Fernando Vesely

Fernando Vesely
Universidade Federal do Paraná | UFPR · Department of Geology

Geologist
Clastic sedimentology and stratigraphy

About

125
Publications
52,089
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Citations
Introduction
I use sedimentary proxies to reconstruct paleoenvironments and predict georesources. I'm currently working on the late Paleozoic ice age of western Gondwana and on the South Atlantic rifted margin.
Additional affiliations
July 2010 - present
Universidade Federal do Paraná
Position
  • Professor (Full)
July 2006 - June 2010
Petróleo Brasileiro S.A.
Position
  • Geologist
March 2002 - August 2006
Universidade Federal do Paraná
Position
  • PhD Student

Publications

Publications (125)
Article
Full-text available
Deep-sea fans are the terminal sinks of clastic sediment, nutrients and pollutants produced in continental landmasses. They are also major targets for oil and gas on continental margins. Several recent studies have applied seismic geomorphology to delineate deep-sea fans, however, most of them describe a relatively short period of the geologic time...
Article
The rooted nature of vegetation allows for individual plants or entire communities to be buried in life position under exceptional geological conditions, thereby preserving their ecology and spatial distribution in the stratigraphic record. Upright lycopsids are not uncommon within paleoequatorial Carboniferous coal-bearing deposits, but they are r...
Article
Ichnology is fundamental to understanding characteristics of paleoenvironments such as hydrodynamic energy, oxygenation, salinity and substrate consistency. The Itararé Group is a Mississippian-Cisuralian lithostratigraphic unit of the Paraná Basin, in which trace fossils have been increasingly employed in paleoenvironmental reconstructions during...
Article
Mass transport deposits (MTDs) contain deformation structures often that are used to determine the kinematics of palaeo-mass flows and hence the orientation of the original slope or gradient upon which the mass flow developed. When integrated with stratigraphic data, the azimuth of the palaeoslope can help elucidate the depositional evolution and p...
Article
Full-text available
A Glaciação Neopaleozoica e a transição completa para condições pós-glaciais são considerados eventos climáticos únicos na história geológica. O principal registro de tais eventos está nas bacias sedimentares gondwânicas, que sugerem uma glaciação dinâmica marcada por repetidos períodos glaciais e interglaciais. A Bacia do Paraná abriga o registro...
Article
Full-text available
A Era Glacial Neopaleozoica (LPIA – Late Paleozoic Ice Age) é representada na Bacia do Paraná pelo Grupo Itararé, cujos estratos fornecem um registro glacial dominado por sucessões glácio-marinhas e raros intervalos deformados por geleiras. Depósitos glaciotectonizados possuem macroestruturas como dobras, falhas e zonas de cisalhamento geradas sub...
Article
Full-text available
Os depósitos de transporte em massa (MTDs) resultam de importantes processos de remobilização e ressedimentação em ambiente subaquático. Esses depósitos são recorrentes ao longo de seção estratigráfica do Grupo Itararé. Portanto, são considerados importantes elementos deposicionais para compreender a evolução tectonoestratigráfica da Bacia do Paran...
Article
Full-text available
The Late Paleozoic Ice Age (LPIA; 362 to 256 Ma) left a record in the Gondwanan sedimentary basins as glacial successions and ice-carved features. In the Paraná Basin the glaciation is recorded in the Itararé Group and on its basal unconformity that contains micro to mega scale erosive features. Diamictites and glacial erosive landforms such as str...
Article
The late Paleozoic Ice Age (LPIA) was one of Earth's most important Phanerozoic climatic events lasting for over 100 Mys. Despite its importance, its history is controversial with two hypotheses that portray glaciation differently (Fig. 1). Traditional views characterize the LPIA as a continuous glacial event that lasted from the Middle Mississippi...
Article
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No sul do Paraná e boa parte do estado de Santa Catarina aflora uma sucessão de arenitos e ritmitos de idade eopermiana, cuja gênese está relacionada à ação de correntes de turbidez. Esses depósitos foram identificados por Salamuni e colaboradores em 1966, sendo assim os primeiros turbiditos descritos no Brasil. No entanto, esse trabalho pioneiro t...
Article
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O Grupo Itararé consiste em um espesso conjunto de rochas permocarboníferas aflorantes por uma área de cerca de 15 mil km2 no segundo planalto paranaense. Contudo, nos mapas geológicos existentes a unidade é tratada como indivisa apesar da sua grande heterogeneidade litológica. Visando preencher essa lacuna de conhecimento, o presente trabalho apre...
Article
Full-text available
The Itararé Group, the Permocarboniferous unit of the brazilian Paraná Basin, encloses the record of the most prominent and widespread glaciation of the Phanerozoic Eon, the Late Paleozoic Ice Age (LPIA). Despite holding the thickest and geographically more extensive record of the referred glaciation, the Itararé Group has scarce marine fossils wit...
Article
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The response of sediment routing to climatic changes across icehouse-to-greenhouse turnovers is not well documented in Earth’s pre-Cenozoic sedimentary record. Southwest Gondwana hosts one of the thickest and most laterally extensive records of Earth’s penultimate icehouse, the late Paleozoic ice age. We present the first high-resolution U-Pb zirco...
Article
Wave-dominated nearshore deposits are commonly regarded as laterally-continuous, homogeneous, sheet-like reservoirs that can be resolved at the parasequence scale. Many reservoirs, however, have an internal complexity that becomes clearer during production, indicating unexpected internal compartmentalization. Modern wave-dominated nearshore environ...
Article
Full-text available
The Paraná Basin, Brazil and the Chaco-Paraná Basin, Uruguay both contain sedimentary records that are critical to reconstructing late Paleozoic ice centers in central Gondwana. The orientations of subglacial landforms and glaciotectonic structures suggest that late Paleozoic glacial deposits in the eastern Chaco-Paraná Basin and the southernmost P...
Conference Paper
Full-text available
Glaciation has been identified in the rock record through near-field evidence for the presence of glaciers in former landscapes, here called “lithological indicators of glaciation” (LIG). LIG give clues on ice volume, thermal regime, and glaciation timing which, in turn, feed paleoclimatic models. However, LIG involves controversy once its recognit...
Conference Paper
Full-text available
The Itararé Group (Paraná Basin, Brazil) has one of the most extensive records of Neopaleozoic glaciation. However, there is few strata where it’s possible to identify subglacial and/or glacio-marginal sedimentation. At the Presidente Getúlio locality (south Brazil) the basal/intermediate portion of the Rio do Sul Formation (upper portion of the It...
Article
Tunnel valleys are subglacial incisions formed mainly by meltwater erosion on soft sediment overridden by glaciers. Despite being common in the Pleistocene and Ordovician glacial record, where their fills constitute excellent aquifers and hydrocarbon traps, tunnel valleys are poorly recognized in late Paleozoic strata. Other types of glacial and no...
Conference Paper
Full-text available
Seismic geomorphology has shown to be a powerful tool to assess deep-water systems, allowing to characterize the geometry and composition of depositional elements and to reconstruct erosion, transport and deposition. However, this approach has been applied mainly to describe a relatively short period of the depositional time, preventing the interpr...
Conference Paper
Full-text available
The Itararé Group and time equivalent Aquidauana Formation represent the Late Paleozoic Ice Age in the Paraná Basin. These sedimentary rocks provide an extensive glacial record which contains deformed intervals interpreted as glaciotectonites, with features such as folds, thrusts and subhorizontal shear zones, which could be produced sub-or proglac...
Article
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The demise of the Late Paleozoic Ice Age has been hypothesized as diachronous, occurring first in western South America and progressing eastward across Africa and culminating in Australia over an ~60 m.y. period, suggesting tectonic forcing mechanisms that operate on time scales of 106 yr or longer. We test this diachronous deglaciation hypothesis...
Article
Mass-transport deposits (MTDs) may show a variety of deformation aspects, from poorly-deformed layers to highly deformed and homogenized deposits, as a result of the different kinds of mass-transport processes involved in their evolution. Previous studies indicate that the downslope flow transformation of MTDs is characterized by increasing disaggr...
Article
Since many reservoirs do not allow direct observation due to their depth and/or difficulty of sampling, studies of analogs have been commonly used as a tool to understand the spatial distribution of reservoir properties. The Paraná Basin is 1.6 million km2 large and has two known petroleum systems. However, there are only 124 irregularly distribute...
Article
Full-text available
The stratigraphy of the Santos Basin has become of great interest in the last decade because of the large oil accumulations in pre-salt (rift) and post-salt (drift) strata. Nevertheless, the most accepted stratigraphic models for the drift phase are only at a basin scale and can still be improved by more detailed work. In this paper we analyze an i...
Article
This paper describes facies relationships and stratigraphic architecture of early Permian deglacial deepwater to fluvio-deltaic deposits exposed in the eastern border of the Paraná Basin, southern Brazil. The studied succession is located in the Rio do Sul depocenter and comprises an upward transition between the topmost interval of the Itararé Gro...
Poster
Full-text available
A deformação oriunda do stress superimposto por geleiras (glaciotectônica) é análoga à tectônica tradicional em diversos aspectos, especialmente do ponto de vista geométrico uma vez que compartilha das mesmas estruturas (como dobras, falhas e até mesmo foliações) e podem-se fazer inferências a respeito da cinemática a partir da medida de direções e...
