Mauro César Geraldes

Universidade do Estado do Rio de Janeiro

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Anderson Costa dos Santos

Universidade do Estado do Rio de Janeiro

Wilson Teixeira

Universidade de São Paulo

Maria Virgínia Alves Martins

Universidade do Estado do Rio de Janeiro

Cecilia Pavón Pivetta

Centro Científico Tecnológico - Bahía Blanca

Leonardo Benedini

Universidad Nacional del Sur

Daniel A. Gregori

Universidad Nacional del Sur

Armando Dias Tavares

Universidade do Estado do Rio de Janeiro

Leonardo Strazzere

Universidad Nacional del Sur

Paulo Marcos

Consejo Nacional de Investigaciones Científicas y Técnicas

Guilherme Loriato Potratz

Universidade do Estado do Rio de Janeiro

Cooperative Institutions

Universidade do Estado do Rio de Janeiro

143

Instituto de Geociencias

Universidade Federal do Rio de Janeiro

Universidade de São Paulo

Universidade Federal de Mato Grosso

Universidade Federal Fluminense

Universidade Federal do Rio Grande do Sul

National Council for Scientific and Technological Development

Centre National de la Recherche Scientifique

Consejo Nacional de Investigaciones Científicas y Técnicas

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Detrital zircon grains analyzed for U-Pb ages for sedimentary provenance studies: Tectonic- driven deposition of the Resende Basin (Eocene-Oligocene) in SE Brazil

Research Square (Research Square) (2022)

Carlos Eduardo Sales de Oliveira Werlem Holanda dos Santos Armando Dias Tavares Hernani Chaves Ciro Jorge Appi

Abstract The Resende Basin (Eocene-Oligocene) is a continental taphrogenic structure associated with the Continental Rift of Southeast Brazil and includes the Itatiaia and Acácias members. While the sediment provenance of the Itatiaia member is known, such knowledge regarding the Acácias Member is lacking. This work studies U-Pb ages and Lu-Hf data analyzed by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) in detrital zircons to investigate the sandstone provenance of the Acácias Member. The results suggest that Acácias Member rocks are composed predominantly of Neoproterozoic sources (60%), significant Paleoproterozoic sources (34%) and smaller contributions from Mesoproterozoic (4%) and Archean (2%) sources. The orthogneisses of the Juiz de Fora and Quirino complexes and the metasedimentary rocks of the Andrelandia Complex and Paraíba do Sul were probably the source rocks of Archean and Paleoproterozoic materials. The metasedimentary Embú Complex may be the source of Mesoproterozoic sediments, and the granitoid bodies located south of the Resende Basin (namely,the Rio Turvo granitoid) were important Neoproterozoic sources. No Late Cretaceous ages were found in the 301 analyzed zircons, suggesting that the extensional process that originated in the basin occurred before the Itatiaia alkaline intrusions. In addition, other causes for the lack of zircon grains with the age of alkaline intrusive rocks (Morro Redondo ≈72-70 Ma; Itatiaia ≈70 Ma) may have been related to the basin location with a structural high that could have prevented the alkaline detritus from the Itatiaia and Morro Redondo intrusive bodies from reaching the study area and restricted the supply of sediments from a fluvial system with tributaries on the northern edge. In conclusion, the results of this work reveal that U-Pb ages in detrital zircons reveal a tectonic-driven of the Resende basin sediments. In this way, interpretations of tectonic environments that affected sedimentation require a thorough understanding of the lithological units that compose the basin stratigraphy and factors such as the directions of currents and the presence of structures that compartmentalized sedimentary processes.

Detritus

Geochronology

10.21203/rs.3.rs-1976328/v1

Cite

Citations (1)

Early Jurassic tectonomagmatic stages in the western North Patagonian Region, Argentina: insights from the Comallo volcanic sedimentary complex

Figshare (2023)

Mercedes Barros Cecilia Pavón Pivetta Daniel A. Gregori Leonardo Benedini Leonardo Strazzere

The Comallo volcanic sedimentary Complex in the western North Patagonian Region begins with the development and collapse of Plinian-type eruptive columns of rhyolitic and dacitic composition associated to vent at approximately 192 Ma. Synchronous deposits are originating in alluvial and lagoon environments. The ƐHf(t) values obtained in zircon grains indicate possible derivation by melting Paleoproterozoic and Mesoproterozoic crust. Upwards in the sequence appears basaltic and andesitic lava flows, as well as pyroclastic deposits produced during the eruptions. This volcanism is related to sustained pyroclastic fountains with a U-Pb zircon age of 185 Ma. The volcanic rocks were possibly derived from Paleoproterozoic, Mesoproterozoic, and Neoproterozoic crust affected by juvenile magmas in volcanic-arc environments. Chemical and isotopic variations are mainly due to changes in the local and regional tectonic conditions, the thickness of the continental crust, as well as the dip and age of the subducted oceanic crust.

10.6084/m9.figshare.23566950

Cite

Citations (0)

The 1800-1770 Ma Colíder silicic large igneous province in the Amazonian craton:Crustal evolution using zircon in situ REE compositions, U-Pb ages and Hf isotope analyses.

Goldschmidt Abstracts (2022)

Mauro César Geraldes Bruna Barbosa de Almeida Carlos Augusto Sommer Antonio Paes de Barros

Silicic

Large igneous province

10.46427/gold2022.13200

Cite

Citations (0)

Dom Feliciano Belt orogenic cycle tracked by its pre-collisional magmatism: The Tonian (ca. 800 Ma) Porto Belo Complex and its correlations in southern Brazil and Uruguay

Precambrian Research (2020)

Giuseppe Betino De Toni Maria de Fátima Bitencourt Lauro Valentim Stoll Nardi Luana Moreira Florisbal Bruna Saar de Almeida

Forearc

Back-arc basin

10.1016/j.precamres.2020.105702

Cite

Citations (43)

40Ar/39Ar age, lithogeochemistry and petrographic studies of the Cretaceous Alkaline Marapicu Intrusion, Rio de Janeiro, Brazil

Boletim do Museu Paraense Emílio Goeldi - Ciências Naturais (2015)

Daniel Adelino da Silva Mauro César Geraldes Thaís Vargas Fred Jourdan Camila Cardoso Nogueira

The Marapicu Alkaline Massif is an intrusion into the Marapicu-Gericinó-Mendanha Igneous Complex that is part of the Cretaceous Poços de Caldas-Cabo Frio magmatic lineament located in the Southeastern region of Brazil. Nepheline syenites and phonolites are the most abundant rocks in the massif that also include syenites forming an alkaline series SiO2- undersatured. Chemically this series is predominantly metaluminous and to a lesser extent peralkaline. This series presents both potassic and sodic suites being the first one in greater content. The data show that both basic and intermediary rocks with parental composition sampled in this area have no genetic relationship with the other rocks of the body. Geochemistry data shows that evolution processes involved fractional crystallization with or without continental crust assimilation and also indicates that this alkaline magma was generating from an enriched mantle source. The 40Ar/39Ar age of hornblende (extracted of nepheline syenite) from Marapicu massif is 80.46 ± 0.58 Ma, which it is contrasting, with the idea of age decrease of the hotspot track from west to east on the Poços de Caldas-Cabo Frio magmatic lineament.

Massif

Peralkaline rock

Nepheline

Nepheline syenite

Trachyte

10.46357/bcnaturais.v10i3.474

Cite

Citations (3)

MAGMATISMO PÓS-TECTÔNICO INVESTIGADO POR MEIO DOS MÉTODOS GEOCRONOLÓGICOS U-Pb E Lu-Hf, COMPLEXO PEDRA BRANCA, RIO DE JANEIRO – RJ

Geociências (2020)

Ana Carolina Moterani Rubem Porto Júnior Mauro César Geraldes Maria Virgínia Alves Martins

O Complexo Pedra Branca está localizado geograficamente na zona oeste da cidade do Rio de Janeiro e está inserido tectonicamente no Domínio Costeiro, pertencente ao Terreno Oriental da Faixa Ribeira Central. Os litotipos que formam o Complexo foram gerados em eventos relacionados a Orogênese Brasiliana (~600 Ma), abrigando assim rochas pré- a- pós-colisionais. O estudo de corpos graníticos pós-tectônicos na Faixa Ribeira revela que o magmatismo ocorreu em dois pulsos distintos, com intervalo de aproximadamente 30Ma entre eles. O presente estudo analisou 9 amostras do Complexo Pedra Branca, por meio dos métodos geocronológicos U-Pb e Lu-Hf, referentes às litologias granito Pedra Branca, possível representante do pulso mais antigo e granito Favela, possível representante do pulso mais jovem, a fim de melhorar a compreensão do magmatismo pós-tectônico na região. Os resultados, em sua maioria, corroboraram com os anteriormente descritos na literatura, porém indicaram que o magmatismo no complexo, ocorreu na forma de pulsos progressivos, diminuindo o tempo de intervalo esperado para o mesmo (~20Ma). O indicador petrogenético εHf indicou participação de fontes crustais e mantélicas, dando caráter bimodal ao magmatismo.

10.5016/geociencias.v39i04.14283

Cite

Citations (1)

U–Pb ages via LA-ICP-MS of carbonate from brittle structures of Jandaíra formation, Potiguar basin, NE-Brazil

Journal of South American Earth Sciences (2023)

Letícia Muniz da Costa Cardoso Ticiano José Saraiva dos Santos Luiz Felipe Romero Mauro César Geraldes Carlos E. Ganade

Radiometric dating

10.1016/j.jsames.2023.104316

Cite

Citations (0)

Geochronology (Ar/Ar and K–Ar) of the South Atlantic post-break-up magmatism

Geological Society London Special Publications (2013)

Mauro César Geraldes Akihisa Motoki Antônio Gilberto Costa Carlos Eduardo Miranda Mota Webster Ueipass Mohriak

Abstract This work integrates the available geological information and geochronology data for the Cretaceous–Recent magmatism in the South Atlantic, represented by onshore and offshore magmatic events, including the oceanic islands along the transform faults and near the mid-ocean ridge. The analysis of the igneous rocks and their tectonic settings allows new insights into the evolution of the African and Brazilian continental margins during the South Atlantic opening. Following the abundant volcanism in the Early Cretaceous, the magmatic quiescence during the Aptian–Albian times is a common characteristic of almost all Brazilian and West African marginal basins. However, rocks ascribed to the Cabo Granite (104 Ma) are observed in NE Brazil. In West Africa, sparse Aptian–Albian ages are observed in a few coastal igneous centres. In the SE Brazilian margin, an east–west alkaline magmatic trend is observed from Poços de Caldas to Cabo Frio, comprising igneous intrusions dated from 87 to 64 Ma. Mafic dyke swarms trending NW also occur in the region extending from the Cabo Frio Province towards the Central Brazilian Craton. On the West African side, Early Cretaceous–Recent volcanism is observed in the Walvis Ridge (139 Ma), the St Helena Ridge (81 Ma) and the Cameroon Volcanic Line (Early Tertiary–Recent). Volcanic islands such as Ascencion (1.0–0.65 Ma), Tristão da Cunha (2.5–0.13 Ma) and the St Helena islands (12 Ma) most probably correspond to mantle plumes or hot spots presently located near the mid-Atlantic spreading centre. Within the South America platform and deep oceanic regions, the following volcanic islands are observed: the Rio Grande Rise (88–86 Ma), Abrolhos (54–44 Ma), the Vitória–Trindade Chain (no age), Trindade (2.8–1.2 Ma) and Fernando de Noronha (12–1.5 Ma). There are several volcanic features along the NW–SE-trending Cruzeiro do Sul Lineament from Cabo Frio to the Rio Grande Rise, but they have not been dated. The only known occurrence of serpentinized mantle rocks in the South Atlantic margin is associated with the Saint Peter and Saint Paul Rocks located along the São Paulo Fracture Zone. The Cameroon Volcanic Line in NW Africa is related to the magmatism that started in the Late Cretaceous and shows local manifestations up to the Present. The compilation of all available magmatic ages suggests an asymmetrical evolution between the African and South America platforms with more pre-break-up and post-break-up magmatism observed in the Brazilian margin. This is most likely to have resulted from the different geological processes operating during the South Atlantic Ocean opening, shifts in the spreading centre, and, possibly, the rising and waning of mantle plumes. Supplementary material: A complete table with radiometric dates that have been obtained by universities, government agencies and research groups is available at: www.geolsoc.org.uk/SUP18596

Geochronology

10.1144/sp369.21

Cite

Citations (43)

Evolution of the Jurassic Comallo volcanic sedimentary complex in the western North Patagonian Massif, Rio Negro province, Argentina

International Geology Review (2020)

Mercedes Barros Daniel A. Gregori Leonardo Benedini Paulo Marcos Leonardo Strazzere

Here we define the Comallo volcanic sedimentary complex of the western North Patagonian Massif. It is composed by two members that include 9 lithofacies and 7 facies associations. The lower member is represented by massive and stratified lapilli tuffs, lithic and tuffaceous breccias, coherent andesite-dacite lava-flows, andesitic breccias, and massive crystalline limestones. The upper member consists of red conglomerates, parallel and cross-stratification sandstones, and mudstones. The lower member is interpreted as having been deposited by dilute and dense pyroclastic currents, block and ash deposits and lava-flow, and hypersaline lacustrine environments. The upper member is considered to have been deposited in fluviatile environments. A new U-Pb age of 192.0 ± 3.0 Ma (Sinemurian) was obtained for this complex. It is coeval with several volcanic sedimentary units that crop out along the western North Patagonian Massif, the Neuquén basin and the Extraandean Chubut in pull-apart or rift depocentres. The movements of the NW-SE strike-slip faults that border the northern and southern limits of the Comallo depocentre made possible the development of a pull-apart basin as well as the volcanism and the fluvial system. This and other coeval units were deposited in similar environmental conditions along the North Patagonian Massif, the Neuquén basin and the extraandean Chubut, indicating a similar tectonomagmatic setting, in a tensional rear-arc during Lower Jurassic times.

Massif

Breccia

Lapilli

Stratovolcano

10.1080/00206814.2020.1731854

Cite

Citations (14)

Detrital zircon grains analyzed for U–Pb ages for sedimentary provenance studies: tectonic-driven deposition of the Resende Basin (Eocene–Oligocene) in Southeast Brazil

Journal of Sedimentary Environments (2023)

Carlos Eduardo Sales de Oliveira Werlem Holanda dos Santos Armando Dias Tavares Hernani Chaves Ciro Jorge Appi

Detritus

Geochronology

10.1007/s43217-023-00123-z

Cite

Citations (1)