Bachelor in Geology from Universidade Federal do Rio Grande do Norte (1995) and PhD in Geophysics from Universidade de São Paulo (1999). He is currently full professor at Universidade de São Paulo, where he acted as Vice-Director (2017-2021) and Director (2021-today). Has experience in Geosciences, focusing on Rock Magnetism, Paleomagnetism and Archeomagnetism. Main research topics are paleoenvironmental changes through Earth's history, particularly the Precambrian-Cambrian boundary, the major biotic crisis in the Phanerozoic and the recent variations of the Earth's magnetic field. He is a full member of the Brazilian Academy of Sciences and The World Academy of Sciences (TWAS). (Source: Lattes Curriculum)
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The Neoproterozoic era, spanning from 720 to 539 million years ago, was marked by profound transformations in all its envelopes and witnessed the emergence and diversification of metazoan life, culminating with the appearance of major animal phyla, in the Cambrian. The Cryogenian period (720-635 Ma) featured extreme glacial epochs and the reemergence of banded iron formations, signaling t…
Scientific drilling projects are an essential element of modern geosciences to access samples and to monitor active processes that cannot be addressed by other means. Each drilling project is planned to target specific and relevant scientific questions and generates hundreds of meters of cylindrical samples of rocks or sediments (cores). These cores need to be appropriately archived in sp…
The total amount of R$ 1.306.944,81, corresponding to the RTI 2019 overhead related to all projects coordinated by researchers from IAG. This year, we prioritized the research laboratories, including the Laboratory of Adaptative Optics and the Meteorological Observatory, under responsibility of IAG, as well as other laboratories from Departaments of Astronomia, Geophysics and Atmospheric …
This project aims to study key Precambrian microbiotas, from different stratigraphies and ages within the Proterozoic of Brazil, using nano-imaging techniques. We plan to analyse both microbialites and microfossils to constrain what kind of biosignatures can provide elemental information such as elements distributions and concentrations with interpretable biological significance to be cor…
This Institutional Technical Reserve (RTI), in the amount of R$1,040,000.00, corresponds to the IAG portion of several projects coordinated by IAG professors. Its use was discussed by the group of professors in the Collegiate and in the three Departments and will contemplate the new CPD, central aspect of the proposal of use of the RTI of the previous year, and urgent needs of general inf…
(Only some records are available in English at this moment)
Paleomagnetic studies of meteorites suggest that during the protoplanetary disk phase, the Solar System was inhabited by strong magnetic fields. These fields were essential for the evolution of the system, redistributing the angular momentum of the disk and contributing to the accretion of matter toward the proto-Sun. Computational models and astronomical observations of protoplanetary sy…
The Ediacaran period (~ 635 - 538 Ma) marked the onset of animal diversification with complex ecological behaviors, the paleooceanographic and atmospheric conditions played a pivotal role in shaping these life forms. Paleoceanographic reconstructions primarily rely on isotopic records, with the resemblance of signals prompting the formulation of global curves. The use of 87Sr/86Sr ratios …
(Only some records are available in English at this moment)
A cornerstone of the continental drift theory and plate tectonics is the geometric similarity between east South American and west African margins. Over the last 60 years, several models have been proposed in order to improve the West Gondwana plate reconstruction. The proposal of lithospheric sub-blocks that may accommodate intraplate deformation in South America and Africa is a solution…
The terrestrial magnetic field presents rapid variations, both in its direction and (declination and slope), and in its intensity. These variations are recorded currently in observatories around the globe and also by satellites. For periods prior to the last two centuries, the investigation of the magnetic field is carried out indirectly, from its record in archaeological materials, sedim…
The onset of modern plate tectonics, involving subduction and mountain uplift, is a key event triggering the emergence of large continental masses and an oxygen-rich atmosphere, setting the stage for the origin of complex life. But when and how plate tectonics started is still unknown owing partially to the inherent difficulty in studying events that occurred in deep time. The paleomagnet…
(Only some records are available in English at this moment)
The Earth's magnetic field varies rapidly in its direction (declination and inclination) and intensity. Currently, global observatories and satellites record these variations. For periods before the last two centuries, the study of directional and magnetic field intensity data is carried out indirectly through records in archaeological materials, sediments, and volcanic rocks. Recently, s…
Paleomagnetism plays a pivotal role in paleogeographic reconstructions, offering valuable insights into Earth's magnetic field evolution. Traditional paleomagnetic methods involve the examination of bulk rock samples. However, recent technological advancements now enable the exploration of magnetic properties at micro and nanoscales, presenting opportunities to refine paleomagnetic interp…
The Earth's magnetic field varies rapidly in its direction (declination and inclination) and intensity. Currently, global observatories and satellites record these variations. For periods before the last two centuries, the study of directional and magnetic field intensity data is carried out indirectly through records in archaeological materials, sediments, and volcanic rocks. Recently, s…
The Neoproterozoic is one of the most critical periods in Earth's history, where great evolutionary leaps took place in the biosphere, marked oscillations in climate and ocean chemistry, and a generalized reorganization in the positioning of continental masses. These processes are generally associated with feedback mechanisms between Earth's Systems (biosphere, climate and tectonics), how…
Although studied from different perspectives, the phenomena responsible for the growth of magnetic particles and acquiring of chemical remanent magnetization (CRM) is not fully understood. Remagnetized carbonate bear exquisite magnetic properties and contradictory domain tests that are still an unsolved scientific problem. Part of the problem relies on the fact that rock magnetism experim…
(Only some records are available in English at this moment)
| 2 / 2 | Ongoing grants |
| 14 / 12 | Completed research grants |
| 6 / 6 | Ongoing scholarships in Brazil |
| 34 / 20 | Completed scholarships in Brazil |
| 2 / 2 | Ongoing scholarships abroad |
| 12 / 11 | Completed scholarships abroad |
| 70 / 53 | All research grants and scholarships |
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CV Lattes
ORCID