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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Deposit Area 911 - 011 | |||||
| (Last updated 24.jun.2015) | |||||
Name of Deposit Area : Fone |
| (Object Id : 0911,011,00,00) |
| Location |
| County : | Aust-Agder (09) | Municipality : | Gjerstad (0911) |
| Map 1:50000: | Gjerstad (1612-1) | Map 1:250000: | Arendal |
| Marking point: | Longitude: | 9.0709900 | Latitude: | 58.8439850 |
| EU89-UTM Zone 32 | (Coordinates IS confirmed) |
| X-coord: | 504096 m. | Y-coord: | 6522682 m. |
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| Commodity |
| Main Type: | Ferrous metals(Fe, Mn, Ti) | Sub Type: | Titanium | |
| Element(s): | Ti Rutile |
| Production |
| Activity: | Mining | Reserves: | ||
| Prod. method: | Underground mining | Production: | ||
| Prod. status: | Disused, closed | Volume of dump: |
| Importance |
| Public: | Little Importance (reg. 02.06.2015) |
| Economical: | Minor interest , (Confirmed 02.jun.2015 by Are Korneliussen) |
Mineralization |
| Era: | Paleozoic | Period: | Devonian | |
| Dating: | Method: | |||
| Genesis: | Form: | |||
| Main texture: | Min. distribution: |
| Main grain size: | Main alteration: |
| Strike/Dip: | Direction: | |||
| Plunge: |
| Ti-deposit type(s) |
| Main type: | Metasomatic | Ilm/Mt-ratio: | ||
| Sub type: | Rutile in amphibolite | %TiO(Ore): | ||
| Titanium province: | Arendal - Bamble | %P2O5(Ore): | ||
| Host rock: | Amphibolite | %MgO(Ilm): | <1 | |
| Main Ti mineral: | Rutile | %V2O3(Mt): | < 0.4 | |
| ppm U (Rutile): |
| Stratigraphic classification of host rock |
| Era: | Paleozoic | Period: | Devonian |
| Province: | South Norwegian Basement Province | |
| Geotec.unit: | Bamble Complex | |
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Albite | Major mineral (>10%) | |
| Gangue mineral | Pyroxene | Subordinate mineral (1-10%) | |
| Gangue mineral | Amphibole | Subordinate mineral (1-10%) | |
| Gangue mineral | Quartz | Subordinate mineral (1-10%) | |
| Ore mineral | Rutile | Subordinate mineral (1-10%) | |
| Ore mineral | Apatite | Subordinate mineral (1-10%) |
Information(s) in free text format |
| Free text |
| Relativt grovkornet rutil opptrer i albittrike årer og i breksjeaktige partier i amfibolitt, i kryssende albittpegmatittiske ganger og i noen tilfeller i kvartsårer. Det er flere røsker og små synker innenfor en avstand på i størrelsesorden 100m, blant annet tre små stoller ved en åpen plass ved en skogsbilvei. Det er mye synlig rutil og apatitt i prøver på tipphaugene, men alt i alt er det lite materiale som er tatt ut. Rutil fra dette området har relativt høyt innhold av uran (42 ppm U, Korneliussen m. fl. 2000), noe som er en ulempe sett fra et industrielt synspunkt. Det foreligger ingen pålitelige data som viser gjennomsnittsgehalter og korresponderende forekomststørrelse. Alt i alt vurderes forekomsten å være uten økonomisk interesse. |
Bibliography: |
| From NGU's Reference Archive: |
| Korneliussen, Are; McEnroe, Suzanne A.; Nilsson, Lars-Petter; Schiellerup, Henrik; Gautneb, Håvard; Meyer, Gurli B.; Størseth, Leif Roger , 2000 |
| An overview of titanium deposits in Norway |
| ;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU Bulletin; No.436;27-38 pages |
| Abstract: | |
| Titanium deposits in Norway are of three major types: igneous, metasomatic and metamorphic. The igneous deposits are compared of ilmenite, magnetite and apatite in various proportions and occur in geological provinces of different ages. and some have a metamorphic overprint. The other majord Ti ore-types is the rutile-bearing eclogites in western Norway that formed during the Caledonian high-pressure metamorphism of predominantly Proterozoic basic igneous rocks. The third Ti ore-Type is the Proterozoic rutile-bearing, scapolitised and albitised rocks in the Bamble region of South Norway. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| KB5A.91 | Bedrock |
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| KB5C.91 | Bedrock |
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| KB5D.91 | Bedrock |
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| KB5G.91 | Bedrock |
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| KB5H.91 | Bedrock |
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| KB5I.91 | Bedrock |
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| 262.21 | Bedrock |
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| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 911 - 011 Fone |
Oxide analyses |
( All values are in % ) |
| Sample No. | Sample Type | SiO2 | Al2O3 | TiO2 | Fe2O3 | MnO | MgO | CaO |
| KB5A.91 | Bedrock | 45.43 | 15.61 | 1.78 | 12.27 | 0.03 | 8.07 | 7.52 |
| KB5C.91 | Bedrock | 62.96 | 19.92 | 2.32 | 0.45 | 0.01 | 0.32 | 3.06 |
| KB5D.91 | Bedrock | 71.93 | 13.96 | 0.39 | 2.67 | 0.05 | 0.53 | 1.32 |
| KB5G.91 | Bedrock | 53.48 | 5.50 | 4.82 | 4.85 | 0.03 | 10.55 | 14.68 |
| KB5H.91 | Bedrock | 64.17 | 18.68 | 3.04 | 0.31 | 0.01 | 0.27 | 1.41 |
| KB5I.91 | Bedrock | 73.68 | 13.62 | 0.24 | 1.94 | 0.04 | 0.43 | 1.42 |
| 262.21 | Bedrock | 58.21 | 11.20 | 2.41 | 10.13 | 0.10 | 2.70 | 5.91 |
| ------------------ |
| Sample No. | Na2O | K2O | P2O5 | Sum | |||||
| KB5A.91 | 6.01 | 0.69 | 0.24 | 98.00 | |||||
| KB5C.91 | 9.33 | 1.05 | 0.04 | 99.00 | |||||
| KB5D.91 | 6.21 | 2.68 | 0.09 | 100.00 | |||||
| KB5G.91 | 3.71 | 0.11 | 0.09 | 98.00 | |||||
| KB5H.91 | 10.65 | 0.25 | 0.14 | 99.00 | |||||
| KB5I.91 | 3.64 | 4.66 | 0.06 | 100.00 | |||||
| 262.21 | 1.21 | 2.12 | 0.07 | 94.00 |
| The fact sheet was created on 15.05.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |