Leonardo Borghi

Leonardo Borghi
Federal University of Rio de Janeiro | UFRJ · Departamento de Geologia

Doctor in Scientia (Geology)

About

194
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Publications

Publications (194)
Article
Branched, bush- or shrub-like crystals are some of the most striking components of carbonates facies from the Cretaceous South Atlantic Pre-salt carbonate reservoirs. Many different analogues have been proposed to help to understand them, including travertines, lacustrine mounds and alkaline lake deposits, among others. Interpretation and genesis o...
Chapter
ABSTRACT No registro icnológico continental das bacias cretácicas brasileiras, as pegadas fósseis são bem representadas, em especial nos depósitos fluviais e marinhos litorâneos. Quase sempre são reconhecidas a partir das feições morfológicas superficiais, as quais incluem dígitos, almofadas pedais, contorno, garras ou mesmo uma deformação sequenci...
Poster
Alguns ambientes terrestres de alta energia e de condições oxidantes, inibem a preservação de fósseis e o acúmulo de matéria orgânica, limitando as interpretações bioestratigráficas e paleoambientais. • A caracterização de pegadas de dinosauros amplia a compreensão da interpretação genética de estruturas de deformação e os cenários paleoambientais...
Article
Bioclastic and siliciclastic deposits of the Morro do Chaves Formation, Early Cretaceous of the Sergipe-Alagoas Basin, northeastern Brazil, show depositional and diagenetic analogies with the Brazilian Pre-salt rift reservoirs. A detailed petrographic study carried out on 221 thin sections from four well-cores were used to define the stratigraphic...
Article
The presence of microbialites in the hypersaline lagoons of Rio de Janeiro is especially important in the study of recent analogs of carbonate rocks with microbial origins, mostly after the discovery of giant petroleum reservoirs in the Brazilian pre-salt section and their similarities with stromatolites from Lagoa Salgada (Rio de Janeiro State). M...
Article
Most recent published work aims to understand pre-salt carbonates interval development and depositional environment conditions. Previous contributions which debate about rift extension usually consist of regional analysis regarding the South Atlantic Ocean opening and keep the debate about syn-rift and sag stage limits. This work uses 3D seismic vo...
Article
The Glossifungites ichnofacies can be a signature of allogenic processes that demark omission, exhumation, and ravinement or indicate autogenic processes impacting several depositional scenarios, such as incised valleys, submarine gullies and canyons, erosive shoreface, tidal channels, and dewatered muddy substrates. Comparatively, autogenic surfac...
Article
Full-text available
The characterization of Mg-clays in rock samples (well P1) from the Barra Velha Formation (Early Cretaceous) allowed the establishment of mineral assemblages on the basis of their kerolite and Mg-smectite (stevensite and saponite) content. Kerolite-rich assemblages (A and B) rarely contain saponite. Assemblage B is composed of kerolite-stevensite m...
Article
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Resumo: A região nordeste do estado do Paraná ainda é pouco conhecida em seus aspectos paleontológicos e estratigráficos. Este trabalho enfocou afloramentos devonianos localizados em Arapoti e Piraí do Sul e buscou o reconhecimento das fácies sedimentares e a definição de tafofácies com a intenção de interpretação paleoambiental e de correlação est...
Article
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The class Tentaculitoidea is an extinct group composed of small carbonatic coniform-shaped invertebrates, distributed from Ordovician to Devonian. This group is more often recorded to the North Hemisphere, being less recorded to South Hemisphere deposits. This study aims (i) analyze the species found in Brazilian Devonian outcrops, in addition (ii)...
Article
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The northeastern region of the state of Paraná, Brazil, is still little known in its paleontological and stratigraphic aspects. This work focused on Devonian outcrops located in Arapoti and Piraí do Sul and aimed at the recognition of sedimentary facies and the definition of taphofacies, with the intention of paleoenvironmental interpretation and s...
Article
The compositional and textural characterization of authigenic Mg-clays from the Barra Velha Formation (Early Cretaceous) samples (well P1) was performed. The Mg-clay mineral assemblage is comprised by Mg-smectite (stevensite and saponite) and kerolite. Based on clay fraction XRD data, was possible to establish four assemblages rich in kerolite (A a...
