Eric Siciliano Rêgo
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View article: Consolidating the isotopic trichotomy of planetary materials with new evidence
Consolidating the isotopic trichotomy of planetary materials with new evidence Open
View article: Intense weathering attending the emergence of the SE Amazonian Craton during the Neoarchean
Intense weathering attending the emergence of the SE Amazonian Craton during the Neoarchean Open
Sedimentological evidence and detrital zircon provenance analysis show that the Amazonian Craton, Brazil, was subjected to large-scale subaerial erosion by c. 2.7 Ga. To assess weathering conditions attending the emergence of the Amazonian…
View article: Crystallization Pathways of Iron Formations: Insights From Magnetic Properties and High‐Resolution Imaging of the 2.7 Ga Carajás Formation, Brazil
Crystallization Pathways of Iron Formations: Insights From Magnetic Properties and High‐Resolution Imaging of the 2.7 Ga Carajás Formation, Brazil Open
Banded iron formations (BIFs) are chemical sedimentary rocks commonly utilized for exploring the chemistry and redox state of the Precambrian ocean. Despite their significance, many aspects regarding the crystallization pathways of iron ox…
View article: Neoarchaean oxygen-based nitrogen cycle en route to the Great Oxidation Event
Neoarchaean oxygen-based nitrogen cycle en route to the Great Oxidation Event Open
View article: The absence of nickel effect on iron isotope fractionation during core formation
The absence of nickel effect on iron isotope fractionation during core formation Open
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View article: <scp>SIMS</scp> Iron Isotope Measurements of the Balmat Pyrite Reference Material: A <scp>Non‐Unique δ<sup>56</sup>Fe</scp> Signature
<span>SIMS</span> Iron Isotope Measurements of the Balmat Pyrite Reference Material: A <span>Non‐Unique δ<sup>56</sup>Fe</span> Signature Open
In situ iron isotope ratios (δ 56 Fe) in sulfide measured by secondary ion mass spectrometry (SIMS) can provide valuable information on several of Earth's surface processes. SIMS relies on the use of a matrix‐matched reference material to …
View article: Past and Present Dynamics of the Iron Biogeochemical Cycle
Past and Present Dynamics of the Iron Biogeochemical Cycle Open
This chapter investigates the complexities surrounding the iron biogeochemical cycle from the Archean to present, with a focus on assessing the balance between iron sources and sinks during long periods of Earth's history with relatively i…
View article: Neoarchean environments associated with the emplacement of a large igneous province: Insights from the Carajás Basin, Amazonia Craton
Neoarchean environments associated with the emplacement of a large igneous province: Insights from the Carajás Basin, Amazonia Craton Open
View article: Low-phosphorus concentrations and important ferric hydroxide scavenging in Archean seawater
Low-phosphorus concentrations and important ferric hydroxide scavenging in Archean seawater Open
The availability of nutrients in seawater, such as dissolved phosphorus (P), is thought to have regulated the evolution and activity of microbial life in Earth's early oceans. Marine concentrations of bioavailable phosphorus spanning the A…
View article: Titanium isotopic insights into peralkaline magma differentiation
Titanium isotopic insights into peralkaline magma differentiation Open
View article: Géochimie des éléments et des isotopes des formations de fer et des carbonates : nouvelles perspectives sur le cycle du Fe et reconstructions paléoenvironnementales au Néoarchéen à Carajás, Brésil
Géochimie des éléments et des isotopes des formations de fer et des carbonates : nouvelles perspectives sur le cycle du Fe et reconstructions paléoenvironnementales au Néoarchéen à Carajás, Brésil Open
Iron formations (IFs) are well-studied chemical archives of Precambrian seawater,thus offering evidence of past oceanic redox conditions, and providing insights onhow the iron (Fe) cycle was operating throughout key periods of Earth’s hist…
View article: Chemical extraction of iron from carbonate in banded iron formations for isotope analysis
Chemical extraction of iron from carbonate in banded iron formations for isotope analysis Open
View article: The absence of an effect of nickel on iron isotope fractionation during core formation
The absence of an effect of nickel on iron isotope fractionation during core formation Open
View article: Unraveling one billion years of geological evolution of the southeastern Amazonia Craton from detrital zircon analyses
Unraveling one billion years of geological evolution of the southeastern Amazonia Craton from detrital zircon analyses Open
View article: Anoxygenic photosynthesis linked to Neoarchean iron formations in Carajás (Brazil)
Anoxygenic photosynthesis linked to Neoarchean iron formations in Carajás (Brazil) Open
Microbial activity is often invoked as a direct or indirect contributor to the precipitation of ancient chemical sedimentary rocks such as Precambrian iron formations (IFs). Determining a specific metabolic pathway from the geological reco…
View article: Stratigraphy and geochronological constraints of the Serra Sul Formation (Carajás Basin, Amazonian Craton, Brazil)
Stratigraphy and geochronological constraints of the Serra Sul Formation (Carajás Basin, Amazonian Craton, Brazil) Open
View article: Carbon cycle instability and orbital forcing during the Middle Eocene Climatic Optimum
Carbon cycle instability and orbital forcing during the Middle Eocene Climatic Optimum Open
View article: Diagenetic Fate of Biogenic Soft and Hard Magnetite in Chemically Stratified Sedimentary Environments of Mamanguá Ría, Brazil
Diagenetic Fate of Biogenic Soft and Hard Magnetite in Chemically Stratified Sedimentary Environments of Mamanguá Ría, Brazil Open
Magnetotactic bacteria (MTB) synthesize magnetite and greigite crystals under low oxygen conditions in the water column or uppermost sediment (greigite‐producing bacteria are found below the oxic‐anoxic transition). Dissolved iron and oxyg…
View article: Mineralogical evidence for warm and dry climatic conditions in the Neo-Tethys (eastern Turkey) during the middle Eocene
Mineralogical evidence for warm and dry climatic conditions in the Neo-Tethys (eastern Turkey) during the middle Eocene Open
View article: Variation of minerals and clay minerals recorded in the Neo-Tethys (central Turkey): new evidence of climatic changes during the middle Eocene
Variation of minerals and clay minerals recorded in the Neo-Tethys (central Turkey): new evidence of climatic changes during the middle Eocene Open
\n Minerals and clay minerals in continental sedimentary successions are valuable tools for reconstructing past environmental conditions. Given the state of preservation of clays minerals, it is possible to identify how they were formed, p…
View article: High-resolution integrated magnetobiostratigraphy of a new middle Eocene section from the Neotethys (Elazığ Basin, eastern Turkey)
High-resolution integrated magnetobiostratigraphy of a new middle Eocene section from the Neotethys (Elazığ Basin, eastern Turkey) Open
The progressive closure of the Neotethys Ocean had a profound impact on the oceanclimate system during the Cenozoic. In this perspective, Turkey represents a key area for studying the climate evolution during the Eocene, because it was loc…
View article: New mineralogical and geochemical evidence for the Middle Eocene Climatic Optimum (MECO) in the Neo-Tethys (central Turkey)
New mineralogical and geochemical evidence for the Middle Eocene Climatic Optimum (MECO) in the Neo-Tethys (central Turkey) Open