Alkali elements in potash feldspar from the pre-Cambrian of Southern Norway
1958; Elsevier BV; Volume: 13; Issue: 4 Linguagem: Inglês
10.1016/0016-7037(58)90031-0
ISSN1872-9533
Autores Tópico(s)Geology and Paleoclimatology Research
ResumoLi, Na, K, Rb, and Cs have been determined in 50 alkali feldspars from the pre-Cambrian of South Norway. The rock types range from gneisses, augengneisses, gneiss granites, granites to aplites and pegmatites. Rubidium enrichment occurs in some diapire (post-orogenic) granites and in some of the large pegmatites from the Telemark formation. Normal K/Rb ratios are found for the large pegmatites from Kragerø and Arendal as well as the gneisses, etc. Enrichment in rubidium was found in all feldspars examined from east of the Oslo fiord.
Referência(s)