Graduated in Geology from the Federal University of Rio de Janeiro (1988), holds a Master’s degree in Geology from the same university (1992), and a Ph.D. in Geology from the University of São Paulo (1999). Has experience in Geosciences, with an emphasis on Sedimentaty Geology.
Contamination by Potentially Toxic Elements (PTEs) in Agricultural Products Grown Around Sepetiba Bay, Rio de Janeiro State (SE Brazil) Graziele Arantes Reis, Maria Virginia Alves Martins, Lisia Maria Gobbo Santos, Santos Alves Vicentine Neto, Fernando Barbosa Junior, et al. Archives of Environmental Contamination and Toxicology, 2025 The contamination of soil, water, and air by potentially toxic elements (PTEs) allows the transfer of metals to food. When introduced into food through soil, PTEs are absorbed by plant roots and transported to the bloodstream. The region surrounding Sepetiba Bay (SB), a densely populated area intensively exploited for tourist purposes, is one of the most contaminated by PTEs in the southeastern region of Brazil. Therefore, this study aims to evaluate (by ICP-MS) the concentrations of PTEs in agricultural products (roots, fruits, leaves, seeds, cheese, and eggs) cultivated and sold by rural producers in the region surrounding SB. The 26 food types selected for this study were produced in this region and purchased at local markets. The results for the analyzed foods revealed relatively high concentrations of Zn > Cu > Ni > Cr > As > Pb > Co > Hg > Cd, exceeding the limits established by ANVISA and international laws. Cluster analysis (CA) and principal component analysis (PCA) grouped the PTEs according to their possible sources: ore transport (Zn, Cu, Pb, and Cd), natural (Hg, Cr, and Ni), and fertilizers (Co and As). The CA allowed us to distinguish two main food groups in terms of the enrichment of PTEs. Group 1 contains leaves, animal products, and seeds with higher levels of Hg, Cr, Ni, Co, and As. Group 2 includes roots and fruits, which have higher concentrations of Zn, Cu, Pb, and Cd than Group 1. The Hazard Quotient (HQ) suggests that As and Cr pose a higher risk in foods of CA-Group 1 (leaves, animal products, and seeds). Hazard Index (HI) values > 1 indicate a risk of probable long-term carcinogenesis in adults. Thus, this study reveals that the continued consumption of food produced in the region surrounding SB could cause health problems for the local population.
Benefits of integrating seismic and gravity data in a subsalt environment: A case study at block BM-C-33, deepwater Campos Basin, offshore Brazil Karine L. Cardozo, Sergio Bergamashi, Paulo T. L. Menezes, Marcelo S. Salomão Interpretation, 2025 Imaging subsalt layers is challenging in the BM-C-33 block in the Campos Basin’s ultradeep waters. This block is important because it has three significant gas and condensate discoveries in the presalt carbonate and volcanic reservoirs—Seat, Gávea, and Pão de Açucar. Understanding basement morphology is essential to better define the petroleum system in the area. To that end, we performed a 2D gravity modeling exercise along a northwest–southeast section using seismic interpretation as input to reduce the ambiguity of the modeling exercise. To achieve this, we fixed the main sedimentary horizons and their densities (calculated via well-log information) to better estimate the top of the basement morphology. This interpretation strategy better delineated the presalt sedimentary section and the complex structural framework with two asymmetric grabens bounded by a prominent horst, interpreted as a migration focusing high in the BM-C-33 area. In addition, our findings show that obtaining clear images remains challenging even after extensive processing of the seismic data set. We suggest that seismic node acquisition with ultralong offsets and multiazimuthal illumination and then carefully processing the data is required to accurately reveal the area’s prerift section and basement morphology under study.
