Basalts geodynamics and magnetism of the Knipovich underwater ridge (Norway -- Greenland basin)

Verba, V. V.; Avetisov, G. P.; Sholpo, L. Ye.; Stepanova, T. V.

doi:10.2205/2000es000047

Cited by 4 publications

(1 citation statement)

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“…Наиболее значимы ги-потезы, склоняющиеся к тому, что это не спредин-говый хребет, а сдвиговая трансформная структура с элементами раздвига [Verba et al, 2000;Crane et al, 2001;Gusev, Shkarubo, 2001], что фактически сов-падает с определением структуры типа пулл-апарт. Последняя сформирована в виде цепочки амагма-тических депрессий, разделенных магматическими перешейками с вулканическими постройками цен-трального типа [Crane et al, 2001;Zaraiskaya, 2016].…”

Section: развитияunclassified

New data on the structure of the Knipovich Ridge, North Atlantic

Yampol’sky

2011

Geotecton.

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This article presents the first map showing the vertical amplitudes of modern disjunctive dislocations in Northern 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 structure of the Knipovich 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.

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