Seminarium fizyki litosfery i planetologii

Ellesmere Island, in Canada’s Arctic, consists of a series of ~SW-NE trending tectonic provinces, the crustal structure and geological expression of which represent a combination of interplate, accretionary orogenesis in the Palaeozoic (Caledonian equivalent and Ellesmerian orogenies) and intraplate orogenesis in the Cenozoic (Eurekan Orogeny). The present-day topography of Ellesmere Island is closely related to the crustal architecture of these tectonic provinces, which includes the contiguous continental margin of the Arctic Ocean. An almost complete absence of information about the onshore crustal or lithosphere structure in the area has recently been addressed by the acquisition of teleseismic data between 2010 and 2012 on a passive seismological array called ELLITE (“Ellesmere Island Teleseismic Experiment”). The disposition of the Moho as well as number of intra-crustal horizons across Ellesmere Island have been inferred from a Receiver Function analysis of the ELLITE data and these are integrated with surface geological observations to produce a single, combined two-dimensional crustal model of the intraplate Eurekan Orogen.