María Irene Bartolomeu Raposo

Universidade de São Paulo

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Márcia Ernesto

Universidade de São Paulo

Manoel S. D’Agrella-Filho

Universidade de São Paulo

Marcos Egydio‐Silva

Universidade de São Paulo

Alain Vauchez

Université de Montpellier

Valdecir de Assis Janasi

Universidade de São Paulo

Melina C.B. Esteves

Universidade de São Paulo

José Paulo Peccinini Pinese

Universidade Estadual de Londrina

Wilson Teixeira

Universidade de São Paulo

Leila Soares Marques

Universidade de São Paulo

Camila Rocha Tomé

Universidade Federal do Rio Grande do Sul

Cooperative Institutions

Universidade de São Paulo

Instituto de Geociencias

Hospital Universitário da Universidade de São Paulo

Universidade Brasil

Sociedade Brasileira de Geofísica

Centre National de la Recherche Scientifique

Instituto de Geofísica y Astronomía

Universidade de Brasília

Universidade Federal do Rio Grande do Sul

National Council for Scientific and Technological Development

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Emplacement of dike swarms from the island of Ilhabela (SE Brazil) and its relationship with the South Atlantic Ocean opening revealed by magnetic fabrics

Physics of The Earth and Planetary Interiors (2020)

María Irene Bartolomeu Raposo

Dike

Lineation

Rock magnetism

10.1016/j.pepi.2020.106471

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Citations (6)

Emplacement mechanism of the main granite pluton of the Lavras do Sul intrusive complex, South Brazil, determined by magnetic anisotropies

Tectonophysics (2008)

María Irene Bartolomeu Raposo Manuela Gastal

Lineation

Layered intrusion

Outcrop

Rock magnetism

10.1016/j.tecto.2008.10.015

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Citations (44)

Anisotropy of magnetic susceptibility of silicic rocks from quarries in the vicinity of São Marcos, Rio Grande do Sul, South Brazil: Implications for emplacement mechanisms

Journal of Volcanology and Geothermal Research (2017)

Edgardo Cañón‐Tapia María Irene Bartolomeu Raposo

The Paraná-Etendeka Large Igneous Province includes acid volcanic rocks that can be found throughout its extension. Several aspects concerning those rocks remain controversial, including their mechanism of emplacement and location of their eruptive sources. Opening of several quarries of dimension stone near the city of Sao Marcos, Rio Grande do Sul, Brazil, offers a unique opportunity to study in detail the acid products. Here, we present the results of a study of the anisotropy of magnetic susceptibility (AMS) completed in some rocks that had been interpreted as the roots of volcanic conduits. Our results, and reexamination of the textural features of the rocks, lead to a reinterpretation that suggests that these rocks were emplaced subaerially, and involved assimilation and remelting of clastic components of previous products. Due to the inferred conditions of emplacement, it is unlikely that the eruptive vents are located far from the area of study, therefore ruling out the long-travelled nature of these products.

Silicic

Large igneous province

10.1016/j.jvolgeores.2017.07.018

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Citations (12)

Magnetic fabrics and their relationship with the emplacement of the Piracaia pluton, SE Brazil

International Journal of Earth Sciences (2011)

María Irene Bartolomeu Raposo Leonardo Frederico Pressi Valdecir de Assis Janasi

Lineation

Quartz monzonite

Rock magnetism

10.1007/s00531-011-0696-5