Article
The coquinas are carbonate rocks with variable content of siliciclastics and have a complex porous framework that implies an issue for their characterization as reservoirs. Furthermore, these rocks are considered important reservoirs due to the giant accumulations in the Campos and Santos basins (Coqueiros and Itapema formations, respectively), inc...
Article
The Aptian Crato Member of the Araripe Basin is a 50-m-thick succession of laminated limestones alternated with siliciclastic rocks. This unit has been receiving attention worldwide mainly because it is one of the most famous fossil Konservat-Lagerstätten, where were identified well-preserved paleofauna and paleoflora. Clay mineralogy and lithogeoc...
Article
The Aptian Romualdo Formation in the Araripe Basin represents the establishment of an epeiric sea in the Brazilian Northeast during the Early Cretaceous. This unit is composed by a succession of limestones, shales, sandstones, and coquinas, which constitute shell beds near the top. This last interval strongly suggests a marine influence in the whol...
Article
Full-text available
In Brazil, the study of carbonate rocks has become very important due to the discovery of oil reservoirs in the Pre-salt interval on the east margin basins (Campos and Santos).The coquinas from Itapema Formation (Barremian/Aptian, Santos Basin) are carbonate rocks interpreted as of lacustrine origin in the literature, and generally represent hetero...
Conference Paper
We propose a workflow to evaluate 4D seismic signals around Water-Alternating-Gas (WAG) injection wells in a Brazilian pre-salt carbonate field. Using a carbonate rock physics modeling approach introduced previously, we forward model 4D seismic responses in the form of 4D attributes and compare these with attributes from expected 4D signals to quan...
Conference Paper
The Lower Cretaceous Barra Velha (BVE) unit is the main reservoir in our area of study, which consists of heterogeneous carbonates beneath a thick salt layer. Pre-Salt wells have shown that underneath the BVE reservoir, there could be several non-reservoir rocks (e.g., microporous carbonates, shales, volcanics) embedded in different formations that...
Article
By the Early Cretaceous, the Araripe Basin (Northeastern Brazil) is interpreted as having gone through a phase of tectonic quiescence, during which rates of sediment accumulation were mostly modulated by climatic variations. The Crato Member (Santana Formation, upper Aptian of Araripe Basin) consists of gray calciferous mudstone and parallel-strati...
Article
Lamprophyres and phonolite intrusions were sampled in the so-called Pre-Salt sequence of well 1-BRSA-905-RJS in northern Santos Basin nearby the Cabo Frio Structural High in SE Brazil. These alkaline rocks indicate the existence of a strongly silica-undersaturated trend. However, fractional crystallization modeling as well as Sr-Nd-Pb-Hf isotope da...
Article
Full-text available
Dados diretos de subsuperfície são ainda escassos na borda leste da Bacia do Paraná e perfis de poços são rotineiramente utilizados para interpretação litológica. Com base nisto, propõe-se um estudo integrado que objetiva a caracterização litológica e gamaespectométrica do testemunho do poço 2-TB-1-PR (Tibagi), amostrado continuamente da superfície...
Article
The Santos Basin hosts several giant carbonate oilfields in the Pre-salt province and is one of the most important hydrocarbon discoveries in the past years. These carbonate reservoirs present exceptional reservoir quality with a challenging depositional and diagenetic history that produced complex and heterogeneous pore systems. As one of the most...
Article
This paper presents new taxonomic reports and biostratigraphic inferences based on ostracods in the basal section of the cored well UFRJ-2-LRJ-01-SE, perforated in the Votorantim quarry, Sergipe-Alagoas Basin, Brazil. The studied material comprised 44 samples in the range 438.65 to 315.30 m, identifying 52 species of ostracods distributed in 31 gen...
Article
The Morro do Chaves Formation is a hybrid sedimentary succession composed of shell beds interbedded with mudstones and sandstones deposited during the rifting process of the Gondwana in a complex lake rift system, forming one of the thickest coquina deposits around the world. Despite being deeply investigated over the last decades in outcrops, the...
Article
Full-text available
The pore structure of many carbonate formations is known to be very complex and heterogeneous. Heterogeneity is manifested by the presence of different types, sizes, and shapes of pores resulting from sedimentation and diagenetic actions. These complexities greatly increase uncertainties in estimated rock hydraulic properties in that different perm...
