Norsk versjon | |||||
THE INDUSTRIAL MINERAL DATABASE | |||||
Deposit Area 817 - 305 | |||||
(Last updated 28.jul.2021) |
Name of Deposit Area : Heftetjern |
(Object Id : 0817,305,00,00) |
The deposit area belongs to the Province : Tørdal pegmatittprovins |
Location |
County : | Telemark (08) | Municipality : | Drangedal (0817) |
Map 1:50000: | Nissedal (1613-3) | Map 1:250000: | Skien |
Marking point: | Longitude: | 8.7466800 | Latitude: | 59.1822300 |
EU89-UTM Zone 32 | (Coordinates IS confirmed) |
X-coord: | 485523 m. | Y-coord: | 6560371 m. |
|
Commodity |
Main Type: | Feldspar | Sub Type: | Pegmatitic feldspar |
Importance |
Public: | Not Assessed (reg. 18.02.2015) |
Economical: | Not classified/evaluated |
Operations |
From - To | Activity | Comments | |
2011 - 2012 | Detail mapping | ||
2011 - 2012 | Sampling | ||
2012 - 2012 | Geochemistry | Company/Institution :Scandium International Mining Corp. |
Mineralization |
Era: | Period: | |||
Dating: | Method: | |||
Genesis: | 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: |
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. |
Segalstad, Tom V.; Eggleston, Ted L. , 1993 |
Pegmatittene i Tørdal, Telemark. |
;TIDSSKRIFTARTIKKEL;Stein; No.20 (3);190-195 pages |
Oftedal, Ivar , 1943 |
Lepidolit- og tinnsteinførende pegmatitt i Tørdal, Telemark |
;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.22 (1-2);1-14 pages |
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. |
The fact sheet was created on 27.04.2024 |
Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
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