Martin Vaz Archipelago

Santos, Anderson Costa dos; Oliveira, André Leite de; Bevilaqua, Leandro A.; Rocha-Júnior, Eduardo R.V.; Rodrigues, Sergio W.O.; Mendes, Júlio Cézar; Jeck, Izabel King

doi:10.1016/b978-0-12-823988-9.00013-7

Cited by 1 publication

(1 citation statement)

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“…Interpretation of High-Resolution Remote Sensing Data for Plio-Pleistocene Tectonic Structures… DOI: http://dx.doi.org/10.5772/intechopen.113254 (5), Jaseur Seamount (6), Colúmbia Bank (7), Davis Bank (8), Asmus Bank (8A), Dogaressa Bank (9), Colúmbia Seamount (10), Palma Seamount (11), and Trindade-Martin Vaz Archipelago. Motoki Hill (12) is at south Colúmbia Seamount (10), which includes Asmus Bank, Palma Seamount, and Motoki Hill [19,[42][43][44][45][46][47][48]. There are controversies about this magmatism, some authors related this magmatism to the Atlantic Ocean break-up in the Lower Jurassic [33,37,39,49], while other researchers (e.g., [19-21, 25, 43, 44, 50-56]) concluded that the alkaline rocks are associated with the Trindade mantle plume.…”

Section: Geological Contextmentioning

confidence: 99%

Interpretation of High-Resolution Remote Sensing Data for Plio-Pleistocene Tectonic Structures Studies in the Trindade Island Volcanic Building, South Atlantic Ocean, Brazil

Motoki,

Campos,

Santos

et al. 2024

Formation and Evolution of Earth's Crust

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Trindade Island (20°31′0’ S and 29°19′0 W) is a large alkaline volcanic edifice and is the only emerging part of the Vitória-Trindade ridge, 1140 km from the Brazilian offshore, whose summit is around 600 meters high. The lineament orientation pattern of Plio-Pleistocene dykes and fracture swarms identified by high-resolution remote sensing allowed identifying the paleo-stresses that acted on Trindade Island. Our research suggests that Trindade Island suffered two distinct tectonic events between 3.6 Ma and 0.25 Ma: the first event is related to the island formation and shows a NW-SE (compressional) and NE-SW (extensional) stress orientation, while the second event shows different stress, namely ENE-WSW (compressional) and NNW-SSE (extensional). These events may also be associated with the opening of the South Atlantic Ocean, during movement and torsion of the South American Plate in the NE-SW direction, evidencing compression toward ENE or due to the influence of the Trindade mantle plume on the South American Plate which generated intraplate stress.

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