Open AccessStoping versus ductile deformation in the emplacement of the rapakivi intrusion of Qemertoq, South Greenland
Author(s) -
M Susanne,
Becker Brown,
P. E. Brown
Publication year - 1985
Publication title -
bulletin of the geological society of denmark
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.674
H-Index - 28
eISSN - 2245-7070
pISSN - 0011-6297
DOI - 10.37570/bgsd-1984-33-29
Subject(s) - geology , intrusion , metamorphic rock , subsidence , stoping , deformation (meteorology) , magma , geochemistry , ductility (earth science) , seismology , mining engineering , geomorphology , materials science , oceanography , creep , structural basin , volcano , composite material
Subsidence of Ketilidian metamorphic rocks adjacent to mushroomshaped intrusions of rapakivi granite in South Greenland has been described by Bridgwater et al. (1974) and compared to the theoretical predictions of Ramberg (1967). Observations on the island of Qemertoq show that where the rapakivi magma rose through massive granite rather than schistose country rocks sloping was a major factor. This difference in intrusive mechanisms can be attributed to ductility contrasts in the different types of country rock.