Open AccessOn some pre-Cambrian metadolerites from the central Ivigtut region SW Greenland
Author(s) -
E Bondesen,
N Henriksen
Publication year - 1965
Publication title -
bulletin
Language(s) - English
Resource type - Journals
eISSN - 2597-2936
pISSN - 0105-3507
DOI - 10.34194/bullggu.v52.6586
Subject(s) - greenschist , geology , gneiss , metamorphic facies , metamorphic rock , geochemistry , shear zone , consolidation (business) , shear (geology) , facies , petrology , geomorphology , paleontology , tectonics , business , accounting , structural basin
After their consolidation, the Ketilidian gneisses were transversed by several generations of tensional, doleritic dykes-the Kuánitic dykes. During a later episode (the Sánerutian) these dykes were metamorphosed to varying degrees of alteration which increase in the described area from west to east. Along a specific metadolerite, which can be traced approx. 40 km, the metamorphic grade changes from greenschist to amphibolite facies. In the western parts static conditions and in the eastern parts dynamic conditions, prevailed during the alteration. Sánerutian shear zones in the eastern parts depict the dynamic conditions found here.