AMPLITUDES OF DISJUNCTIVE DISLOCATIONS IN THE KNIPOVICH RIDGE FLANKS (NORTHERN ATLANTIC) AS AN INDICATOR OF MODERN REGIONAL GEODYNAMICS

AMPLITUDES OF DISJUNCTIVE DISLOCATIONS IN THE KNIPOVICH RIDGE FLANKS (NORTHERN ATLANTIC) AS AN INDICATOR OF MODERN REGIONAL GEODYNAMICS

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This article presents the first map showing the vertical amplitudes of modern disjunctive dislocations inNorthern Atlantic, based on the estimated phase shifts of reflected waves recorded by high-frequency seismic acoustic surveys.The amplitude distribution pattern is mosaic with alternating areas of compression and extension in the flanks of the Knipovich rift system.The modern Magnetic Strip structure of the Knipovich Handlebar Assembly Ridge, including two strike-slip faults, represents a local rift in the pull-apart setting.

The asymmetry of stresses and the presence of compression in the ridge flanks is evidenced by the distribution of the focal mechanisms of strong earthquakes related to reverse faults.In the southeastern Knipovich Ridge, tectonic activity is marked by the asymmetric pattern of the epicenters of small earthquakes.