Earliest Evidence of Land Plants in Brazil Philippe Gerrienne, Hermínio de Araújo-Júnior, Sérgio Bergamaschi, Ingrid Milagres, Gustavo de Oliveira Martins, et al. Brazilian Paleofloras from Paleozoic to Holocene, 2024
Transfer of industrial contaminants from the inner to the outer region of Sepetiba Bay (SE Brazil) by dredge spoil dumping activities: a temporal record Murilo Barros Saibro, Maria Virgínia Alves Martins, Josefa Varela Guerra, Rubens Cesar Lopes Figueira, Felipe de Castro Figueiredo Simões, et al. Environmental Earth Sciences, 2023 A multiproxy approach involving grain size, geophysical (resistivity, magnetic susceptibility, and P-wave velocity), mineralogical (XRD), and geochemical (elemental, stable isotopes) data has been applied to core SP9 (128 cm long) to reconstruct natural and anthropogenic changes since ≈1850 AD (anno domine) (dating by 210Pb and 127Cs methods) in a distal region of Sepetiba Bay (SB), Rio de Janeiro State (SE Brazil). The analyzed core is a fine-grained sedimentary sequence (except its upper 20 cm). It comprises detrital particles derived from felsic and intermediate source rocks, as suggested by the fields defined by the biplot Zr vs TiO2 and the Al2O3/TiO2 ratios. Despite the increase in particle size at the top of the core, there was a progressive increase in the organic matter and potentially toxic elements (PTEs) contents and nutrients such as N and P. The geophysical data allowed us to identify the presence of subsurface (biogenic) gas, which suggests the occurrence of eutrophication processes in the study area despite its location in the outer region of the bay. Core SP9 records cyclical changes over the last ≈170 years in the mineralogical and elemental composition of the sediments and type of organic matter supplied to the bottom. These changes are associated with phases of more significant oceanic influence, salinity variations in the study area, and greater or lesser oxygen depletion in the sediment. These changes may have resulted from climatic oscillations or variations in the configuration and extension of the Ponta da Pombeba spit. The extent of this structure and the anthropic activities have contributed to the contamination of this area since 1975 AD. However, statistical analyses (Pearson correlations and principal components analysis) suggest that the transport and accumulation of PTEs (mainly Cd and Zn) did not strictly follow the general pattern of sedimentary dynamics prevailing in the studied area. Results indicate that this area became strongly polluted by Cd and Zn and with high ecological risk due to dredging and spoil disposal activities at sites close to the study area. It is noted that the environmental degradation reached higher levels here than in areas close to the primary source of the metals, the disabled Ingá Mercantil Company, in Madeira Island. This work demonstrates the temporal effect of dredge disposal activities in a distal region of Sepetiba Bay for the first time. It is a strong indicator that dredged spoil areas must be selected carefully, since healthy areas can become degraded due to the dumping of polluted waste.
A HIGH-RESOLUTION SUBTLE FAULT MAPPING IN MARLIM FIELD, BRAZIL Leonardo Campos João, Paulo de Tarso L. Menezes, Sergio Bergamaschi Revista Brasileira De Geofisica, 2023 Discriminating geological discontinuities is important for reservoir management because they influence storage capacity and fluid flow. Structural heterogeneities, such as faults and fractures, significantly impact the compartmentalization of the reservoir’s facies and affect the flow of hydrocarbons. These structures can act as the pore space for fluid storage, flow-control conduits, or barriers that allow the accumulation of exploitable volumes of oil and gas. Understanding these structures’ spatial and temporal development can significantly impact hydrocarbon exploration. Reservoir characterization is a critical process in the oil and gas industry that aims to comprehensively understand reservoir rocks and their fluid content and distribution. It is a multidisciplinary approach that combines geological, geophysical, and engineering datasets through statistical and deterministic mathematical models. Seismic datasets play a crucial role in reservoir characterization. Interpreters can use seismic data processing and imaging to interpret geological horizons and map faults, building complex geological models. Seismic inversion is also employed to estimate acoustic impedance and other petrophysical properties. Faults and fractures mapping are highly relevant themes in reservoir characterization. Identifying subtle faults and fractures is essential in specifying hydrocarbon migration paths and identifying bypassed oil accumulations. However, traditional seismic amplitude data interpretation should consider these structures more. In this study, we apply a high-resolution fault mapping workflow to map the subtle faults system at the Marlim field in the offshore portion of the Campos Basin. As an outcome, we imaged two separate fault trends inside and outside the Marlim reservoir.
STRATIGRAPHIC FRAMEWORK AND POTENTIAL HYDROCARBON-GENERATING HORIZONS AT DEVONIAN SECTION FROM THE SOUTHWESTERN BOUNDARY, PARNAÍBA BASIN, TOCANTINS, BRAZIL Geociencias, 2022
Estudo Preliminar da Tafoflora da Formação Furnas, Bacia do Paraná, Brasil Anais Da Academia Brasileira De Ciencias, 1996
RECENT SCHOLAR PUBLICATIONS
Magma-induced thermal alteration in Devonian organic-rich rocks (Paraná Basin, Brazil): molecular transformations and clay-catalyzed maturation LPH Bastos, R Rodrigues, CLF Alferes, DBN da Silva, ... Organic Geochemistry 210, 105083 , 2025 2025 Citations: 2
Contamination by Potentially Toxic Elements (PTEs) in Agricultural Products Grown Around Sepetiba Bay, Rio de Janeiro State (SE Brazil) GA Reis, MV Alves Martins, LMG Santos, SAV Neto, FB Junior, ... Archives of Environmental Contamination and Toxicology 89 (2), 195-220 , 2025 2025 Citations: 9
Changes in the sedimentation and oxygen depletion during the Heinrich stadials 4 and 5 in a distal region of the NW Iberian Margin LC Da Silva, MVA Martins, DR García, AB Tello, PÁ Iglesias, DL Terroso, ... Quaternary International 739, 109869 , 2025 2025
Assessment of potential ecological risk by metals in Ilha Grande Bay (Southeast Brazil) FL Damasceno, MVA Martins, LGC Santos, JG Mendonça Filho, ... Marine Pollution Bulletin 212, 117612 , 2025 2025 Citations: 5
Earliest evidence of land plants in Brazil P Gerrienne, H de Araújo-Júnior, S Bergamaschi, I Milagres, ... Brazilian Paleofloras: From Paleozoic to Holocene, 87-124 , 2024 2024 Citations: 8
Petrographic and Petrophysical Characterization of Sandstones from Rio Bonito Formation, Paraná Basin (Southern Brazil) PFO Ramos, GC Stael, RBV Azeredo, MVB Ade, S Bergamaschi, ... Anais da Academia Brasileira de Ciências 96 (4), e20240365 , 2024 2024 Citations: 2
RESULTADO DA SELEÇÃO INTERNA PDSE 2026 HI de Araújo Júnior, S Bergamaschi, LP Belfort UNIVERSIDADE DO ESTADO DO RIO DE JANEIRO , 2024 2024
Transfer of industrial contaminants from the inner to the outer region of Sepetiba Bay (SE Brazil) by dredge spoil dumping activities: a temporal record MB Saibro, MVA Martins, JV Guerra, RCL Figueira, ... Environmental Earth Sciences 82 (23), 560 , 2023 2023 Citations: 11
Multi-scale characterization from the Hard Cap, Mupe Member, Lower Purbeck Limestone Group, Wessex Basin, Dorset, UK RC Baptista, S Bergamaschi, MVB Ade, AS Machado, OMO de Araújo, ... Journal of Sedimentary Environments 8 (3), 363-387 , 2023 2023
Advances in chemical stratigraphy of Pimenteiras Formation, devonian of Parnaíba Basin, Brazil LP Martins, M Brito, HA Portela, R Rodrigues, S Bergamaschi, ... Journal of South American Earth Sciences 118, 103912 , 2022 2022 Citations: 3
Organic geochemical evidence for the transition of Aptian-Albian hypersaline environments into marine restricted seas: The South Atlantic oceanic northern gateway and its … LPH Bastos, EA Jagniecki, WH dos Santos, D da Costa Cavalcante, ... Marine and Petroleum Geology 140, 105632 , 2022 2022 Citations: 24
ANÁLISE ESTRATIGRÁFICA E POTENCIAIS HORIZONTES GERADORES DE HIDROCARBONETOS EM UMA SEÇÃO DEVONIANA NA BORDA SUDOESTE DA BACIA DO PARNAÍBA, TOCANTINS, BRASIL: Stratigraphic … R da Silva Lessa, S Bergamaschi, R Rodrigues, HM Monteiro, ... Geosciences= Geociências 41 (1), 89-103 , 2022 2022 Citations: 1
Trace metals enrichment and potential ecological risk in sediments of the Sepetiba Bay (Rio de Janeiro, SE Brazil) LC Da Silva, MVA Martins, WFL Castelo, MB Saibro, D Rangel, E Pereira, ... Marine pollution bulletin 177, 113485 , 2022 2022 Citations: 31
Bioaccumulation of potentially toxic elements in Ammonia tepida (foraminifera) from a polluted coastal area WFL Castelo, MVA Martins, M Martínez-Colón, LC da Silva, C Menezes, ... Journal of South American Earth Sciences 115, 103741 , 2022 2022 Citations: 9
Unraveling Anthropocene Paleoenvironmental conditions combining sediment and foraminiferal data: proof-of-concept in the Sepetiba Bay (SE, Brazil) LC Silva, MV Alves Martins, R Figueira, F Frontalini, E Pereira, ... Frontiers in Ecology and Evolution 10, 852439 , 2022 2022 Citations: 16
Disentangling natural vs. anthropogenic induced environmental variability during the Holocene: Marambaia Cove, SW sector of the Sepetiba Bay (SE Brazil) WFL Castelo, MVA Martins, M Martínez-Colón, JV Guerra, TP Dadalto, ... Environmental Science and Pollution Research 28 (18), 22612-22640 , 2021 2021 Citations: 35
Long-term eutrophication and contamination of the central area of Sepetiba Bay (SW Brazil) WFL Castelo, MVA Martins, PA de Lima Ferreira, R Figueira, CF Da Costa, ... Environmental Monitoring and Assessment 193 (2), 100 , 2021 2021 Citations: 37
The birth and demise of the vast epicontinental Permian Irati-Whitehill sea: Evidence from organic geochemistry, geochronology, and paleogeography LPH Bastos, R Rodrigues, E Pereira, S Bergamaschi, CLF Alferes, ... Palaeogeography, Palaeoclimatology, Palaeoecology 562, 110103 , 2021 2021 Citations: 45
Anthropic influence in Sepetiba Bay: SP5 testimony study (SE Brazil) LC Silva, A Martins, E Pereira, S Bergamaschi, MAC Rodrigues, ... Proceedings of the 50. Brazilian congress on geology. Geology and society … , 2021 2021
Palynology and geochemistry of the Frasnian global transgression in the Parnaiba Basin, Brazil P Steemans, E Pereira, A Le Hérissé, Y Grahn, M Streel, M Brito, ... Review of Palaeobotany and Palynology 284, 104345 , 2021 2021 Citations: 11
MOST CITED SCHOLAR PUBLICATIONS
Palynology and sequence stratigraphy of three Devonian rock units in the Apucarana Sub-basin (Paraná Basin, south Brazil): additional data and correlation Y Grahn, PM Mauller, S Bergamaschi, EP Bosetti Review of Palaeobotany and Palynology 198, 27-44 , 2013 2013 Citations: 156
Silurian and Lower Devonian chitinozoan biostratigraphy of the Paraná Basin in Brazil and Paraguay Y Grahn, E Pereira, S Bergamaschi Palynology 24 (1), 147-176 , 2000 2000 Citations: 134
Análise estratigráfica do Siluro-Devoniano (formações Furnas e Ponta Grossa) da sub-bacia de Apucarana, bacia do Paraná, Brasil S Bergamaschi Universidade de São Paulo , 1999 1999 Citations: 106
An Early Devonian flora, including Cooksonia, from the Paraná Basin (Brazil) P Gerrienne, S Bergamaschi, E Pereira, MAC Rodrigues, P Steemans Review of Palaeobotany and Palynology 116 (1-2), 19-38 , 2001 2001 Citations: 105
Caracterização de seqüências deposicionais de 3ª ordem para o Siluro-Devoniano na Sub-bacia de Apucarana, Bacia do Paraná, Brasil S Bergamaschi, E Pereira Ciência-Técnica-Petróleo 20, 63-72 , 2001 2001 Citations: 83
An exceptional specimen of the early land plant Cooksonia paranensis, and a hypothesis on the life cycle of the earliest eutracheophytes P Gerrienne, DL Dilcher, S Bergamaschi, I Milagres, E Pereira, ... Review of Palaeobotany and Palynology 142 (3-4), 123-130 , 2006 2006 Citations: 73
