Ricardo I F Trindade

Ricardo I F Trindade
University of São Paulo | USP · Departament of Geophysics

PhD

About

310
Publications
62,822
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
5,798
Citations
Additional affiliations
March 2012 - present
University of São Paulo
Position
  • Professor (Full)
September 2006 - February 2012
University of São Paulo
Position
  • Professor (Associate)
November 2001 - August 2006
University of São Paulo
Position
  • Professor (Assistant)

Publications

Publications (310)
Article
Full-text available
The Aptian was characterized by dramatic tectonic, oceanographic, climatic and biotic changes and its record is punctuated by Oceanic Anoxic Events (OAEs). The timing and duration of these events are still contentious, particularly the age of the Barremian-Aptian boundary. This study presents a cyclostratigraphic evaluation of a high-resolution mul...
Article
The Neoproterozoic included changes in oceanic redox conditions, the configuration of continents and climate, extreme ice ages (Sturtian and Marinoan), and the rise of complex life forms. A much-debated topic in geobiology concerns the influence of atmospheric oxygenation on Earth and the origin and diversification of animal lineages, with the most...
Article
Full-text available
Speleothems can provide high-quality continuous records of the direction and relative paleointensity of the geomagnetic field, combining high precision dating (with U-Th method) and rapid lock-in of their detrital magnetic particles during calcite precipitation. Paleomagnetic results for a mid-to-late Holocene stalagmite from Dona Benedita Cave in...
Article
Full-text available
During the mid-Cretaceous, the Earth experienced several environmental perturbations, including an extremely warm climate and Oceanic Anoxic Events (OAEs). Submarine volcanic episodes associated with formation of large igneous provinces (LIPs) may have triggered these perturbations. The osmium isotopic ratio (187 Os/ 188 Os) is a suitable proxy for...
Article
Full-text available
Acritarchs, a polyphyletic group of acid-resistant organic-walled microfossils, dominate the eukaryotic microfossil record in the Proterozoic (2500–541 Ma) yet exhibit significant reduction in diversity and size at the transition to the Phanerozoic (541–520 Ma). Despite the difficulty of tracing phylogenetic relationships among acritarchs, changes...
Article
Full-text available
The South Atlantic Anomaly (SAA) is a region at Earth’s surface where the intensity of the magnetic field is particularly low. Accurate characterization of the SAA is important for both fundamental understanding of core dynamics and the geodynamo as well as societal issues such as the erosion of instruments at surface observatories and onboard spac...
Article
Vase-shaped microfossils (VSMs) attributed to testate amoebae occur globally in diverse assemblages in Tonian rocks. These microfossils have thus been considered a potential biostratigraphic tool, especially for the interval between 789 and 729 Ma. Here we report a diverse and well-preserved in situ VSM assemblage, including several taxa previously...
Poster
Full-text available
A respiração aeróbica gera ATP a partir da oxidação de moléculas orgânicas no Ciclo de Krebs, onde uma das etapas desse ciclo é a conversão de succinil-CoA em succinato, catalisada pela enzima succinil-CoA-sintetase, gerando uma molécula de ATP ou GTP. A reconstrução evolutiva e a datação molecular de proteínas associadas com o metabolismo aeróbico...
Article
The Cambrian Santa Angélica intrusive complex (SAIC - SE, Brazil), is composed of two lobes with concentric fabric and bull's eyes shapes, each lobe containing a mafic nuclei and granitic borders. It intruded during the post-collisional phase of the Araçuaí orogen (AO). Although SAIC'S internal structure is described as exclusively magmatic, promin...
Chapter
Congo and Sao Francisco cratons are made of several Archean and Paleoproterozoic nuclei welded together by Paleoproterozoic belts. The pair is considered to be a stable lithospheric entity by 2.0 Ga and hosts fissural mafic magmatism at 2.7, 2.6, 1.71, 1.50, and 0.92 Ga; magmatic events at 1.38 and 1.10 Ga are restricted to Africa. Some of these di...
Chapter
Here, we reassess the paleomagnetic database for Amazonia and its geodynamic implications for supercontinents. According to paleomagnetic and geological data Amazonia and West Africa joined at c.2.00 Ga defining a single long-lived block. This landmass eventually formed a part of the Columbia supercontinent together with Baltica and Laurentia betwe...
Chapter
We present a compilation of reliable Precambrian paleomagnetic poles from three successive international workshops (in years 2009, 2014, 2017), comprising paleomagnetists specializing in Precambrian tectonic reconstructions. The working groups compiled lists of two global classes of poles, published through the end of 2017. “Grade-A” results are ju...
