The origins of amphibolites occurring in high grade metamorphic gneisses on Langøy, North Norway, are discussed in light of results of a general survey recently published by Walker et al. (1960). Mainly on the basis of some trace element data it is possible to separate between two groups of the amphibolites. It is likely that this separation reflects a difference in origin.
The possible origins of amphibolites in an area of high metamorphic grade.