TY - JOUR
T1 - Kronprins Christian Land Orogeny deformational styles of the end Cretaceous transpressional mobile belt in Eastern North Greenland
AU - Schack-Pedersen, Stig A.
AU - Håkansson, Eckart
PY - 1999
Y1 - 1999
N2 - In Kronprins Christian Land the end-Cretaceous Kronprins Christian Land Orogeny constitutes a fairly narrow, NW-SE oriented transpressional zone of deformation characterized by a high-intensity axis with diverging thrust displacement and a rapid, symmetric drop in deformational intensity and - probably - thermal alteration away from the axis. Strike-slip dominated deformation is centered along a system of prominent, reactivated along-axis faults, whereas compressional structural elements dominate in the areas between the main faults. The two axial tectono-stratigraphic terranes represent, respectively, the north and south verging flanks of a major flower structure. The Kilen Terrane exposes upper stockwerk level deformation characterized by oblique, en échelon domal folds with minor reverse faults and late, small-scale tear faults. The Ingeborg Terrane exposes deformation from a lower stockwerk level characterized by thrust fault ramp-and-flats, thrust fault folding, as well as by zones of chaotic cataclastic breccias. Vertical separation between the two levels is approximately 3 km; in spite of this, localized high-pressure zones in the lower level have reached greenschist facies metamorphic grades.
AB - In Kronprins Christian Land the end-Cretaceous Kronprins Christian Land Orogeny constitutes a fairly narrow, NW-SE oriented transpressional zone of deformation characterized by a high-intensity axis with diverging thrust displacement and a rapid, symmetric drop in deformational intensity and - probably - thermal alteration away from the axis. Strike-slip dominated deformation is centered along a system of prominent, reactivated along-axis faults, whereas compressional structural elements dominate in the areas between the main faults. The two axial tectono-stratigraphic terranes represent, respectively, the north and south verging flanks of a major flower structure. The Kilen Terrane exposes upper stockwerk level deformation characterized by oblique, en échelon domal folds with minor reverse faults and late, small-scale tear faults. The Ingeborg Terrane exposes deformation from a lower stockwerk level characterized by thrust fault ramp-and-flats, thrust fault folding, as well as by zones of chaotic cataclastic breccias. Vertical separation between the two levels is approximately 3 km; in spite of this, localized high-pressure zones in the lower level have reached greenschist facies metamorphic grades.
KW - Geotectonics
KW - Arctic
UR - http://www.scopus.com/inward/record.url?scp=0039130920&partnerID=8YFLogxK
U2 - 10.2312/polarforschung.69.117
DO - 10.2312/polarforschung.69.117
M3 - Article
AN - SCOPUS:0039130920
SN - 0032-2490
VL - 69
SP - 117
EP - 130
JO - Polarforschung
JF - Polarforschung
IS - 1-3
ER -