dc.contributor.author | Friis, Jacob P. | |
dc.coverage.spatial | 19131 Sarpsborg | |
dc.coverage.spatial | 16123 Nelaug | |
dc.coverage.spatial | 16122 Tvedestrand | |
dc.coverage.spatial | 17124 Kragerø | |
dc.coverage.spatial | ARENDAL | |
dc.coverage.spatial | TVEDESTRAND | |
dc.coverage.spatial | KRAGERØ | |
dc.coverage.spatial | VIKEN | |
dc.coverage.spatial | AGDER | |
dc.coverage.spatial | TELEMARK | |
dc.date.accessioned | 2020-08-26T12:32:41Z | |
dc.date.available | 2020-08-26T12:32:41Z | |
dc.date.issued | 1891 | |
dc.identifier.uri | https://hdl.handle.net/11250/2674454 | |
dc.description.abstract | Forkortet: The above minerals are extracted from very coarse grained granitic veins - pegmatite - in the Archaean of the Southern Norway. The author describes several quarries between the cities of Arendal and Tvedestrand. The Holt mine is worked to a depth of 25 m in a vein 2 to 7 m thick and striking 24 m from E to W. The Fjeld mine, known amongst mineralogists for its thorite, is a quarry 60 to 70 m long, 15 to 16 m broad and 9 m deep. Several thousand barrels of pure feldspar are extracted here. Famous for their rare minerals are the Garta and the Narestø mines. On of the most remarkable veins is the Kalstad- vein in the neighbourhood of the town of Kragerø. This pegmatitic mass and its broadest 17 m and has a length of 40 m. | |
dc.language.iso | nor | |
dc.relation.ispartofseries | NGU (1) | |
dc.rights | Navngivelse 4.0 Internasjonal | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | |
dc.subject | GLIMMER | |
dc.subject | FELTSPAT | |
dc.subject | MINERALOGI | |
dc.subject | BERGGRUNNSGEOLOGI | |
dc.subject | KVARTS | |
dc.subject | GRUVE | |
dc.title | Feldspat, kvarts og glimmer, deres forekomst og anvendelse i industrien | |
dc.type | Journal article | |
dc.description.localcode | 36244 | |
dc.source.pagenumber | 50-69 | |