Article
Full-text available
Carboniferous glaciogenic strata (Itararé Gp.) in the southernmost Paraná Basin, Brazil exhibit soft-sediment deformation features previously interpreted as glaciotectonism. These sediments were studied in detail to confirm that they were deformed by ice and to assess the nature of the glaciation, depositional environments, and paleoclimate in this...
Article
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In this contribution, we present an analysis of the main faciological features of the São Jerônimo da Serra Site, related to the Morro Pelado Member of Rio do Rasto Formation (Middle/Upper Permian), from Paraná State, Brazil, integrated to its taphonomic context. The outcrop, rich in vertebrates and bivalves remains, presents a succession of red si...
Article
Sub-seismic sand-body characterization depends largely on understanding the heterogeneities observed in outcrops of equivalent depositional settings to subsurface reservoirs (reservoir analogs). Outcrop information, however, rarely covers the whole depositional system. Ground-penetrating radar (GPR), on the other hand, is a powerful tool for the hi...
Conference Paper
Full-text available
O Grupo Itararé na região centro-leste do Rio Grande do Sul é interpretado como uma unidade glácio-influenciada preenchendo vales glaciais. Este trabalho elucida acerca do preenchimento de um desses baixos do embasamento, interpretado em trabalhos anteriores como um vale contendo influência glacial direta, denominado depressão do Leão. Essa depress...
Conference Paper
Full-text available
The late Bashkirian to lower Sakmarian deposits of the Itararé Group (Paraná Basin, southern Brazil) compose the thickest, most extensive and one of the longest records of the Late Paleozoic Ice Age (LPIA) among the late Paleozoic glaciated basins. The upper Itararé Group (Taciba Formation) cropping out in the northeast Paraná State is studied and...
Article
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Most ice-age diamictites were emplaced in basinal settings by non-subglacial processes. Nonetheless, the occurrence of diamictite in rock successions is widely employed to estimate ice extent and delimit glacial growth-decay cycles that serve as background for paleoclimate modeling. We report a cyclic diamictite-mudstone succession from the Bashkir...
Article
The timing and geographic distribution of glaciers in high-latitude southern Gondwana during the Late Paleozoic Ice Age remain poorly constrained, ultimately precluding our ability to estimate ice volume and associated climate teleconnections and feedbacks during Earth's penultimate icehouse. Current aerial extents of glaciers, constrained by sedim...
Conference Paper
Full-text available
The reconstruction of geological events and processes in deep time depends on the availability of a robust chronos-tratigraphic framework. Generating such a framework depends on the occurrence of dateable material throughout the sedimentary successions of interest, and on the accuracy and precision of the obtained radioisotopic ages. Reconstructing...
Article
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The location, longevity, and geographic extent of late Paleozoic ice centers in west-central Gondwana remain ambiguous. Paleovalleys on the Rio Grande do Sul Shield of southernmost Brazil have previously been interpreted as fjords carved by outlet glaciers that originated in Africa and emptied into the Paraná Basin (Brazil). In this study, the sedi...
Article
A well-exposed glacial surface sculpted on Precambrian crystalline basement rocks occurs below the glacial succession of the San Gregorio Formation on the eastern border of the Chaco-Parana Basin in Uruguay and was formed in the context of the late Paleozoic Gondwana Ice Age. On the glacial surface are asymmetric parallel streamlined bedrock landfo...
Article
This paper examines a glacial diamictite-bearing succession from the upper Itararé Group (Taciba Formation) in eastern Paraná Basin, Brazil. The object of study provides the opportunity to investigate in detail the late stages of glacial sedimentation during the Late Paleozoic Ice Age (LPIA) in this sector of SW Gondwana, with implications for glac...
Article
Full-text available
The timing of the late Paleozoic glaciation and its terminal deglaciation in the Paraná Basin, Brazil, is unconstrained and prohibits correlation of the Paraná Basin ice record with other high-latitude Gondwanan and low-latitude contemporaneous records. Here, we reexamine the existing U-Pb framework for the Carboniferous-Permian Paraná succession t...
Article
Bottom current-related bedforms, such as depositional and erosive features, are useful indicators of oceanographic circulation and sedimentary balance conditions in both modern and ancient marine environments. The Eocene-Oligocene transition in northern Santos Basin is seismically expressed as a prominent, high-amplitude reflector (horizon H8.1) th...
Article
The Guaratubinha Basin is a late Neoproterozoic volcano-sedimentary basin included in the transitional-stage basins of the South American Platform. The aim of this study is to investigate its tectonic evolution through a detailed structural analysis based on remote sensing and field data. The structural and aerogeophysics data indicate that at leas...
Conference Paper
Full-text available
RESUMO: Depósitos oriundos de fluxos gravitacionais subaquosos vêm sendo amplamente descritos na sucessão permocarbonífera da Bacia do Paraná (Grupo Itararé), assim como de outras bacias correlatas. Porém, no extremo sul da bacia, a caracterização faciológica, assim como das estruturas deformacionais penecontemporâneas associadas, ainda é escassa....
