsson, L.P. 2000: Talc deposits in Norway. NGU report 99.135, 103 p. + 41 figures. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | |||
| A9 | Bedrock |
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| C8 | Bedrock |
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| 1a | Core |
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| 1b1 | Core |
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| 1b2 | Core |
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| 1b3 | Core |
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| 1C | Core |
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| 1D | Core |
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| The fact sheet was created on 24.04.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |