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Structure of the magnetic layer of the axial part of the mid-Atlantic ridge between the Charlie-Gibbs and the maxwell transform faultsстатья
- Авторы: Palshin N.A., Ivanenko A.N., Peyve A.A., Merkuriev S.A.
- Журнал: Marine Geophysical Researches
- Том: 46
- Номер: 4
- Год издания: 2025
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Первая страница: 10
- Последняя страница: 1007
- DOI: 10.1007/s11001-025-09565-8
- Аннотация: We analyzed new multibeam bathymetry and magnetic data covering the axial part of the Mid-Atlantic ridge and its flanks with crustal ages ranging from 0 to 4–8 Ma between the Charlie-Gibbs and the Maxwell transform faults. The study area is characterized by significant heterogeneity along spreading axis. Linear magnetic anomalies were identified and traced. The full-spreading rate of 22 mm/yr has remained nearly constant since at least 6 Ma, but crustal accretion has beeneither symmetrical or asymmetrical, reaching a 20% degree of asymmetry. Geochronological information in the study area is provided by both basalts and, especially in amagmatic areas, by exhumed gabbros and serpentinized peridotites, but estimates of the crustal age based on linear anomalies which were identified in amagmatic zones could contain some uncertainty. A three-dimensional model of the magnetic layer makes it possible to outline several domains with differentmagnetic layer structure and zones with an anomalous pattern of magnetization. These zones correspond to the amagmatic areas where gabbros and peridotites were dredged, and the existence of oceanic core complexes is assumed. Two-dimensional models of magnetic layer for the selected profiles were constructed. Some specific features of the magnetic layer structure in amagmatic areas were revealed: the proposed oceanic core complexes correspond to areas with upliftedbottom and are characterized by low values of effective magnetization, and blocks with increased thickness of magnetic layer exist on flanks.
- Добавил в систему: Меркурьев Сергей Александрович