Geochemical and Isotopic Signature of a Mesozoic 1000 Km–Long Arcuate Dyke Swarm In NE Brazil

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Authors

Antomat Avelino Macêdo Filho¹ , Maria Helena Hollanda¹

1. USP

Conference / event

2nd INTERNATIONAL CONGRESS ON EARTH SCIENCES IN SE ASIA, November 2019 (Nusa Dua - Bali, Indonesia)

Poster summary

In this work we exposed a preliminary geochemical characterization of the Rio Ceará-Mirim dyke swarm (RCM). This is a giant plumbing system in NE Brazil with ca. 1000 km–long emplaced at the Early Cretaceous age (~130 Ma). The dykes are dominated by high–Ti tholeiites (TiO >2%), followed by low–Ti tholeiites (TiO <2%), rare trachyandesites (SiO >57%) and olivine tholeiites. In this poster we present an integrate characterization of whole–rock geochemistry (major, minor and REE) and Sr–Nd–Pb isotopes of the Rio Ceará–Mirim magmatism.

Keywords

Continental tholeiites, Dike swarms, EQUAMP, West Gondwana

Research areas

Earth Sciences

References

No data provided

Funding

1. FAPESP (No. 2017/13130–0)
2. FAPESP (No. 2017/08423–9)
3. FAPESP (No. 2018/24769–5)
4. CAPES (No. 1643026)

Supplemental files

No data provided

Additional information

Competing interests

No competing interests were disclosed.

Data availability statement

The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.

Creative Commons license

Copyright © 2022 Macêdo Filho et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.