Abstract
This report presents the first Rb-Sr age determinations obtained on low-grade metasediments within the eastern part of the North Greenland fold belt. Samples were collected during the 1979 field mapping in eastem Johannes V. Jensen Land, the results ofwhich have been published elsewhere (Soper et al., 1980). Material selected for this study was taken from moderately folded rocks of the Polkorridoren Group and from the northem part of the fold belt where deformation is intense and sedimentary structures are rarely preserved (fig. 23). The principles and methods of isotopic dating of sedimentary rocks applied in this study have been treated in a recent paper by Clauer (1979).
Highlights
This report presents the first Rb-Sr age determinations obtained on low-grade metasediments within the eastern part of the North Greenland fold belt
The principles and methods of isotopic dating of sedimentary rocks applied in this studY have been treated in a recent paper by Clauer (1979)
Dawes & Soper (1979) considered the sedimentary succession to be of mainly Lower Palaeozoic age, probably reaching into the Devonian
Summary
This report presents the first Rb-Sr age determinations obtained on low-grade metasediments within the eastern part of the North Greenland fold belt. Samples were collected during the 1979 field mapping in eastem Johannes V. Jensen Land, the results ofwhich have been published elsewhere (Soper et al, 1980). Material selected for this study was taken from moderately folded rocks of the Polkorridoren Group and from the northem part of the fold belt where deformation is intense and sedimentary structures are rarely preserved The principles and methods of isotopic dating of sedimentary rocks applied in this studY have been treated in a recent paper by Clauer (1979). From the collections made during the 1979 expedition, two localities were selected for the preliminary study reported here From the collections made during the 1979 expedition, two localities were selected for the preliminary study reported here (fig. 23)
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