Evolution of the southern part of the Canada Basin (Arctic Ocean) based on magnetometric data

Using a new Russian‐American digital grid of anomalous magnetic field of the Arctic Ocean [1], oceanic magnetic anomalies were identified for the whole southern part of the Canada Basin (hereafter, southern CB), extending from the eastern scarp of the Northwind Ridge to the adjacent Banks Island‐Mackenzie Delta continental margin. The geohistorical analysis of magnetic anomalies carried out based on the original procedure [2] revealed regional features of the basin evolution. Contradictory ideas about this evolution were so far based on the geology of continental framing. The presence of spreading-related, fan-shaped magnetic anomalies in the southern CB has been known since the 1970s [3]. However, the strike of anomalies adjoining them has not been established, and the satellite gravitation minimum showed that the extinct spreading center (SC) occurs 75 km eastward of the site assumed by American geophysicists [4]. The available digital grid of the anomalous mag