TY - JOUR
T1 - Lamprophyric dykes in Revdal, Scoresby Land, East Greenland
T2 - conflicting field observations and K-Ar age determinations
AU - Larsen, Poul-Henrik
AU - Stemmerik, Lars
AU - Nielsen, Troels F.D.
AU - Rex, David C.
PY - 1990
Y1 - 1990
N2 - Field observations on lamprophyric dykes in Revdal, Scoresby Land, suggest a Late Permian age and the dykes would thus represent magmatism related to Permian rifting and basin formation, whereas K-Ar age determinations and chemistry suggest a Tertiary age. It is concluded that the dykes probably are Tertiary and never penetrated Upper Permian sediments due to chilling and fracturing at the base of Upper Permian water rich sediments. The dykes most likely belong to a period of alkaline magmatism that followed the onset of sea floor spreading in this part of the North Atlantic around 55 Ma ago. -Authors
AB - Field observations on lamprophyric dykes in Revdal, Scoresby Land, suggest a Late Permian age and the dykes would thus represent magmatism related to Permian rifting and basin formation, whereas K-Ar age determinations and chemistry suggest a Tertiary age. It is concluded that the dykes probably are Tertiary and never penetrated Upper Permian sediments due to chilling and fracturing at the base of Upper Permian water rich sediments. The dykes most likely belong to a period of alkaline magmatism that followed the onset of sea floor spreading in this part of the North Atlantic around 55 Ma ago. -Authors
UR - http://www.scopus.com/inward/record.url?scp=0025631109&partnerID=8YFLogxK
U2 - 10.37570/bgsd-1990-38-01
DO - 10.37570/bgsd-1990-38-01
M3 - Article
AN - SCOPUS:0025631109
SN - 0011-6297
VL - 38
SP - 1
EP - 9
JO - Bulletin of the Geological Society of Denmark
JF - Bulletin of the Geological Society of Denmark
ER -