Abstract
During the period August 6-18 the writer, assisted by C. Wewer, worked on Ubekendt Ejland. From the base camp at the mouth of Tuperssuartûta kûa three areas were covered and Wewer later collected in the fourth from the GGU ship "K. J. V. Steenstrup".
Highlights
During the period August 6-18 the writer, assisted by C
Three hundred samples were collected in the field with a view to doing subsequent chemical work
The objectives of this proposed work were twofold, (a) to better understand the history of magmatic evolution in the West Greenland Tertiary lava province, and (b) to establish how far the linear increase in incompatibie trace elements could be traced in the evolved rocks for the purpose of establishing the stratigraphic position of samples dredged offshore
Summary
During the period August 6-18 the writer, assisted by C. The pyroclastics tend to be acid in composition and consist largely of fresh or devitrified glass fragments, occasional xenoliths, crystal fragments of kaolinized potash feldspar, quartz and veins and patches of carbonate. These tuffs are overlain by approximately 200 m of relatively thin flows of feldspar-phyric basalt, with minor olivine basalts and tuffaceous horlzons. The pyroc1astics end at Nftk takisoq and the rest of the coast to Erqua consists of altered olivine basalts in which the olivines have been pseudomorphed by serpentine, iddingsite and carbonate, minor acid flows and frequent thin pyroclastic horizons. The few acid flows in Tuperssuartftta kfta do not appear to continue along strike down to the south coast
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