Article
Geochemistry & Geophysics
Hao Wang, Wenjiao Xiao, Brian F. Windley, Qian W. L. Zhang, Zhou Tan, Chunming Wu, Mengyan Shi
Summary: Subduction zones play a crucial role in reconstructing tectonic configurations and convergent geodynamics. In this study, new petrologic and geochronologic data were used to reveal the complex metamorphic structure and history of the subduction-exhumation channel in the Dunhuang area of China. The findings provide important insights into the reconstructions of proto-Asia and subduction dynamics.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geology
Regiane Andrade Fumes, George Luiz Luvizotto, Renato Moraes, Pierre Lanari, Claudio de Morisson Valeriano, Thomas Zack, Mark J. Caddick, Luiz Sergio Amarante Simoes
Summary: By using a combination of in situ techniques, the study assesses the P-T-t path of high-pressure granulites from the Southern Brasilia Orogen. The results provide insights into the crystallization conditions and metamorphic history, indicating peak pressure occurred around 635 Ma with later retrograde conditions and cooling stages.
JOURNAL OF METAMORPHIC GEOLOGY
(2022)
Letter
Geosciences, Multidisciplinary
Paul Green, Ian Duddy, Peter Japsen
Summary: We appreciate Lovell's comments on our paper, which discusses events involving the deposition and removal of kilometer-scale thicknesses, leading to the phenomenon of missing sections. Lovell suggests that these events can be explained by mantle convection and dynamic topography, based on examples of domal uplifts representing dynamically supported swells. However, the examples provided by Lovell do not accurately replicate the events described in Green et al. (2022), which involve burial and exhumation over vast distances and multiple episodes. Therefore, the underlying mechanisms of these events remain elusive.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Maria Di Rosa, E. Sanita, C. Frassi, J. M. Lardeaux, M. Corsini, M. Marroni, L. Pandolfi
Summary: This study presents the first P-T-d-t path for the Alpine Corsica's Lower Units, specifically the Tenda Massif representing fragments of the European continental margin involved in the east-dipping Alpine subduction. New thermobarometric data and 40Ar/39Ar dating of syn-kinematic muscovite were used to determine the P-T conditions and age of metamorphism of the Venaco Unit in Alpine Corsica's southernmost sector. The results show that the Venaco Unit reached its maximum pressure at approximately 33 km depth, and was later exhumed to a shallower level at around 26 km depth during the Priabonian period, suggesting fast exhumation unlike the stationary Tenda Massif.
GEOLOGICAL JOURNAL
(2023)
Article
Geochemistry & Geophysics
Liang-Peng Deng, Yi-Can Liu, Chiara Groppo, Franco Rolfo, Yang Yang, Xiao-Feng Gu, An-Dong Wang
Summary: Deciphering the P-T-t path of ultrahigh-pressure rocks is crucial for reconstructing the evolution of continental crustal terranes involved in very deep subduction followed by exhumation. This study focuses on the migmatitic North Dabie complex Zone (NDZ) in the Dabie-Sulu orogenic belt of central-eastern China, integrating P-T pseudosection modeling, geothermometry, zircon U-Pb dating, and trace element analysis to constrain the ages and metamorphic stages of the eclogites in the NDZ. The results provide new P-T-t estimates and age data, contributing to precisely reconstruct the whole P-T-t path of the NDZ.
Article
Geosciences, Multidisciplinary
Soenke Brandt, Reiner Klemd, Hanqiang Xie, Patrick Bobek
Summary: The Epupa Complex in northern Namibia is part of the Archean Congo Craton and recent studies reveal the poorly-known Paleoproterozoic to Mesoproterozoic evolution of this area. New petrological and geochronological data show three distinct high-grade metamorphic events in the metasedimentary migmatites, with the oldest event around 1740-1720 Ma. These events indicate a change in the geotectonic position of the Epupa Complex over time.
AMERICAN JOURNAL OF SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Sachin Kumar, Santigopal Samanta, Shiv Brat Singh
Summary: The influence of chemical heterogeneity on martensite transformation and retained austenite stability was investigated. The results showed that the retained austenite in the spheroidized material has better stability.
MATERIALS CHARACTERIZATION
(2022)
Article
Geochemistry & Geophysics
Oleg G. Safonov, Vasily O. Yapaskurt, Marlina A. Elburg, Dirk D. van Reenen, H. M. Rajesh, C. Andre Smit, Alexei L. Perchuk, Valentina G. Butvina
Summary: The study investigates the exhumation history of a metapelitic granulite within the Ha-Tshanzi structure from the Central Zone of the Limpopo high-grade Complex in South Africa. The research reveals the coexistence of garnet, biotite, plagioclase, quartz, and sillimanite with melt during the sub-isothermal exhumation process. The metamorphic evolution was overprinted by the Paleoproterozoic event at approximately 2.01 Ga.