Article
Full-text available
Investigations into long-term geomagnetic variations provide useful information regarding paleomagnetic field behavior. In this study, we assess the latitudinal structure of paleosecular variation (PSV) and the time-averaged field (TAF) for the Brunhes normal and Matuyama reverse chrons, and for the 0–10 Ma period, from an updated and reviewed pale...
Article
Establishing the positions of continents during the initial stages of Earth's evolution is one of the most important challenges in geosciences today. This challenge is mainly due to the severe limitations in obtaining geological and/or geophysical data from early Earth time, particularly robust paleomagnetic data. Here, we report the first paleomag...
Article
Global Neoproterozoic glaciations are related to extreme environmental changes and the reprise of iron formation in the rock record. However, the lack of narrow age constraints on Cryogenian successions bearing iron-formation deposits prevents correlation and understanding of these deposits on a global scale. Our new multiproxy data reveal a long C...
Poster
Full-text available
Investigations about long-term geomagnetic variations are essential for a better assessment of the paleomagnetic field behavior. However, on timescales of a few million years the structure of the average field is especially limited by the inhomogeneous spatio-temporal sampling of paleomagnetic records. Here, we assess the latitudinal behavior of th...
Article
Full-text available
The Ediacaran-Cambrian transition is marked by the diversification of metazoans in the marine realm. However, this is not recorded by the Ediacaran-Cambrian Bambuí Group of the São Francisco basin, Brazil. Containing the sedimentary record of a partially confined foreland basin system, the Bambuí strata bear rare metazoan remnants and a major carbo...
Article
Full-text available
The biological toolkits for aerobic respiration were critical for the rise and diversification of animals. Aerobic life forms generate ATP through the oxidation of organic molecules in a process known as the Krebs’ Cycle, where the enzyme isocitrate dehydrogenase (IDH) regulates the cycle's turnover rate. Evolutionary reconstructions and molecular...
Presentation
Full-text available
Deformation Bands (BDs) generate petrophysical heterogeneities in rocks that constitute hydrocarbon and groundwater reservoirs. The marked reorganization and/or fragmentation of grains can result in a significant reduction in porosity and permeability of the host rock, influencing the fluid percolation dynamics. The main objective of this work is t...
Poster
Full-text available
The Neoproterozoic included changes in oceanic redox conditions, the configuration of continents and climate, extreme ice ages (Sturtian and Marinoan), and the rise of complex life forms. A much-debated topic in geobiology is related to the influence of atmospheric oxygenation on Earth and the origin and diversification of animal lineages, with the...
Article
Full-text available
The authors would like to correct in the paper published in Gondwana Research (Antonio et al., 2021) the value of the Euler pole used for Amazonia in the proposed reconstruction (Fig. 7), and the name of the AM3 pole used for Amazonia (Table 2). The corrected Fig. 7 and this caption are presented below.The AM3 pole for Amazonia used in this paper f...
Article
Knowledge about flow dynamics of volcanic sequences is fundamental for understanding their emplacement and consequently the evolution of the associated volcanic terrain. Despite this importance, studies that apply different approaches to ancient volcanic systems are still rare. In this paper, we study the case of silicic volcanic sequences in south...
Article
Despite their importance in constraining the dynamics of Gondwana’s final phase of assembly, Cambrian paleomagnetic data from Gondwana are sparse. The Cambrian paleomagnetic dataset of Western Gondwana is especially poor, being defined by only a handful of poles. Here we contribute new Furongian paleomagnetic data from the ~500 Ma post-collisional,...
Conference Paper
Full-text available
RESUMO: Situado na Zona Vulcânica Sul dos Andes (Argentina), o Complexo Vulcânico Caviahue-Copahue (CVCC) compõe um dos centros vulcânicos mais ativos do globo terrestre, com intenso registro de episódios efusivos e explosivos durante os últimos 6 Ma. O CVCC é constituídos pelo vulcão Copahue e pela Depressão de Caviahue, uma feição morfológicicame...
Article
The early to mid-Aptian was punctuated by episodic phases of organic-carbon burial in various oceanographic settings, which are possibly related to massive volcanism associated with the emplacement of the Ontong Java, Manihiki, and Hikurangi oceanic plateaus in the southwestern Pacific Ocean, inferred to have formed a single plateau called Ontong J...
Article
Full-text available
Archaeological research of late Pleistocene sites in northeastern Brazil has rarely analyzed site formation processes from a geoarchaeological perspective. This has contributed to the long-held debate over the reliability of Pleistocene ages and the anthropic origin of stone tools and combustion features. In this work, we combine high-resolution ge...
