Morphogravimetric Characterization of the Eastern and Southern Regions of the Brazilian Continental Shelf

Authors

  • Felipe Pereira Batista Naval College
  • Gregório Luiz Galvão Teixeira Federal University of Espirito Santo
  • Luiz Carlos Torres Universidade Federal Fluminense

Keywords:

Brazilian Continental Margin, Gravimetric anomalies

Abstract

The use of satellites in the acquisition of geophysical variables has allowed the advancement of joint analysis of bathymetry and gravimetry fields in marine regions where these data are scarce or insufficient, which allows a detailed description of the geomorphology and mass distribution of different provinces of a continental margin. In Brazil, although there is a great effort in the execution of marine geophysical surveys by ships, there is a great difficulty in filling some gaps, due to the size of its continental margin. Therefore, this article aims to analyse the joint spatial data of the bathymetric and gravimetric fields (Free-air and Bouguer) of the eastern and southeastern Brazilian marine region from the TOPEX database, using the tools developed in Python computer language. The results obtained were integrated gravimetric and bathymetric profiles, maps correlating such geophysical fields and diagrams that allowed the combined application of quantitative and qualitative statistical methods on the Bathymetric and gravimetric data. Anomalies of 100 mGal were observed along the Brazilian continental margin, with the largest variations recorded along the Vitoria-Trinity Ridge in the order of 200 mGal, and the remarkable correlation between free-air gravity and bathymetry profiles could also be observed.

Author Biographies

Felipe Pereira Batista, Naval College

First Lieutenant Felipe Pereira Batista: Head of the deck Department of the Oceanographic Vessel “Antares”. B.Sc. in Naval Science (Naval College, 2015), he completed the Hydrographic Course IHO/FIG/ICA Category A (Directorated of Hydrography and Navigation – DHN, 2019).

Gregório Luiz Galvão Teixeira, Federal University of Espirito Santo

Gregório Luiz Galvão Teixeira: Assistant Professor of Oceanic Tides and of Geology and Geophysisc on Admiralty Radler de Aquino Instruction and Training Center. He received her master degree in Envromental Engeneering from Federal University of Espirito Santo, in Brazil. His current research interests include morphogravimetric variabilities on Brazil continental margin and estatistical methods to compute chart and tidal datums. He has published papers in national and international journals in oceanography and hydrography areas.

Luiz Carlos Torres, Universidade Federal Fluminense

Luiz Carlos Torres is a retired Capitan that in the last 25 years have had worked on the Brazilian
Continental Shelf Survey Project. Luiz has Master Science formation in Marine Geology and
Geophysics on the Universidade Federal Fluminense concluded in 1997. His current research
interests include continental margins development and surveys related to UNCLOS issues.

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Published

2020-11-30

How to Cite

Batista, F. P., Galvão Teixeira, G. L., & Torres, L. C. (2020). Morphogravimetric Characterization of the Eastern and Southern Regions of the Brazilian Continental Shelf. The International Hydrographic Review, (24), 155–172. Retrieved from https://journals.lib.unb.ca/index.php/ihr/article/view/33153

Issue

No. 24 (2020)

Section

Articles

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