Article
[191107-012847] Although fossil footprints are generally recognized by morphological data from autopodia, in some cases they can also be characterized by a sequential deformation of the substrate, since the footprint reaches many sedimentary levels beyond the surface. In such cases, these features are preserved as deformation structures which can b...
Article
Full-text available
Este trabalho desenvolveu-se através dos resultados das análises petrográficas, químicas e litogeoquímicas do testemunho do poço 1UN30, perfurado na Bacia do Parnaíba. A petrografia aponta: a rocha ígnea como de textura glomeroporfirítica e mineralogia essencial de plagioclásio e piroxênio, com olivina e minerais opacos acessórios; o arenito como q...
Article
All published chronostratigraphic charts of the Espírito Santo basin, Brazil, show stratigraphic frameworks based on second-order depositional sequences. The absence of published high-resolution biostratigraphic analyses precludes the proposition of a higher order stratigraphic framework. This work breaks down the second-order depositional sequence...
Article
Corpos arenosos de plataforma, como os cordões arenosos (sand ridges), constituem um significativo tipo de reservatório em bacia de margem continental, o que chama atenção para que esses corpos possam ser melhores estudados e caracterizados. Esse trabalho, localizado na região centro-oeste da bacia do Espírito Santo, visa caracterizar esse tipo de...
Article
Full-text available
This work analyzes the results of the SP2 core (50.30 m length) collected in the coastal plain of Sepetiba Bay (SB; SE Brazil), 2 km away from the Guandu River mouth (latitude 22° 55′S, longitude 43° 46′W). It aims to study the influence of the Holocene relative sea level (RSL) on the coastal plain of SB. After description, the SP2 core was sampled...
Article
Coquinas constitute widespread deposits in lacustrine, estuarine, and shallow marine settings, where they are a valuable source of information on environmental conditions. Thick coquina successions were deposited in a series of lacustrine rift basins that formed along the Brazilian Continental Margin during the early stages of the opening of the So...
Article
Full-text available
In the Parnaíba basin, northeastern Brazil, some records of basic tholeiitic magmatism have been recognized as part of large igneous provinces (LIP’s). They are represented by the Mosquito basaltic flows (Triassic–Jurassic; ca. 200 Ma) that occurs in the west portion of the basin as well as the Sardinha diabases (Cretaceous; ca. 124 Ma) eastwards....
Book
Full-text available
Coquinas constituem importantes depósitos sedimentares bioclásticos em ambientes de sedimentação lacustre, estuarino e marinho raso. Seu estudo é de fundamental importância para geocientistas interessados em diversas temáticas, desde a reconstrução paleoambiental e paleoecológica dos organismos até sua relevância como rocha-reservatório de hidrocar...
Chapter
Full-text available
From abundant and diverse geological evidence is possible to know that climate have varied tremendous throughout geologic time. Although natural archives of these variations are scarce in Precambrian successions, the Phanerozoic record comprises a wide variety of data that enables the knowledge of the causes, frequencies and geographic scale of pal...
Article
Full-text available
O Complexo Deltaico do Rio Paraíba do Sul (CDRPS), localizado no norte do Estado do Rio de Janeiro, compreende os depósitos quaternários da porção emersa da bacia de Campos. A região é caracterizada por conjuntos de cordões arenosos pleistocênicos ao sul, depósitos flúvio-lagunares no eixo central e conjuntos de cordões arenosos holocênicos ao nort...
Article
Full-text available
Esse estudo apresenta modelos de eltrofácies para dois poços com testemunhos e amostras laterais da Formação Coqueiros, Cretáceo inferior da Bacia de Campos. O POÇO-1 está localizado em águas profundas no sul da bacia e é composto por rochas carbonáticas bioclásticas, siliciclásticas e rochas híbridas. A modelagem de eletrofácies para esse poço dis...
Article
This paper presents new biostratigraphic data and paleobiogeographic inferences obtained from the nannofossil content of the cored well UFRJ-2-LRJ-01-SE, drilled in the Sergipe-Alagoas Basin, Brazil. This material represents one of the best and most complete recovered sections of the mid-Cretaceous in the whole South America. Quantitative analyzes...
Conference Paper
Full-text available
The present study implemented aeromagnetic data processing as a complementary tool for improving structural interpretation of the poorly-solved Araripe Basin, northeast Brazil. Here, two Araripe sub-basins were studied. The structural analysis through seismic section, digital elevation model (SRTM), and vertical derivatives of aeromagnetic anomalie...