Article
The Borborema Province (NE-Brazil) experienced widespread intracontinental deformation associated with low-pressure metamorphism during the Neoproterozoic-Cambrian assembly of West Gondwana. The widespread intracontinental deformation was driven by tectonic stresses derived from two continental collisions reported in the literature at ca. 630–610 M...
Article
Post-orogenic plutons are excellent recorders of the last stages of collapsing orogens. In the Neoproterozoic-Cambrian Araçuaí orogen (Brazilian Southeast), one of the Brasiliano orogenies (Western Gondwana), voluminous amounts of Cambrian magmatism crop out. The Venda Nova pluton (VN) is located at the southern portion of the AO, exhibiting a nori...
Data
Supplementary file on "AMS and rock magnetism in the Caviahue-Copahue Volcanic Complex (Southern Andes): Emission center, flow dynamics, and implications to the emplacement of non-welded PDCs" (https://doi.org/10.1016/j.jvolgeores.2021.107283). Includes thermomagnetic curves, UnMix processing, and FORC diagrams.
Article
Pyroclastic deposits can cover significant areas and register major geological events. Despite their importance, understanding depositional dynamics of pyroclastic density currents (PDCs) and linking explosive deposits to their emission centers is still a challenge, especially in the case of non-welded, massive ignimbrites. Located in the Southern...
Preprint
Full-text available
Pyroclastic deposits can cover significant areas and register major geological events. Despite their importance, understanding depositional dynamics of pyroclastic density currents (PDCs) and linking explosive deposits to their emission centers is still a challenge, especially in the case of non-welded, massive ignimbrites. Located in the Southern...
Article
The Neoproterozoic-Paleozoic transition (~541 Ma) was a turning point in Earth's history resulting in great biological changes between the microbial Precambrian life and the Ediacaran biotic revolution with the occupation of the sedimentary substrate, the dawn of biomineralization and the appearance of the earliest multi-cellular organisms. In para...
Article
Full-text available
Fe-bearing minerals are a tiny fraction of the composition of speleothems. They have their origin in the karst system or are transported from the drainage basin into the cave. Recent studies on the magnetism of speleothems focused on the variations of their magnetic mineralogy in specific time intervals and are usually limited to a single sample. I...
Article
Full-text available
Fe-bearing minerals are a tiny fraction of the composition of speleothems. They have their origin in the karst system or are transported from the drainage basin into the cave. Recent studies on the magnetism of speleothems focused on the variations of their magnetic mineralogy in specific time intervals and are usually limited to a single sample. I...
Article
Full-text available
The physico-chemical characteristics of particulate matter (PM) in African cities remain poorly known due to scarcity of observation networks. Magnetic parameters of PM are robust proxies for the emissions of Fe-bearing particles. This study reports the first magnetic investigation of PM2.5 (PM with aerodynamic size below 2.5 μm) in Africa performe...
Article
Full-text available
Despite representing one of the largest cratons on Earth, the early geological evolution of the Amazonia Craton remains poorly known due to relatively poor exposure and because younger metamorphic and tectonic events have obscured initial information. In this study, we investigated the sedimentary archives of the Carajás Basin to unravel the early...
Article
Rhyolites compose an important record in the volcanic history of Earth, with significant occurrences in volcanic arcs, large igneous provinces and post-collisional terranes, often associated with explosive events. In several geologic provinces, rhyolites dominate as the most expressive geologic units (e.g., Silicic Large Igneous Provinces-SLIPs). D...
Presentation
Full-text available
The finer fraction of the particulate matter (PM) is the most harmful health wise, as it has more capacity to reach deeper parts of the respiratory system. Among other constituents, PM also contains iron oxides, allowing for the use of magnetic methods in its investigation as proxies for the whole of PM. Those methods present advantages in comparis...
Article
Full-text available
The paleogeography of the Meso-Neoproterozoic Rodinia supercontinent remains debated partly because many stable cratons still lack reliable paleomagnetic data for this period. A new geochronological and paleomagnetic study was conducted on the NNW-trending Manso dyke swarm of southern West Africa (Ghana) to clarify the position of this unconstraine...
Article
Large igneous province (LIP) volcanism has been proposed as a key trigger of several major climate and environmental perturbations during the Phanerozoic Aeon. Large-scale carbon emissions associated with one or both of magmatic degassing from the Greater Ontong-Java Plateau (G-OJP) and intrusion of organic-rich sediments by High Arctic LIP (HALIP)...
Article
Full-text available
Geomagnetic field reversals remain as one of the most intriguing problems in geophysics and are regarded as chaotic processes resulting from a dynamo mechanism. In this article we use the polarity scale data of the last 170 Myrs collected from the ocean floor to provide robust evidence for an inverse relationship between the complexity of sequences...
