Article
Geography, Physical
Ivan Razum, Nikolina Ilijanic, Maurizio Petrelli, Vera Pawlowsky-Glahn, Slobodan Miko, Piotr Moska, Biagio Giaccio
Summary: Tephrostratigraphic correlations rely on geochemical composition and additional constraints, but in cases where additional data is not available, the statistical treatment of geochemical data provides a viable approach. This study successfully correlated two poorly constrained late Pleistocene tephra using only geochemical data, which resulted in new insights into the distribution and chronology of volcanic eruptions in the eastern Adriatic region. The use of compositional analysis proved to be more reliable than raw data.
QUATERNARY GEOCHRONOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Maurizio Petrelli, Monica agreda Lopez, Alessandro Pisello, Diego Perugini
Summary: In this article, we review the pre-eruptive dynamics and evidence of open-system behavior in the volcanic plumbing system beneath Campi Flegrei Caldera. We also estimate the magma residence time, ascent velocity, and mixing-to-eruption timescales. The results show that open-system dynamics are ubiquitous in the volcanic deposits of the past 40,000 years. Additionally, we propose a trans-crustal magmatic feeding system with a main storage reservoir at 9 km, which interacts with shallow reservoirs at 2-4 km. We also provide new insights into the timescales of magma ascent and mixing to eruption, with explosive eruptions potentially occurring with little warning.
EARTH PLANETS AND SPACE
(2023)
Article
Geochemistry & Geophysics
Marco Venier, Luca Ziberna, Francesco Princivalle, Maurizio Petrelli, Vanni Lughi, Alla Logvinova, Nikolay V. V. Sobolev, Gianluca Turco, Davide Lenaz
Summary: We analysed the chemistry of 42 Cr-spinels from Siberian kimberlites and found a wide range in Mg# and Cr# with a common trend of increasing Cr# with decreasing Mg#. The trace element analysis showed differences between spinels from peridotitic and kimberlitic sources. Simulation calculations were also performed to determine the composition of possible melts in equilibrium with Cr-spinels.
Article
Geochemistry & Geophysics
Samikshya Mohanty, Argyrios Papadopoulos, Maurizio Petrelli, Lambrini Papadopoulou, Debashish Sengupta
Summary: Zircon grains are commonly found in river banks and beach placers along the Indian east coast, with high abundances of Hf and Y elements compared to other trace elements. The study revealed that the abundance of uranium in zircon grains is larger than that of thorium. The geochemical characteristics of zircons in terms of REE content and Th/U ratio distinguish them from magmatic zircons. This study provides valuable information for determining the source region and assessing the resource potential and indigenous export.
Article
Geology
Christophe Real, Kathrin Fassmer, Rodolfo Carosi, Nikolaus Froitzheim, Daniela Rubatto, Chiara Groppo, Carsten Muenker, Simona Ferrando
Summary: This study reveals the important features and evolution history of the middle crust of the Adriatic Sea. By analyzing petrological and geochronological data, various tectonic and thermal events during the early stages of the Alpine rifting were found to be interconnected with the thinning and heating of the middle crust.
JOURNAL OF METAMORPHIC GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Omar Gianola, Benedetta Costa, Fabio Ferri, Mattia Gilio, Maurizio Petrelli, Mara Murri, Anna Barbaro, Matteo Alvaro, Andres Rodriguez-Vargas, Stefano Poli, Bernardo Cesare
Summary: Volcanic arcs above subduction zones are important locations for the formation and evolution of continental crust, with the Mercaderes-Rio Mayo area in Colombia being the only known locality where arclogitic xenoliths have been found. These xenoliths, entrained in the Granatifera Tuff, consist mainly of garnet, clinopyroxene, amphibole, plagioclase, scapolite, and accessory minerals. Melt inclusions are also present within these arclogites, providing strong evidence for their anatectic origin. The pressure and temperature conditions for the arclogites were estimated to be within the range of 1.6 to 1.9 GPa and 960℃ to 1150℃.
JOURNAL OF PETROLOGY
(2023)
Article
Geosciences, Multidisciplinary
Andrea Maffeis, Simona Ferrando, James Alexander Denis Connolly, Maria Luce Frezzotti, Daniele Castelli
Summary: Antigorite dehydration, especially in serpentinites, generates the highest amount of H2O among minerals and plays a significant role in the geochemical processes of mantle source and ore deposition. This study focuses on the redox effect of the carbonate-buffered antigorite dehydration reactions in metacarbonate sediments, and reveals the influence of P-T-fO(2) conditions on fluid geochemistry.
