Results 51 to 60 of about 28,419 (225)

Voluminous magma formation for the 30-ka Aira caldera-forming eruption in SW Japan: contributions of crust-derived felsic and mafic magmas

Frontiers in Earth Science
Understanding the origin, assembly, and evolution of voluminous magma that erupts in catastrophic caldera-forming eruptions (CCFEs) is a community imperative. A CCFE of the Aira caldera at 30 ka discharged over 350 km3 of magma, which can be grouped into
Ayumu Nishihara, Ayumu Nishihara, Ayumu Nishihara, Yoshiyuki Tatsumi, Katsuya Kaneko, Jun-Ichi Kimura, Qing Chang, Nobuo Geshi, Takashi Miyazaki, Bogdan Stefanov Vaglarov, Hironobu Hinata, Keiko Suzuki-Kamata   +11 more
doaj   +1 more source

AgeSpectraAnalyst: A MATLAB based package to model zircon age distributions in silicic magmatic systems

MethodsX, 2023
In the last decade, improvements in the analytical precision achievable by zircon U-Pb geochronological techniques have allowed to resolve complexities of zircon crystallization histories in magmatic rocks to an unprecedented level.
Lorenzo Tavazzani, Jörn-Frederik Wotzlaw, Rita Economos, Dawid Szymanowski, Oscar Laurent, Olivier Bachmann, Cyril Chelle-Michou   +6 more
doaj   +1 more source

Monocytes with trained immunity–like signatures are associated with acute anterior uveitis in ankylosing spondylitis

Interdisciplinary Medicine, EarlyView.
In ankylosing spondylitis‐acute anterior uveitis (AS‐AAU), trained immunity monocytes (Mono‐TI) differentiate into macrophages in the eye, retaining trained immunity features. Mono‐TI cells secrete pro‐inflammatory cytokines and chemokines, including IL‐1β, TNF‐α, and CCL3.
Yimeng Sun, Lu Zhang, Xinyu Yao, Yunfei Liu, Xin Li, Feng Wen, Yong Dai, Ye Dai, Ziyu Du, Dijie Qiao, Ziwei Meng, Cong Hu, Chun Yan, Wei Chi   +13 more
wiley   +1 more source

The Capability of Amphibole in Tracing the Physicochemical Processes of Magma Mixing

Geophysical Research Letters
This study explores the capability of amphibole in tracing the physicochemical process of magma mixing through spatially associated gabbros, mafic microgranular enclaves (MMEs) and granodiorites from central Tibet.
Mingjian Li, Yunchuan Zeng, Massimo Tiepolo, Jifeng Xu, Enrico Cannaò, Francesca Forni, Feng Huang   +6 more
doaj   +1 more source

Rapid Assembly and Eruption of a Shallow Silicic Magma Reservoir, Reyðarártindur Pluton, Southeast Iceland

Geochemistry, Geophysics, Geosystems, 2021
Although it is widely accepted that shallow silicic magma reservoirs exist, and can feed eruptions, their dynamics and longevity are a topic of debate. Here, we use field mapping, geochemistry, 3D pluton reconstruction and a thermal model to investigate ...
E. L. Rhodes, A. K. Barker, S. Burchardt, C. F. Hieronymus, S. N. Rousku, D. W. McGarvie, T. Mattsson, T. Schmiedel, E. Ronchin, T. Witcher   +9 more
doaj   +1 more source

Oxygen isotope geochemistry of the second HSDP core [PDF]

, 2003
Oxygen isotope ratios were measured in olivine phenocrysts (~1 mm diameter), olivine microphenocrysts (generally ~100–200 µm diameter), glass, and/or matrix from 89 samples collected from depths down to 3079.7 m in the second, and main, HSDP core (HSDP-2)
Eiler, John M., Kitchen, Nami E., Wang, Zhengrong   +2 more
core   +1 more source

Peixe Zircon as a Quality Control Reference Material in U‐Pb Geochronology by LA‐ICP‐MS

Geostandards and Geoanalytical Research, EarlyView.
Key Points Peixe#0 zircon was characterised for U‐Pb geochronology using CA‐ID‐TIMS, SIMS and a long‐term LA‐ICP‐MS data set. The consistent results establish Peixe#0 as a reference material for U‐Pb quality control. Trace element heterogeneity requires careful, CL‐guided spot selection.
Margareth Sugano Navarro, Erica Martini Tonetto, Elson P. Oliveira, Mauricio Ibañez‐Mejia, Cristina Talavera, Neal J. McNaughton, Jacinta Enzweiler, Michael Wiedenbeck   +7 more
wiley   +1 more source

High-Performance Computing of 3D Magma Dynamics, and Comparison With 2D Simulation Results

Frontiers in Earth Science, 2022
The dynamics of magma is often studied through 2D numerical simulations because 3D simulations are usually complex and computationally expensive. However, magmatic systems and physical processes are 3D and approximating them in 2D requires an evaluation ...
Deepak Garg, Paolo Papale
doaj   +1 more source

Petrography and mineral chemistry of Northeast Africa 053—A remnant of Martian crystal mush

Meteoritics &Planetary Science, EarlyView.
Abstract In Earth's igneous systems, crystal mushes, crystal‐rich frameworks permeated by silicate melt, represent a common and fundamental stage in the evolution of magma bodies. However, whether crystal mushes occur within Martian igneous systems and play a comparable role is unknown. Here, we present a comprehensive petrography and mineral chemistry
Xhonatan Shehaj, Eleonora Ammannito, Giovanni Pratesi   +2 more
wiley   +1 more source

Magma Plumbing System at Izu-Oshima Volcano, Japan: Constraints From Petrological and Geochemical Analyses

Frontiers in Earth Science, 2018
The Izu-Oshima volcano is one of the most active volcanoes in Japan, and has generated relatively large-scale eruptions every 30–40 years for the past 200 years.
Takeshi Kuritani, Takeshi Kuritani, Azusa Yamaguchi, Sayuki Fukumitsu, Mitsuhiro Nakagawa, Akiko Matsumoto, Tetsuya Yokoyama   +6 more
doaj   +1 more source