A5005472174- Paleontology and Stratigraphy of Fossils
- Geography and Environmental Studies
- Geochemistry and Geologic Mapping
- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- Geological formations and processes
- Clay minerals and soil interactions
- Hydrocarbon exploration and reservoir analysis
- Geochemistry and Elemental Analysis
- Geomagnetism and Paleomagnetism Studies
- Fish biology, ecology, and behavior
- CO2 Sequestration and Geologic Interactions
- Planetary Science and Exploration
- Calcium Carbonate Crystallization and Inhibition
- Building materials and conservation
- Evolution and Paleontology Studies
- earthquake and tectonic studies
- Marine and environmental studies
- Recycling and utilization of industrial and municipal waste in materials production
- Iron oxide chemistry and applications
- Magnetic and Electromagnetic Effects
- Atmospheric and Environmental Gas Dynamics
- Marine and Offshore Engineering Studies
- Isotope Analysis in Ecology
- Tailings Management and Properties
Universidade de São Paulo
2012-2024
Fundação de Amparo à Pesquisa do Estado de São Paulo
1996-2004
Instituto de Geociencias
1996-2004
Abstract– The near‐circular Colônia structure, located in the southern suburbs of mega‐city São Paulo, Brazil, has attracted attention geoscientists for several decades due to its anomalous character and complete absence any plausible endogenous geologic explanation formation. Origin by impact cratering been suggested repeatedly since 1960s, but no direct evidence this presented date. New seismic data have recently acquired at Colônia, providing new insights into characteristics possible...
Abstract In this study, we investigate the paleomagnetism of basal Maieberg Formation (Namibia) cap carbonate sequence to elucidate its magnetic properties and paleolatitude deposition, establish global correlations, contribute understanding Snowball Earth postglacial dynamics. Two distinct magnetization components, C1 C2, were identified. is interpreted as a depositional or post-depositional remanent carried by detrital pseudo-single domain (PSD) magnetite, while C2 component thermochemical...
Abstract The Neoproterozoic carbonate rocks of the Araras Group (Amazon Craton) and Sete‐Lagoas Salitre Formations (São Francisco share a statistically indistinguishable single‐polarity (reversed) characteristic direction. This direction is associated with paleomagnetic poles that do not align expected directions for primary detrital remanence. We employ combination classical rock magnetic properties micro imaging/chemical analysis (in thin sections) using synchrotron radiation to examine...
Autonomous underwater vehicle (AUV) mapping of the western Rio Grande Rise (RGR), South Atlantic, and subsequent exploration photography horizontal lava flows exposed in near vertical, faulted escarpments, showed occurrences red clays/weathered volcanic tops trapped between successive alkaline flows. These clays indicate a hiatus eruptions. Here, we report detailed mineralogical, geochemical, rock magnetic characteristics one such distinct clay dredged from ~ 650 m water depth RGR. The...
This paper presents data on the E-W to ENE-WNW-trending graben and horst system in easternmost part of Paraiba State, Brazil. The installation this Tertiary tectonic unit was performed following previous structural trends Precambrian basement, comprising as a typical case brittle-ductile structures reactivation. are positioned Borborema Province, whose main evolutionary phase occurred from Late Neoproterozoic Cambrian, superposing lithostructural units Alto Moxoto terrane (to south),...
This paper presents data on the E-W to ENE-WNW-trending graben and horst system in easternmost part of Paraíba State, Brazil. The installation this Tertiary tectonic unit was performed following previous structural trends Precambrian basement, comprising as a typical case brittle-ductile structures reactivation. are positioned Borborema Province, whose main evolutionary phase occurred from Late Neoproterozoic Cambrian, superposing lithostructural units Alto Moxotó terrane (to south),...
O emprego da difracao de raios X e microscopia eletronica varredura no estudo dos argilominerais contidos nos sedimentos lacustres oligocenicos Formacao Tremembe depositos relacionados do sistema marginal leques aluviais distais Resende, forneceu importantes indicacoes sobre as condicoes paleoambientais paleoclimaticas para a genese destes minerais, contexto evolutivo das bacias Rift Continental Sudeste Brasil durante o Paleogeno. Foram identificados pertencentes aos grupos esmectita...
BRAZIL) Study of the clay mineral content Oligocene lacustrine sediments Tremembé Formation and laterally correlative deposits a marginal system distal alluvial fans Resende has furnished important indicators paleoenvironmental paleoclimatic conditions during génesis these minerais within context Paleogene evolution Continental Rift Southeastern Brazil.X-ray diffraction scanning electron microscopy revealed smectite kaolinite groups and, to much lesser extent, members mica chlorite...
Clay blends are products used in several industrial sectors, such as petrochemical or pharmaceutical. In this work we describe a natural clay blend occurring northeastern Brazil. The aim was to purify and investigate their rheological physical-chemical properties. Foster essays with water organic solvents were utilized access the swelling properties of analyzed sample. Powder X-ray diffractograms (PXRD) analyze qualitatively minerals presents sample blend. Scanning eletronic microscopy (SEM)...
Paleogene sedimentary deposits of the Continental Rift Southeastern Brazil (CRSB) locally show hydrothermal cementation. SEM/EDS and XRD analyses revealed presence quartz opal- CT cements respectively in Itaborai Macacu formations (Itaborai Basin) mainly kaolinite opal-CT Resende Formation (Sao Paulo Taubate basins). The cementation was penecontemporaneous to sedimentation, during main phase development CRSB Eocene, controlled by brittle tectonic structures sediments with high porosity...
A partir de estudos petrográficos e análises por MEV/EDS DRX foi identificado fosfato cálcio terras raras (La, Nd) em depósito lamito argilo-arenoso da Formação Resende, situado na borda norte bacia homônima. Tendo vista suas características morfológicas (hábito prismático hexagonal) composição química, este m,ineral atribuído ao grupo do rabdofânio. Este é autigênico sua origem relacionada à dissolução apatita detrítica, provavelmente a soluções hidrotermais alcalinas, as quais teriam ainda...