Review
Geography, Physical
Alessio Di Roberto, Giuseppe Re, Bianca Scateni, Maurizio Petrelli, Tommaso Tesi, Lucilla Capotondi, Caterina Morigi, Giacomo Galli, Ester Colizza, Romana Melis, Fiorenza Torricella, Patrizia Giordano, Federico Giglio, Andrea Gallerani, Karen Gariboldi
Summary: In this study, a tephrochronology analysis was conducted on a marine sediment core from Edisto Inlet, Ross Sea, Antarctica. The analysis revealed the presence of four cryptotephra layers with detailed characteristics and geochemical compositions. The age model based on radiocarbon dating showed a correlation between the topmost cryptotephra layer and the historical eruption of Mount Rittmann in 1254 CE. Additionally, deeper cryptotephra layers were found to be from explosive eruptions of Mount Melbourne volcano during the 3rd and 4th centuries CE.
QUATERNARY SCIENCE ADVANCES
(2023)
Article
Geochemistry & Geophysics
Barbara Bonechi, Alessandro Fabbrizio, Cristina Perinelli, Mario Gaeta, Maurizio Petrelli
Summary: In this study, time-series experiments were conducted to determine the element partition coefficients between amphibole and silicate glass under high pressure and temperature conditions. The results provide insights into the crystallization process of amphibole and its implications for volcanic products.
AMERICAN MINERALOGIST
(2023)
Article
Multidisciplinary Sciences
S. Capriotti, L. Medeghini, Silvano Mignardi, M. Petrelli, Michela Botticelli
Summary: This research aims to differentiate the various sources of azurite exploited in antiquity based on the study of minor and trace elements. Azurite is one of the most important blue pigments in art history, but little research has been done on its provenance. Therefore, it is still not possible to clearly identify the sources of azurite exploited in the past.
Article
Geosciences, Multidisciplinary
Alessandro Musu, Rosa Anna Corsaro, Oliver Higgins, Corin Jorgenson, Maurizio Petrelli, Luca Caricchi
Summary: The South-East Crater at Mt. Etna experienced a series of lava fountaining events from December 2020 to February 2022. The activity intensified from February to April 2021, with 17 paroxysmal events occurring during this period. The composition and texture of clinopyroxene crystals were analyzed to understand the temporal evolution of the magmatic system during this eruptive sequence.
BULLETIN OF VOLCANOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Jorge E. Romero, Eduardo Morgado, Alessandro Pisello, Felix Boschetty, Maurizio Petrelli, Francisco Caceres, Mohammad Ayaz Alam, Margherita Polacci, Jose L. Palma, Fabio Arzilli, Franco Vera, Romina Gutierrez, Daniele Morgavi
Summary: Villarrica, one of the most active and high-risk volcanoes in South America, experienced a sudden lava fountain eruption in 2015. This study conducted geochemical analysis of volcanic pyroclasts to reveal the changes in magma source and eruption mechanisms during different eruptive stages, providing significant insights for volcano monitoring and eruption forecasting.
BULLETIN OF VOLCANOLOGY
(2023)
Article
Environmental Sciences
Emily C. Bamber, Giuseppe La Spina, Fabio Arzilli, Mattia De' Michieli Vitturi, Margherita Polacci, Margaret E. Hartley, Maurizio Petrelli, Jonathan Fellowes, Mike Burton
Summary: This study quantifies the geochemistry and volatile concentrations of basaltic Plinian eruptions in Nicaragua and identifies the conditions conducive to such eruptions. It finds that a pre-eruptive temperature below 1100 degrees C and a total crystal content above 30 vol.% are the most favorable conditions for basaltic Plinian eruptions. The study also highlights the potential volcanic hazard posed by cooling, crystal-rich, large-volume basaltic magma bodies.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Environmental Sciences
Marco Giovanni Malusa, Enrico Brandmayr, Giuliano Francesco Panza, Fabio Romanelli, Simona Ferrando, Maria Luce Frezzotti
Summary: Researchers have studied the fate of carbon released during cold subduction by analyzing an unusually deep earthquake beneath Milan. They found that carbon-rich melts were present and may contribute to atmospheric carbon dioxide.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Geochemistry & Geophysics
Xinze Lu, Geoffrey J. Gilleaudeau, Brian Kendall
Summary: The Late Ordovician mass extinction is the first major extinction event in the Phanerozoic, but the reasons for the decline in global biodiversity before the extinction are not well understood.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2024)
Article
Geochemistry & Geophysics
Junyao Kang, Daniel D. Gregory, Benjamin Gill, Shiqiang Huang, Changxin Lai, Zhaoshan Chang, Huan Cui, Ivan Belousov, Shuhai Xiao
Summary: Sedimentary pyrite is an important geological archive, but it can be altered by diagenetic and hydrothermal processes. This study successfully trained machine learning algorithms to distinguish pyrite origins using trace element data. The approach was validated and applied to identify the origins of pyrite in two sedimentary successions in South China.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2024)