Results 161 to 170 of about 18,565 (272)

Vertical and Spatial Geochemical Variations of Nishinoshima Volcaniclastic Deposits, Japan, During Episode 4

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Nishinoshima is a volcanic island in the Ogasawara Arc that has exhibited intermittent activity since 2013, including four major eruptive episodes: 2013–2015 (Episode 1), 2017 (Episode 2), 2018 (Episode 3), and 2019–2020 (Episode 4). Previous studies reported a change in eruption style—from a Strombolian eruption with lava flows (Episode 1 to the early
Erika Tanaka, Kenta Yoshida, Tomoki Sato, Yoshiro Nishio, Yoshihiko Tamura   +4 more
wiley   +1 more source

Iron is an important influence of volcanic ash input on the evolution of deep-sea ecosystems. [PDF]

Microbiol Spectr
Bai S, Wang Z, Guo Y, Xu H, Li J, Peng X.   +5 more
europepmc   +1 more source

Effects of eruption plume processing on volcanic ash iron solubility and speciation: insights from high temperature gas-ash interaction experiments

, 2016
Volcanic ash deposition to seawater can alleviate the dissolved iron (Fe) deficiency that limits marine primary production in vast regions of the surface ocean.
Delmelle, Pierre, Maters, Elena, Ayris, Paul, Volcanic Ash as an Active Agent in the Earth System (VA3): Combining models and experiments   +3 more
core  

Geochemical and Isotopic Constraints on Long‐Lived Source Enrichment and Mantle Evolution in Paleoproterozoic Cratonic Lamprophyres

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The cratonic lithospheric mantle records complex metasomatic processes and is frequently tapped by alkaline magmatism, offering a unique opportunity to trace the progressive evolution of the mantle. In the present contribution, we investigate a newly identified calc‐alkaline lamprophyre field from the Neoarchean Jonnagiri Schist Belt, Eastern ...
Sourav Naskar, Rohit Pandey, Nils Björn Baumann, N. V. Chalapathi Rao, George Mathew, J. Amal Dev, J. K. Tomson   +6 more
wiley   +1 more source

A repository-hosted dataset of volcanic ash particle images and features. [PDF]

Sci Data
Benet D, Costa F, Migadel K, Lee DWJ, D'Oriano C, Pompilio M, Nurfiani D, Rifai H.   +7 more
europepmc   +1 more source

Characterization of a Vision-Based Tool for the Investigation of Geometric Characteristics of Ground-Deposited Volcanic Ash. [PDF]

Sensors (Basel), 2022
Andò B, Baglio S, Castorina S, Campisi A.   +3 more
europepmc   +1 more source

Rift Development, Tectonic Forcings, and Magmatic Feedbacks at Santorini and Kolumbo Volcanoes Constrained by Scientific Drilling and Core‐Seismic Integration

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract Volcanism in continental rifts, rifted volcanic arcs, and back‐arc basins is fundamentally coupled with crustal extension. However, the precise geometry and timing of the fault systems that facilitate magma transport and accommodate extension remain poorly constrained.
Jonas Preine, Christian Hübscher, Tim Druitt, Matthias Hartge, Abigail Metcalfe, Steffen Kutterolf, Katharina Pank, Jens Karstens, Paraskevi Nomikou, Masako Tominaga, Emilie Hooft, Beck Hufstetler, Kaisa Autumn, Gareth Crutchley, Maria B. Jover, Christian Berndt, Thomas A. Ronge, IODP Expedition 398 Scientists   +17 more
wiley   +1 more source

X-Ray micro-tomography unveils the internal features of volcanic ash aggregates. [PDF]

Commun Earth Environ
Gabellini P, Rossi E, Cioni R, Pistolesi M, Baumgartner LP, Bonadonna C.   +5 more
europepmc   +1 more source

Age of the Rotoehu Ash. Comment.

, 1995
Suggests that the article by Whitehead & Ditchburn (1994), although presenting useful new data on 230Th/232Th analyses, is flawed and misleading in suggesting that the Rotoiti Tephra is considerably younger than c.
Lowe, David J., Hogg, Alan G.
core  

Predictive Models for Postfire Debris Flow Initiation in the Southwest USA

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 6, June 2026.
Abstract Postfire debris flows pose a threat to life and infrastructure and significantly contribute to sediment supply in upland channels, thereby impacting water quality, stream habitats, and landscape evolution. Models designed to assess postfire debris‐flow likelihood at the watershed scale in response to design or forecast rainstorms are ...
Ana Isabel Fernandez Sirgo, Luke A. McGuire, Ann M. Youberg, Tao Liu   +3 more
wiley   +1 more source