Contributions to understand the Atlantic opening from Paleomagnetism

Authors

  • Marcia Ernesto Universidade de São Paulo.

Keywords:

South Atlantic, Paleomagnetism, Reconstructions, Apparent polar wander path

Abstract

Paleomagnetism is an essential tool to determine and quantify the displacement and rotations of conti-nental blocks. It is also facilitates the accurate tracing of the South Atlantic opening history considering that the long (~40 Ma) Cretaceous Normal Superchron quiet period makes it difficult to determine well dated rotation poles based on sea floor magnetic anomalies. To achieve this reliable apparent polar wander paths (APWP) for South America and Africa, traced back to the pre-drift stage, are required. A well calibrated APWP along with magnetostratigraphy information is also useful to discriminate “pulses” of igneous activity within the magmatic province that preceded or accompanied the Atlantic evolution.

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Published

2009-11-01

Issue

Vol. 17 No. 2 (2009)

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

This license enables reusers to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. The license allows for commercial use.

How to Cite

ERNESTO, Marcia. Contributions to understand the Atlantic opening from Paleomagnetism. Boletim de Geociências da Petrobras, Rio de Janeiro, v. 17, n. 2, p. 353–363, 2009. Disponível em: https://bgp.petrobras.com.br/bgp/article/view/130. Acesso em: 10 mar. 2025.