Sampling of metadolerites in the Agto area, central West Greenland

Abstract

During field work in the Agto area in 1966 to 1969 (see GGU Reports of Activities for these years), a number of metadolerites were mapped and sporadically sampled. In the country around Agto settlement where the metadolerites are apparently most frequent, they have been used in the synthesis of a structural chronology (Sørensen, 1970). A preliminary petrographic analysis of all metadolerite samples collected by the mapping team (Sørensen, 1971), revealed that the metadolerites, which range modallyfrom amphibolite to pyriclasite, offered ideal possibilities for describing and interpreting aspects of the amphibolite to granulite facies transition.