Article
Full-text available
O Complexo Deltaico do Rio Paraíba do Sul (CDRPS), localizado no litoral norte do Estado do Rio de Janeiro, é uma importante planície costeira de idade quaternária que engloba parte da porção emersa da Bacia de Campos. Embora seja alvo de estudos sedimentológicos e estratigráficos desde a década de 1940, os estudos envolvendo amostragens de subsupe...
Article
Full-text available
Na transição Cenomaniano–Turoniano registra-se mundialmente o maior evento de subida do nível eustático do Cretáceo. Insere-se nesse contexto a Formação Cotinguiba (Bacia de Sergipe-Alagoas), que resulta da transgressão responsável pela construção de uma rampa carbonática com talude distal, durante o afogamento do sistema plataformal sotoposto (até...
Conference Paper
Full-text available
Dinoturbation structures from the Aptian of Araripe Basin, Brazil, as tools for stratigraphic correlation Terrestrial environments of the Brazilian Cretaceous basins, sometimes are characterized by high-energy and oxidizing conditions, that tend to prevent the fossil preservation and organic matter accumulations, limiting their biostratigraphic and...
Article
This study presents a facies characterization, facies succession and conceptual depositional model of the Coqueiros Formation, Lower Cretaceous of Campos Basin, based on core analyses of two wells. WELL-1 is a shallow water drilling located at south of Campos Basin within the Badejo structural high, and WELL-2 is an ultra deep water drilling locate...
Article
The Paraíba do Sul Deltaic Complex (PSDC) landscapes diversified markedly over the last 123,000 years B.P. The PSDC is characterized by non-marine to marine deposits, and very complex non-marine deposits in its uppermost part. In such a setting, the characterization of the sedimentary organic matter is a useful tool for conduction paleoenvironmenta...
Article
Carbonate rocks play an important role in petroleum geology by acting as reservoir rocks, generators, and even hydrocarbon sealants, accounting for about half of the oil and gas reserves known in the world. The study of these carbonate rocks have become very important in the hydrocarbon exploration scene in Brazil because of they consist in analogo...
Article
Full-text available
Organosedimentary deposits formed by interaction of carbonate and terrigenous sediments are commonly found in the Lagoa Salgada, a holocenic environment located on the north of Rio de Janeiro state which records environmental and biological information of their evolution. Microbial mats are widespread however stromatolites are very prominent and ex...
Article
Full-text available
O estudo do delta holocênico do rio Paraíba do Sul (RJ) a partir da interação de dados fotoestratigráficos, tex-turais e de minerais pesados, permitiu a delineação de petrofácies relacionadas a diversas rochas-fonte e processos sedimentares. A região do delta foi separada em planícies norte e sul, tendo o rio como referencial. A planície sul foi di...
Article
The Cenomanian–Turonian transition is globally recorded as the highest eustatic rise in the Cretaceous. In that context, the Cotinguiba Formation (Sergipe-Alagoas Basin) results from a transgression, which was responsible for building up a distally steepend carbonate ramp, during the drowning of the underlying platform system (until the mid Coniaci...
Article
Global oceanic anoxic events occurred throughout the Cretaceous and changed the sedimentation patterns in many sedimentary basins around the world. There is still a lack of data and the need to identify new sections affected by these events in the Southern Hemisphere in order to provide insights on the extent of low-oxygen oceanic conditions. This...
Article
Full-text available
This study intends to evaluate baseline concentrations of chemical elements for unpolluted sediments of Sepetiba Bay (SE Brazil). It analyzes the concentrations of potentially toxic elements (PTE) and other chemical elements (by Inductively Coupled Plasma Mass Spectrometry and Inductively Coupled Plasma Emission Spectrometry) from the upper part of...
Article
Full-text available
The Cretaceous of Brazil is widely known for vast carbonate platforms that developed along the Brazilian east coast. An onshore well drilled and logged in Sergipe State on a structural low allowed the recovery and study of a continuous 439-m core section that records an interval aged from the late Albian to the early Turonian. The section is charac...
Conference Paper
Full-text available
Accurate determination of rock types is essential for the characterization of a reservoir. Rock typing can be an arduous task due to high variation in the pore geometry and a lack of correlation between pore body and pore throat sizes, among other factors. In this work, rock types were determined from permeability bands in coquinas of the Morro do...