The Furnas/Ponta Grossa contact and the age of the lowermost Ponta Grossa Formation in the Apucarana Sub-basin (Paraná Basin, Brazil): integrated palynological age determination Y Grahn, P Mendlowicz Mauller, P Breuer, EP Bosetti, S Bergamaschi, ... Revista Brasileira de Paleontologia 13 (2), 89-102 , 2010 2010 Citations: 69
Middle and Upper Devonian chitinozoan biostratigraphy of the Paraná Basin in Brazil and Paraguay Y Grahn, E Pereira, S Bergamaschi Palynology 26 (1), 135-165 , 2002 2002 Citations: 64
Evolução das sinéclises paleozoicas: províncias Solimões, Amazonas, Parnaíba e Paraná E Pereira, CDR Carneiro, S Bergamaschi, FFM Almeida Geologia do Brasil 1, 374-394 , 2012 2012 Citations: 55
Ecological quality status of the NE sector of the Guanabara Bay (Brazil): A case of living benthic foraminiferal resilience MVA Martins, J Hohenegger, M Martínez-Colón, F Frontalini, ... Marine Pollution Bulletin 158, 111449 , 2020 2020 Citations: 49
The birth and demise of the vast epicontinental Permian Irati-Whitehill sea: Evidence from organic geochemistry, geochronology, and paleogeography LPH Bastos, R Rodrigues, E Pereira, S Bergamaschi, CLF Alferes, ... Palaeogeography, Palaeoclimatology, Palaeoecology 562, 110103 , 2021 2021 Citations: 45
Biochemical composition and foraminiferal content of sediments for determining bottom sector environments in Guanabara Bay (Rio de Janeiro, Brazil) IMMM Clemente, FS Da Silva, LLM Laut, F Frontalini, VL Da Costa, ... Journal of Coastal Research 31 (5), 1190-1204 , 2015 2015 Citations: 40
Long-term eutrophication and contamination of the central area of Sepetiba Bay (SW Brazil) WFL Castelo, MVA Martins, PA de Lima Ferreira, R Figueira, CF Da Costa, ... Environmental Monitoring and Assessment 193 (2), 100 , 2021 2021 Citations: 37
Disentangling natural vs. anthropogenic induced environmental variability during the Holocene: Marambaia Cove, SW sector of the Sepetiba Bay (SE Brazil) WFL Castelo, MVA Martins, M Martínez-Colón, JV Guerra, TP Dadalto, ... Environmental Science and Pollution Research 28 (18), 22612-22640 , 2021 2021 Citations: 35
Characterization of the assistência member, Irati formation, Paraná basin, Brazil: organic matter and mineralogy W Holanda, S Bergamaschi, AC dos Santos, R Rodrigues, LC Bertolino Journal of Sedimentary Environments, 36-45 , 2018 2018 Citations: 35
Oil generation potential assessment and paleoenvironmental interpretation of Irati Formation (Lower Permian) in northwestern of Paraná Basin (Brazil) R dos Santos Euzébio, DES dos Reis, MAR de Castro, S Bergamaschi, ... Journal of Sedimentary Environments, 254-267 , 2016 2016 Citations: 34
Trace metals enrichment and potential ecological risk in sediments of the Sepetiba Bay (Rio de Janeiro, SE Brazil) LC Da Silva, MVA Martins, WFL Castelo, MB Saibro, D Rangel, E Pereira, ... Marine pollution bulletin 177, 113485 , 2022 2022 Citations: 31
Análise sedimentológica da Formação Furnas na faixa de afloramentos do flanco norte do arco estrutural de Ponta Grossa, Bacia do Paraná, Brasil S Bergamaschi Anuário do Instituto de Geociências 16, 140-140 , 1993 1993 Citations: 29
Estudo preliminar da tafoflora da Formação Furnas, bacia do Paraná, Brasil D Mussa, L Borghi, S Bergamaschi, G Schubert, E Pereira, ... Anais da Academia Brasileira de ciências 68 (1), 65-90 , 1996 1996 Citations: 27
Organic geochemical evidence for the transition of Aptian-Albian hypersaline environments into marine restricted seas: The South Atlantic oceanic northern gateway and its … LPH Bastos, EA Jagniecki, WH dos Santos, D da Costa Cavalcante, ... Marine and Petroleum Geology 140, 105632 , 2022 2022 Citations: 24