Browsing Artikler by Subject "KVARTS"
Now showing items 1-4 of 4
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En forekomst av ren kvarts i Krødsherred
(NGU (103), Journal article, 1922)The paper describes an occurrence of comparatively pure quartz near lake Krøderen in Krødsherad, southern Norway. The quantity of quartz available by quarrying from the surface now exposed to a depth of about 5 m is estimated ... -
Feldspat, kvarts og glimmer, deres forekomst og anvendelse i industrien
(NGU (1), Journal article, 1891)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. ... -
Feltspat IV. Forekomster i Akershus og Østfold øst for Glomma.
(NGU (141), Journal article, 1934)In this publication, which is a sequel to Feltspat II and III by Olaf Andersen and Tom F.W. Barth, brief and exoteric descriptions and some information on production and history are given of about 180 individual feldspar, ... -
Granite pegmatite quartz from Evje-Iveland: trace element chemistry and implications for the formation of high-purity quartz
(NGU Bulletin (436), Journal article, 2000)Previous studies imply that granite pegmatites and hydrothermal quartz veins are the most promising igneous repositories of high-purity quartz. This is because quartz from higher temperature geological settings (granites, ...