Goudarzi, Mohammad Ali

mohammad-ali.goudarzi.1@ulaval.ca



Cycle : 3e
Directeur : Marc Cocard
Codirecteur : Rock Santerre

Sujet : GPS-inferred velocity and strain rate fields in eastern Canada


Résumé :

Earth’s crust and uppermost mantle are made by some pieces, so called “tectonics plates”, which are categorized as primary and secondary tectonics plates. The North American plate, among them, is a primary tectonic plate covering most of North America, Greenland, Cuba, Bahamas, and parts of Siberia and Iceland. It extends eastward to the Mid-Atlantic Ridge and westward to the Chersky Range in eastern Siberia. For the most parts, this tectonics plate moves in roughly a south west direction away from the Mid-Atlantic Ridge.
Among three techniques of tracking tectonics plates (i.e., satellite observations, sea-floor magnetization and paleopoles), the most robust and convenient way to measure plate tectonic motions is provided by GNSS observations. It is specially useful in the case of Permanent GNSS network were installed on places close to plate boundaries.
The Canadian Base Network can serve as a monitoring network for deformation studies of the Canadian landmass. The array of stations have an average spacing of 200 km in the built-up areas of southern Canada, 500 km in the middle regions of Canada, and 1,000 km in the northern areas. This network as well as other local permanent GPS networks provide a good platform to study the microplate tectonics of Eastern Canada. More specifically the following objectives have been considered to be studied:
– Increasing accuracy and better analysis of GNSS results.
– Determination of velocity, deformation and strain fields.
– Comparison and validation of results from GNSS observations with geological and geophysical observations.

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