Renan Pedrosa Orengel da Rocha

@geoquimica-uff.com.br

Geoscience (Geochemistry) graduate program of the Federal Fluminense University
Geoscience (Geochemistry) graduate program of the Federal Fluminense University

Renan Pedrosa Orengel da Rocha


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https://researchid.co/renanpedrosa

RESEARCH, TEACHING, or OTHER INTERESTS

Nuclear and High Energy Physics, Multidisciplinary, Earth and Planetary Sciences, Education
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Scopus Publications

Scopus Publications

  • Methodological tests using Amazonian soil samples for 14C-AMS dating
    Renata M Jou, Kita D Macario, Luiz C Pessenda, Fabiana B Gomes, Fabiana M Oliveira, Renan Pedrosa, Eduardo Q Alves, Stewart Fallon, Leonardo J C Santos, Vanderlei Maniesi, Alexis S Bastos
    Radiocarbon, 2026
    Although radiocarbon-accelerator mass spectrometry (14C-AMS) is an important tool for the establishment of soil chronology, its application is challenging due to the complex nature of soil samples. In the present study, chemical extraction methodologies were tested to obtain the most representative age of Amazonian soil deposition by 14C-AMS. We performed acid hydrolysis with different numbers of extractions, as well as treatments combining acid and bases and quartered and non-quartered samples. The ages of the soil organic matter (SOM) fractions were compared to the ages of naturally buried charcoal samples at similar depths. The results showed that the age of the non-hydrolyzable inert fraction of soil was closer to the age of charcoal and older than the ages of humin. It was also observed that the quartering process can influence the results, since the dating of the humin fraction showed variability in the results. Our results are important to provide information about the most suitable method for the 14C-AMS dating of soil samples for paleoenvironment reconstruction studies.
  • The use of carbon isotopes (13C,14C) in different soil types and vegetation coverage in a montane atlantic forest region, Southeast Brazil
    Renata M. Jou, Kita D. Macario, Luiz C. Pessenda, Marcos Gervasio Pereira, Flávio L. Lorente, Renan Pedrosa, Eduardo Carvalho da Silva Neto, Stewart Fallon, Marcelo C. Muniz, Renan P. Cardoso, João P.S. Felizardo, Roberto M. dos Anjos
    Quaternary Geochronology, 2021