JOURNAL OF PETROLOGY
(2021)
Article
Materials Science, Multidisciplinary
Huixing Li, Jeffrey Venezuela, Qingjun Zhou, Zhiming Shi, Ming Yan, Ruth Knibbe, Mingxing Zhang, Futao Dong, Andrej Atrens
Summary: This study investigated the influence of shearing prestrain on hydrogen embrittlement. The results showed that the strength and ductility values were similar to those in air before hydrogen precharging in tensile testing, but the ductility decreased significantly during in-situ hydrogen charging due to intergranular fracture initiation on the specimen surface. In contrast, there was a significant decrease in ductility for the hydrogen precharged steel after prestrain. The hydrogen-facilitated fracture was transgranular, and it grew through fracture tip blunting, new fracture initiation, and coalescence, which was consistent with a hydrogen enhanced localized plasticity (HELP) mechanism.
Article
Geosciences, Multidisciplinary
Rafael G. Motta, Ian C. W. Fitzsimons, Renato Moraes, Tim E. Johnson, Sheila Schuindt, Beatriz Y. Benetti
Summary: Through various methods, this study constrained the pressure-temperature-time history of granulites from the Socorro-Guaxupe Nappe in Southern Brasilia Orogen, revealing a protracted regional metamorphic event lasting over 30 million years during the collision and assembly of West Gondwana.
PRECAMBRIAN RESEARCH
(2021)
Article
Engineering, Environmental
Xiaoyang Liu, Changming Wang, Hailiang Liu, Di Wu, Heran Yang, Zhimin Zhang, Shengwu Qin
Summary: This study comprehensively investigates the chemical composition and physical and mechanical properties of volcanic soil in eastern Jilin, China. The results show that volcanic soil exhibits different characteristics in terms of grain size, with coarse-grain volcanic soil showing softening behavior and fine-grain volcanic soil displaying both softening and hardening behavior at different confining pressure levels. The shear strength of volcanic soil is influenced by the interlocking and friction effects among soil grains.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Ao Su, Honghan Chen, Yue-xing Feng, Jian-xin Zhao, Zecheng Wang
Summary: A recent gas discovery in the late Ediacaran dolomites of the Sichuan Basin provides insight into the formation and preservation of ancient petroleum systems. By evaluating fluid inclusions, researchers identified three distinct generations of gas-bearing fluid assemblages, indicating the rearrangement of gases during the formation of oil. The study also revealed clear processes of oil and gas generation during the late Jurassic to late Cretaceous.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Multidisciplinary Sciences
I-M Launonen, N. Lyytikainen, J. Casado, E. A. Anttila, A. Szabo, U-M Haltia, C. A. Jacobson, J. R. Lin, Z. Maliga, B. E. Howitt, K. C. Strickland, S. Santagata, K. Elias, A. D. D'Andrea, P. A. Konstantinopoulos, P. K. Sorger, A. Farkkila
Summary: In this study, the authors used highly multiplexed imaging to analyze the immune microenvironment of high-grade serous ovarian cancers (HGSOC) and identified phenotypic characteristics and spatial interactions associated with BRCA1/2 gene mutations. These findings have important implications for improving immunotherapeutic strategies and patient stratification.
NATURE COMMUNICATIONS
(2022)
Article
Geology
Gisella Rebay, Roger Powell, Tim J. B. Holland
Summary: The metamorphic evolution of serpentinite plays a crucial role in the geochemical cycles, mechanical behavior, and seismic properties of the Earth. The phase equilibria in the MgO-Al2O3-SiO2-H2O (MASH) system serve as a foundation for studying larger systems that are applicable to serpentinites and whiteschists. By calculating phase equilibria and utilizing activity-composition relations, the influence of pressure, temperature, and composition on equilibrium mineral assemblages in these chemical systems at high pressure can be understood.
JOURNAL OF METAMORPHIC GEOLOGY
(2022)
Review
Oncology
Claire A. Conarroe, Timothy N. J. Bullock
Summary: High-grade gliomas are malignant brain tumors, and despite the use of immunotherapies, patient outcomes remain poor. Dendritic cells (DC) play a crucial role in initiating an immune response against tumors, but research on their activity in high-grade gliomas is lacking. This review discusses the role of DC in the central nervous system, their infiltration in high-grade gliomas, antigen presentation, immunogenicity, and subsets involved in the antitumor immune response. It also explores the implications of suboptimal DC function in immunotherapies and opportunities for optimization in treating high-grade gliomas.