Article
The Uatumã event is a silicic large igneous province (SLIP) covering an area of 1.500.000 km 2 of the Amazonia craton at ca. 1890-1850 Ma. New paleomagnetic data and U-Pb apatite ages for coeval microgranitic, andesitic, and basaltic dykes in the Carajás Province (southeastern Amazonia craton) are presented. Two primary characteristic remanent magn...
Article
The Bambuí Group is a marine sedimentary record of an intracratonic foreland basin developed at the terminal Ediacaran and early Cambrian during the assembly of West Gondwana. Here we present a basin-scale high-resolution Sr isotope stratigraphy for the basal Bambuí Group, aiming to understand the spatial and temporal variations of the ⁸⁷Sr/⁸⁶Sr ra...
Article
Full-text available
Quantum diamond microscope (QDM) magnetic field imaging is a recently developed technique capable of mapping magnetic field sources in geologic samples at 1 micrometer resolution. Applying QDM imaging to speleothems can provide high-resolution time series of detrital input into the cave environment, which, in turn, can yield useful paleoenvironment...
Chapter
Congo and São Francisco cratons are made of several Archean and Paleoproterozoic nuclei welded together by Paleoproterozoic belts. The pair is considered to be a stable lithospheric entity by ~2.0 Ga and hosts fissural mafic magmatism at 2.7–2.6, 1.71, 1.50, and 0.92 Ga; magmatic events at 1.38 and 1.10 Ga are restricted to Africa. Some of these di...
Poster
The exposition to particulate matter (PM) has well known health hazards and the finer fractions are the most dangerous ones. The use of magnetic methods to investigate the PM has been proved successful, and those methods are sensible to the finer fractions (superparamagnetic, SP) of the iron oxides. Children are especially at risk, since their spec...
Presentation
The particulate matter (PM) presents in air has well known health hazards, finer fractions being particularly harmful. The magnetic methods present advantages in PM investigation, being quick and cost effective, and also sensible enough to investigate finer fractions of the iron oxides. West African cities are being subject to increasing air pollut...
Article
The Alice Boer site, located in Southeastern Brazil, was considered to be one of the oldest sites in the Americas, and a strong candidate for being a pre-Clovis site. Ages obtained by researchers during the 1970s and 1980s put the site inside a chronological range between 2 and 14 ka, eventually reaching as old as 30 ka or even 130 ka. Between 2010...
Article
The Alice Boer site, located in Southeastern Brazil, was considered to be one of the oldest sites in the Americas, and a strong candidate for being a pre‐Clovis site. Ages obtained by researchers during the 1970s and 1980s put the site inside a chronological range between 2 and 14 ka, eventually reaching as old as 30 ka or even 130 ka. Between 2010...
Article
Full-text available
Spinel is a ubiquitous mineral in mafic/ultramafic rocks. Spinel cores chemistry is extensively used as a petrogenetic proxy while their alteration phases, ferritchromite and Cr‐magnetite, are used as metamorphic grade indicators. However, the magnetic properties and composition of these phases are still ill‐defined and no consensus exists concerni...
Article
Anisotropy of magnetic susceptibility (AMS) and anhysteretic remanent magnetization (AARM) are tools to characterize flow structures and emplacement conditions of volcanic and subvolcanic bodies, directly related to magnetic fabrics. An AMS and AARM study was performed to contribute to the understanding of the processes involved in magma transporta...
Chapter
Here, we reassess the paleomagnetic database for Amazonia and its geodynamic implications for supercontinents. According to paleomagnetic and geological data, Amazonia and West Africa joined at ca. 2.00 Ga defining a single long-lived block. This landmass eventually formed a part of the Columbia supercontinent together with Baltica and Laurentia be...
Chapter
12 The Amazonian Craton formed as a result of long-lived crustal growth from the 13 Archean to the Late Mesoproterozoic. This craton can therefore be considered a 14 dynamic fragment in time and space-termed here Amazonia-from the perspective of 15 supercontinent cycles. We reassess and integrate the paleomagnetic database for 16 Amazonia and the g...
Conference Paper
Full-text available
Mid-Neoproterozoic is a period of transition between the supercontinent Rodinia and the amalgamation of the Gondwana. An incomplete paleomagnetic database does not allow to constrain the precise paleogeography of this transition. This study concerns the West African craton which remains the least studied craton in paleomagnetism. We propose a preli...
Conference Paper
Full-text available
Pyrites from Neoproterozoic successions often present extremely 34 S-enriched isotope compositions, referred to as superheavy pyrites. The genesis of these anomalous signals has been debated either in terms of paleodepositional controls, resulting from microbial sulfate reduction under sulfate-limited conditions, or in terms of late diagenesis ther...