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English version | ||||
| INDUSTRIMINERALDATABASEN | |||||
| Forekomstområde 817 - 307 | |||||
| (Sist oppdatert 27.jul.2021) | |||||
Navn på deposit area : Skardsfjellet |
| (Objekt Id : 0817,307,00,00) |
| Forekomstområdet tilhører provinsen : Tørdal pegmatittprovins |
| Lokalisering |
| Fylke : | Telemark (08) | Kommune : | Drangedal (0817) |
| Kart 1:50000: | Nissedal (1613-3) | Kart 1:250000: | Skien |
| Markeringspunkt: | (Unavailable) |
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| Materialtype |
| Hovedtype: | Glimmermineraler | Subtype: | Pegmatittisk muskovitt |
| Betydning |
| Offentlig: | Not Assessed (reg. 18.02.2015) |
| Economical: | Ikke vurdert |
Products |
| Element/product | Crude ore grade or quality | |
| PEGFEL | % |
Operations |
| From - To | Activity | Comments | |
| 1941 - 1943 | Pitting | Skardsfjell ble drevet på amazonitt-feltspat under andre verdens krig. |
Mineralization |
| Era: | Proterozoic | Period: | Neoproterozoic | |
| Dating: | 893 (-9\+9) million year | Method: | U/Pb | |
| Genesis: | Pegmatittdannelse | Form: | ||
| Main texture: | Min. distribution: |
| Main grain size: |
| Strike/Dip: | Direction: | |||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Proterozoic | Period: | Mesoproterozoic |
| Province: | South Norwegian Basement Province | |
| Geotec.unit: | Telemark Supergroup | |
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: |
Bibliography: |
| From NGU's Reference Archive: |
| Segalstad, Tom V.; Eggleston, Ted L. , 1993 |
| Pegmatittene i Tørdal, Telemark. |
| ;TIDSSKRIFTARTIKKEL;Stein; No.20 (3);190-195 pages |
| Bergstøl, S.; Juve, G. , 1988 |
| Scandian ixiolite, pyrochlore and bazzite in granite pegmatite in Tørdal, Telemark, Norway. A contribution to the mineralogy and geochemistry of scandium and tin. |
| ;Springer-Verlag;TIDSSKRIFTARTIKKEL;Mineralogy and petrology; No.38;229-243 pages |
| Abstract: | |
| In Tørdal granite pegmatite veins cut through a volcano-sedimentary sequence which overlies an older, gneissic basement and younger granite from which they originate. Positive co-variations of scandium, lithium, beryllium and tin, which were documented through a recent prospecting program for tin, indicate a possible enrichment of scandium and tin during the passage of pegmatitic material through the volcanic sedimentary sequence. A description is given of scandium-rich ixiolite, (Ta,Nb,Sc,Sn,Fe,Mn,Ti)2O4 in association with pyrochlore, (Ca,Sc,Y,Sn,U)2(Ta,Nb,Ti)2O6(O,OH,F) and bazzite, Be3Sc2Si6O18 from a cleavelandite-amazonite pegmatite occurring as a part of a larger network of granitic pegmatite veins. Alteration from ixiolite to pyrochlore appears as a late magmatic-hydrothermal event. |
| References not to be found in NGU's Reference Archive.: |
| Steffenssen, G., Muller, A., Munnik, F., Friis, H., Erambert, M., Kristofferse, M., Rosing-Schow, N., 2020. Unusual scandium enrichments of the Tordal pegmatites, south Norway. Part I: Garnet as Sc exploration pathfinder. Ore Geology Reviews 126 |
| Segalstad, T.V., Raade, G., 2003. Scandium mineralizations in southern Norway – geological background for the field trip. NGF Abstracts and Proceedings, No 2, p. 57-86. |
| Rosing-Schow, N., 2020. The Sveconorwegian pegmatite province: Identifying the parameters controlling the abundance and genesis of the pegmatites. Dissertation for the degree of Philosophiae Doctor, University of Oslo. |
| Faktaarket ble generert 13.06.2026 |
| Spørsmål eller kommentarer vedrørende faktaarket kan mailes til: ressursdatabaser@ngu.no |
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