Conference Paper
Full-text available
RESUMO: Depósitos de transporte em massa, formados por fluxos gravitacionais em massa, são extremamente variáveis e apresentam complexo registro estrutural ainda não bem compreendido. O entendimento desses depósitos, tanto sobre o aspecto estratigráfico quanto estrutural, tem importância no estudo paleoambiental e paleogeográfico de depósitos antig...
Conference Paper
Full-text available
The Late Paleozoic Ice Age (LPIA) comprises multiple glacial events 1 to 8 My-long alternated with non-glacial periods that occurred from the Visean (Mississipian) to the earliest-middle-Late Permian. In this context, mass-transport deposits (MTDs) are frequent in the stratigraphic record of the LPIA and have been reported in many basins across the...
Conference Paper
Full-text available
In this contribution we explore recent advances from ongoing research on the interplay between tectonics and climate in the evolution of the Paraná Basin from the mid-late Carboniferous to the earliest Permian, a time characterized by intense climatic and tectonic instabilities in SW Gondwana. Latest Devonian to Pennsylvanian uplifting on the easte...
Research
Full-text available
Resumo do trabalho publicado no "Semana de Ensino, Pesquisa e Extensão da UFPR"
Article
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No sudeste do Estado do Paraná, o Grupo Itararé assenta-se por meio de discordância angular sobre o substrato pré-glacial, que é composto de unidades precambrianas a devonianas, cada vez mais velhas para o sudeste. Devido a esta configuração estratigráfica, tem-se interpretado que os estratos aflorantes na região de Porto Amazonas representam os ní...
Article
Alessandretti et al. (2016) interpreted a northward pattern of fluvial sediment transport in the Paraná Basin based on paleocurrent data and detrital zircon ages obtained from the late Permian Rio do Rasto Formation. In the present paper we discuss geological evidence contrary to their conclusions and propose an alternative late Permian paleogeogra...
Article
Full-text available
In southeastern Paraná state, the Itararé Group rests through an angular unconformity over the preglacial substrate, composed of Precambrian to Devonian units which are increasingly older to the southeast. Because of this stratigraphic configuration, the outcrops of the Itararé Group in the Porto Amazonas region have been interpreted as representin...
Conference Paper
Full-text available
Ground-penetrating radar (GPR) is a reliable and useful method for the analysis of facies and depositional elements in the shallow subsurface, especially in sand-rich successions that usually form prolific hydrocarbon reservoirs in ancient successions. However, a comprehensive interpretation of the depositional character of radarfacies requires a c...
Article
This paper aims at documenting the spatial and genetic relationships between fluvial and subaqueous gravity-flow deposits in an ancient fluvio-deltaic system exposed in the eastern border of the Paraná Basin, southern Brazil. The examined interval comprises the Pedra Alta sandstone and associated deposits, which are included in the glacially-influe...
Article
Full-text available
Seismic facies analysis and seismic geomorphology are important tools for the analysis of depositional elements in subsurface. This paper aimed to investigate the character and genesis of depositional elements and erosive features associated with an Eocene progradational shelf margin in northern Santos Basin. Identified seismic facies are interpret...
Conference Paper
Full-text available
RESUMO: Injectitos são intrusões de sedimentos, principalmente areia, causadas pelo aumento da pressão de fluidos, liquefação dos sedimentos e sua injeção na rocha encaixante. Comumente denominados de diques clásticos, essas estruturas podem ocorrer também na forma soleiras ou corpos irregulares ou como vulcões sedimentares quando há extravasamento...
Conference Paper
Full-text available
RESUMO: A Bacia do Guaratubinha está situada a cerca de 30 km da cidade de Curitiba e possui área de aproximadamente 200 km 2. É considerada como uma bacia de estágio de transição da Plataforma Sul-Americana, formada ao final do Neoproterozoico (604,6±8,6Ma) sobre as rochas do Terreno Luís Alves. Neste trabalho é apresentada a proposta de subdivisã...
Conference Paper
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O clímax da era glacial neopaleozoica ocorreu no Pensilvaniano (Neocarbonífero), cujos registros acham-se em bacias de vários continentes. Por outro lado, registros eopermianos de glaciação, que testemunham o final da era glacial, são relativamente mais raros e menos compreendidos dentro do contexto paleogeográfico gondwânico. Neste trabalho é anal...
Conference Paper
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RESUMO: Depósitos oriundos do preenchimento de paleovales têm sido descritos na sucessão glacial permocarbonífera da Bacia do Paraná e de outras bacias correlatas. Quando formados sobre o embasamento, tais feições são comumente interpretadas como produto de erosão glacial direta e posterior preenchimento durante a deglaciação. O arenito Lapa é um e...