Significance of Northeast‐Trending Features in Canada Basin, Arctic Ocean Geochemistry, Geophysics, Geosystems

Synthesis of seismic velocity, potential field, and geological data from Canada Basin and its sur- rounding continental margins suggests that a northeast-trending structural fabric has influenced the origin,evolution, and current tectonics of the basin. This structural fabric has a crustal origin, based on the persis- tence of these trends in upward continuation of total magnetic intensity data and vertical derivative analysis of free-air gravity data. Three subparallel northeast-trending features are described. Northwind Escarpment,bounding the east side of the Chukchi Borderland, extends /C24600 km and separates continental crust of Northwind Ridge from high-velocity transitional crust in Canada Basin. A second, shorter northeast-trending zone extends /C24300 km in northern Canada Basin and separates inferred continental crust of Sever Spur from magmatically intruded crust of the High Arctic Large Igneous Province. A third northeast-trending fea-