Fission track age determinations of rocks from north Greenland ...

• Main Authors: Grist, Alexander M, Zentilli, Marcos
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2011
• Subjects: Geological sample; Nares_Strait_Geocruise; Sampling on land; Arctic Archipelago; Canadian Arctic Archipelago; Ellesmere Island; Greenland; Nares strait; North Greenland; Rawlings Bay
• Online Access: https://dx.doi.org/10.1594/pangaea.756511; https://doi.pangaea.de/10.1594/PANGAEA.756511

Apatite fission track (FT) ages and length characteristics of samples obtained from Cambrian to Paleocene-aged sandstones collected along the margin of Nares Strait in Ellesmere Island in the Canadian Arctic Archipelago are dominated by a thermal history related to Paleogene relative plate movements between Greenland and Ellesmere Island. A preliminary inverse FT thermal model for a Cambrian (Archer Fiord Formation) sandstone in the hanging wall of the Rawlings Bay thrust at Cape Lawrence is consistent with Paleocene exhumational cooling, likely as a result of erosion of the thrust. This suggests that thrusting at Cape Lawrence occurred prior to the onset of Eocene compression, likely due to transpression during earlier strikeslip along the strait. Models for samples from volcaniclastic sandstones of the Late Paleocene Pavy Formation (from Cape Back and near Pavy River), and a sandstone from the Late Paleocene Mount Lawson Formation (at Split Lake, near Makinson Inlet) are also consistent with minor burial ... : Supplement to: Grist, Alexander M; Zentilli, Marcos (2006): Preliminary apatite fission track thermal history modelling of the Nares Strait Region of eastern Ellesmere Island and northwestern Greenland. Polarforschung, 74(1-3), 113-127 ...