Open AccessIsotopic age dating in Liverpool Land, East Greenland
Author(s) -
Bent Hansen,
J.D Friderichsen
Publication year - 1987
Publication title -
rapport
Language(s) - English
Resource type - Journals
eISSN - 2597-2944
pISSN - 0418-6559
DOI - 10.34194/rapggu.v134.7988
Subject(s) - migmatite , orogeny , gneiss , geology , geochemistry , metamorphic rock , archaeology , geography , paleontology , tectonics
In Liverpool Land in the eastern part of the Scoresby Sund region gneisses and migmatites were intruded by a number of intermediate plutonites and by younger granites. A number of K-Ar, Rb-Sr and U-Pb isotope age determinations indicate that: 1) the gneisses have a pre-CaIedonian as well as a CaIedonian history, 2) the migmatites were thoroughly reworked during the late part of the Caledonian orogeny, while 3) the plutonic rocks all seem to have been intruded during the Caledonian orogeny.