Sr-isotopic studies and mineral composition of the Hagen Bræ Member in the Proterozoic clastic sediments at Hagen Bræ, eastern North Greenland

Abstract

During the field season of 1978, siltstones from the Hagen Bræ Member of the Proterozoic Independence Fjord Group were sampled for isotopic dating by John Collinson (Collinson, this report). The samples were collected from the north side of Hagen Bræ along two profiles separated by approximately 800 m (Collinson, 1979 and this report, fig. 8, locality B). The total thickness of the siltstones from the unconformity below the siltstone beds to the feldspathic sandstone above is approximately 40 m. The samples appear to represent the lower third of the member.