Seafloor Mapping of the Atlantic Ocean by GMT: Visualizing Mid-Atlantic Ridge Spreading, Sediment Distribution and Tectonic Development

Polina Lemenkova (1)

1 OUC - Ocean University of China

The study presents the insights of the tectonic development and geological settings of the Atlantic Ocean supported by cartographic visualization in Generic Mapping Tools (GMT). The aim is to study geologic situation and trends in the tectonic development of the Mid-Atlantic Ridge and Atlantic Ocean seafloor. The objective is to find out impact of various factors (such as volcanic, tectonic, hydrothermal and sedimentary processes) that sculpt seafloor geomorphology, and correlation between early history of crust formation, geological processes and present submarine landforms. Other assignments in this work refer to mutual comparison of raster grids on sedimentation, topography, geology, seafloor fabric and highlighting similarities among the landforms and sediment thickness. Asymmetry in crustal accretion is explained by the tectonic history of the lithosphere formation. Correlation between plate subduction and development of the submarine landforms is explained by the Earth's crust extension resulting in formation of cracks, elongations, faults, rifts. Ocean seafloor geomorphology is shaped by a variety of factors that impact its form at different scales. These drivers (tectonic evolution, oceanic currents, hydrology, sedimentation) have effects on geomorphic landforms of the seafloor in context of historic geological development and during Quaternary. Technical part of this work was performed by GMT scripting toolset with all maps plotted in American polyconic projection. The results are received by overlay, cartographic analysis and synthesis of the multi-source geodata through mapping and interpreting grids (ETOPO1, EGM96, GlobSed, crustal age). This work contributes to expand the knowledge on geological and tectonic development of the Atlantic Ocean seabed in order to complete the view of its submarine geomorphology

Mots clés: GMT; Geovisualization; Mapping; GMT; Geospatial Data; Atlantic Ocean; Geology

Domaines: Sciences de la Terre; Géomorphologie; Tectonique; Informatique [cs]; Synthèse d'image et réalité virtuelle [cs.GR]; Sciences de l'environnement

Polina Lemenkova. Seafloor Mapping of the Atlantic Ocean by GMT: Visualizing Mid-Atlantic Ridge Spreading, Sediment Distribution and Tectonic Development. Acta Geobalcanica, 2020, 6 (3), pp.145-157. ⟨10.18509/AGB.2020.16⟩. ⟨hal-02963186⟩