Article
Geology
Deborah Lo Po, Roberto Braga, Hans-Joachim Massonne, Giancarlo Molli, Alessandra Montanini, Giuseppe M. Bargossi
JOURNAL OF METAMORPHIC GEOLOGY
(2018)
Article
Environmental Sciences
V Funari, L. Mantovani, L. Vigliotti, M. Tribaudino, E. Dinelli, R. Braga
SCIENCE OF THE TOTAL ENVIRONMENT
(2018)
Article
Geochemistry & Geophysics
Dominik Gudelius, Sonja Aulbach, Roberto Braga, Heidi E. Hoefer, Alan B. Woodland, Axel Gerdes
JOURNAL OF PETROLOGY
(2019)
Article
Geology
Andrea Agangi, Steven M. Reddy, Diana Plavsa, Denis Fougerouse, Chris Clark, Malcolm Roberts, Tim E. Johnson
ORE GEOLOGY REVIEWS
(2019)
Article
Geochemistry & Geophysics
Giulia Consuma, Roberto Braga, Tommaso Giovanardi, Danilo Bersani, Jurgen Konzett, Federico Lugli, Maurizio Mazzucchelli, Peter Tropper
Review
Engineering, Environmental
Michal Syc, Franz Georg Simon, Jiri Hyks, Roberto Braga, Laura Biganzoli, Giulia Costa, Valerio Funari, Mario Grosso
JOURNAL OF HAZARDOUS MATERIALS
(2020)
Article
Geochemistry & Geophysics
Deborah Lo Po, Roberto Braga, Peter Tropper, Jurgen Konzett, Volkmar Mair, Giuseppe Maria Bargossi
Article
Engineering, Environmental
Lederer Jakob, Syc Michal, Simon Franz-Georg, Quina Margarida, Hyks Jiri, Huber Florian, Funari Valerio, Fellner Johann, Braga Roberto, Bontempi Elza, Bogush Anna, Blasenbauer Dominik
Article
Geosciences, Multidisciplinary
J. A. McDivitt, S. G. Hagemann, N. Thebaud, M. P. Roberts
Summary: This study investigates the timing of metamorphism in the Kalgoorlie gold camp and supports a key aspect of gold mineralisation models. The examination of actinolite-chlorite crenulation cleavage in the Hannan's Lake Serpentinite suggests a syn-D-1 timing for peak metamorphism and a post-peak timing for the Fimiston and Oroya Au-Te lodes. Additionally, the study questions the assumptions about the equivalence of the Fimiston and Oroya Au-Te lodes to other examples of metamorphosed, epithermal-type mineralisation in orogenic belts in intrusion-related models.
AUSTRALIAN JOURNAL OF EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
Giulia Consuma, Sonja Aulbach, Roberto Braga, Laure A. J. Martin, Peter Tropper, Axel Gerdes, Marco L. Fiorentini
Summary: This study investigates the role of sulfate as a vector for the mobilization of oxidized components in the subduction zones, based on the examination of orogenic spinel and garnet peridotite lenses from the Ulten Zone in the Eastern Alps of Italy. The research reveals the influence of multiple C-O-H-S-bearing fluids and melts on the peridotites during their metamorphic evolution. The findings suggest limited interaction with isotopically heavy crustal fluids and indicate a subordinate role of subduction-derived sulfate in the extended fluid/rock evolution of the Ulten Zone peridotites.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Antonella Cornelio, Alessandra Zanoletti, Roberto Braga, Laura Eleonora Depero, Elza Bontempi
Summary: This study focuses on the characterization and evaluation of adsorption capability of porous materials synthesized using alginates and industrial by-products, with hydrogen peroxide as a pore former. Comparison is made with a reference material, SUNSPACE hybrid material, and sustainability is evaluated in terms of Embodied Energy and Carbon Footprint. Adsorption tests show that the material made with bottom ash performs the best.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Sara Kasmaeeyazdi, Enrico Dinelli, Roberto Braga
Summary: Abandoned mining wastes pose both environmental challenges and potential secondary raw material sources. In this study, Sentinel-2 satellite images were combined with geochemical samples to map the distribution of iron, copper, chromium, and cobalt in the Vigonzano mining wastes in Italy. The concentration maps revealed areas of enrichment and depletion for different elements within the mining wastes.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
Erwin Schettino, Jose Maria Gonzalez-Jimenez, Claudio Marchesi, Francesco Palozza, Idael F. Blanco-Quintero, Fernando Gervilla, Roberto Braga, Carlos J. Garrido, Marco Fiorentini
Summary: The traditional model of chalcophile metal transfer across the continental lithosphere has been proven to be inaccurate. Petrographic characteristics and numerical calculations support the theory that sulfide droplets mechanically carry metals from the mantle to the crust. High-resolution transmission electron microscopy observations reveal galena nanoinclusions in sulfide droplets, indicating that metals are transported mechanically through immiscible nanomelts from the mantle to the crust.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Mara Luiza Barros Pita Rocha, Farid Chemale Junior, Joao Orestes Schneider Santos, Marcia Aparecida de Sant'Ana Barros, Francisco Egidio Cavalcante Pinho, Neal Jesse McNaughton, Paulo Cesar Correa da Costa, Malcolm Roberts
BRAZILIAN JOURNAL OF GEOLOGY
(2020)
Article
Geosciences, Multidisciplinary
Javier Elio, Giorgia Cinelli, Peter Bossew, Jose Luis Gutierrez-Villanueya, Tore Tollefsen, Marc De Corte, Alessio Nogarotto, Roberto Braga
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
(2019)