Simone Bernardini
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The <i>Tubotomaculum</i> Enigma and the Rise of Benthic Life During the Opening of the Western Mediterranean Basin Open
Large‐scale geological processes shape microbial habitats and drive the evolution of life on Earth. During the Oligocene, convergence between Africa and Europe led to the opening of the Western Mediterranean Basin, a deep‐ocean system char…
The oxidation of Fe in riebeckite at 0.7 GPa Open
At high temperatures, riebeckite, ideally Na2(Fe32+Fe23+)Si8O22(OH)2, undergoes significant crystal-chemical rearrangement in response to the following reaction: Fe2+ + OH− → Fe3+ + O2− + e− + H+, leading to the development of charge carri…
The Stability of Manganese Oxides Under Laser Irradiation During Raman Analyses: II. Layer Structures Open
Manganese oxides (MnOx) are primary components of marine polymetallic deposits, which represent strategic reservoirs for critical metals essential for the transition to sustainable energy (including lithium, cobalt, and tellurium). Due to …
View article: The effect of anisotropic electrical conductivity of amphiboles on geophysical anomalies observed in subduction zones
The effect of anisotropic electrical conductivity of amphiboles on geophysical anomalies observed in subduction zones Open
Electrical-conductivity anomalies in subduction zones are believed to be strongly connected with global water cycling, volcanism and seismicity. However, the causal atomic-scale processes related to conductivity of rock-forming minerals in…
The Stability of Manganese Oxides Under Laser Irradiation During Raman Analyses: I. Compact Versus Channel Structures Open
Manganese oxides/oxyhydroxides (MnOx) are based on Mn n+ O 6 and Mn n+ O 4 polyhedra arranged such as to form compact, channel or layered structures. In geology, they are precious archives of past redox conditions for palaeoclimatic recons…
A multi‐analytical investigation of Imperial (I‐II century AD) Roman cooking ware from ‘Villa della Piscina’ and the so called ‘Minerva Medica Temple’ (Rome, Italy) Open
A multi‐analytical approach based on colourimetry, micro‐Raman spectroscopy, scanning electron microscopy, optical microscopy and powder X‐ray diffraction, has been applied to investigate Roman cooking ware samples dating back to imperial …
Tracking the Ti4+ substitution in phlogopite by spectroscopic imaging: A tool for unravelling the growth of micas at HP-HT conditions Open
Phlogopite solid-solutions have a wide pressure–temperature (P-T) stability field and are ubiquitous in a wide variety of geological settings, from deep lithosphere magmatic environments to upper crust metamorphic domains. Phlogopite compo…
View article: The effect of A-site cations on charge-carrier mobility in Fe-rich amphiboles
The effect of A-site cations on charge-carrier mobility in Fe-rich amphiboles Open
Elucidating the high-temperature behavior of rock-forming minerals such as amphiboles (AB2C5 T8O22W2) is critical for the understanding of large-scale geological processes in the lithosphere and, in particular, the development of high cond…
View article: In situ simultaneous Fe K-edge XAS spectroscopy and resistivity measurements of riebeckite: Implications for anomalous electrical conductivity in subduction zones
In situ simultaneous Fe K-edge XAS spectroscopy and resistivity measurements of riebeckite: Implications for anomalous electrical conductivity in subduction zones Open
In this paper, we address two key features of the behaviour of Fe-rich amphibole at high temperatures: (1) the Fe2+ → Fe3+ + e− exchange within the crystal bulk, and (2) the consequent rise in electrical conductivity. Cycling heating-cooli…
Micro-Raman mapping of critical metals (Li, Co, Ni) in a rhythmically laminated deep-ocean ferromanganese deposit Open
Deep-ocean ferromanganese deposits represent one of the most important strategic reservoirs for rare and critical metals. In particular, Mn-oxyhydroxides, such as asbolane and lithiophorite, concentrate large amounts of Li, Ni, and Co into…
Microlitter occurrence, distribution, and summertime transport trajectories in the coastal waters of the north-eastern Tyrrhenian Sea (Italy) Open
Coastal areas are extremely exposed to litter pollution. In this work, we assessed the abundance and distribution of microlitter in the water column and surface waters, as well as its summertime transport trajectories in the northern Latiu…
View article: Polarons in Rock-Forming Minerals: Physical Implications
Polarons in Rock-Forming Minerals: Physical Implications Open
The existence of thermally-activated quasiparticles in amphiboles is an important issue, as amphiboles are among the main hydrous complex silicate minerals in the Earth’s lithosphere. The amphibole structure consists of stripes of 6-member…
Electron-phonon coupling in amphiboles contributes to the anomalous conductivity in subduction zones Open
Anomalous high-conductivity layers (HCL) are typical of subduction zones, the largest recycling systems of our planet. Understanding the underlying physics of rock high conductivity has paramount implications for several planetary-scale pr…
View article: Morpho-Mineralogical and Bio-Geochemical Description of Cave Manganese Stromatolite-Like Patinas (Grotta del Cervo, Central Italy) and Hints on Their Paleohydrological-Driven Genesis
Morpho-Mineralogical and Bio-Geochemical Description of Cave Manganese Stromatolite-Like Patinas (Grotta del Cervo, Central Italy) and Hints on Their Paleohydrological-Driven Genesis Open
Caves are dark subsurface environments with relatively constant temperatures that allow studying bio-mineralization processes and paleoenvironmental or climate changes in optimal conditions. In the extreme and oligotrophic cave environment…
Abyssal oceanic circulation and acidification during the Middle Eocene Climatic Optimum (MECO) Open
The Middle Eocene Climatic Optimum (MECO) is a global warming event that occurred at around 40 Ma and lasted about 500 kyr. We study this event in an abyssal setting of the Tasman Sea, using the IODP Core U1511B-16R, collected during the e…
Raman spectroscopy and laser-induced degradation of groutellite and ramsdellite, two cathode materials of technological interest Open
Raman spectra of groutellite and ramsdellite were provided and the thermal stability under the laser beam was investigated. Raman mapping allows the study of their distribution, which play a key-role in electrochemical activity of these co…