Results 101 to 110 of about 552,470 (226)

Modern arc-like water content in the source of 3.1-billion-year-old volcanic rocks

Nature Communications
Whether Archean arc-like volcanism reflects subduction remains debated. We present high-resolution geochemical data from a well-preserved 3.13-3.10 Ga arc-like volcanic succession in Australia’s Pilbara Craton, a rare Archean analog of modern arc ...
Eric D. Vandenburg, Oliver Nebel, R. Hugh Smithies, Peter A. Cawood, Laura A. Miller, Marc-Alban Millet, Fabio A. Capitanio   +6 more
doaj   +1 more source

Partially melted low velocity zones reveal an active upper mantle beneath Elysium Planitia, Mars

Nature Communications
The current state of Mars’s interior is fundamental to understanding its thermal evolution, volcanic history, and potential habitability. While global-scale magmatism has declined since the Amazonian epoch, recent volcanism and concentrated seismicity in
Mingwei Dai, Daoyuan Sun, Chenyang Zhao, Zhu Mao, Ningyu Sun, Huixing Bi   +5 more
doaj   +1 more source

Hydrous multi-stage mantle melting controls gold enrichment in mafic Kermadec arc magmas

Communications Earth & Environment
Many exceptionally Au-rich deposits are associated with subduction zones and Au-rich magmas. However, the origin of Au enrichment in arc magmas remains controversial.
Christian Timm, Maxim Portnyagin, Cornel E. J. de Ronde, Mark D. Hannington, Dieter Garbe-Schönberg, Kaj Hoernle, Philipp A. Brandl, Dan Layton-Matthews, Matthew Leybourne, Nadezhda M. Sushchevskaya, Rex N. Taylor, Richard J. Arculus   +11 more
doaj   +1 more source

Petrogenesis and Au-PGE distribution in continental peridotites from the Adamawa Plateau, Cameroon Volcanic Line: Insights from petrography and geochemistry

Results in Earth Sciences
The main aim of this paper is to examine the petrogenetic processes controlling the distribution of gold and platinum group elements (Au-PGEs). Au-PGE contents were measured using NiS fire assay combined with inductively coupled plasma mass spectrometry.
Elisé Sababa, Franck K. Djokgoue Yonga, Abaitouin Guiswe, Paul-Désiré Ndjigui   +3 more
doaj   +1 more source

Total synthesis and structural characterization of a novel protein scaffold from the snail Biomphalaria glabrata

Protein Science, Volume 35, Issue 9, September 2026.
Abstract Disulfide‐rich miniproteins constitute compact and highly stable scaffolds of growing interest for molecular and structural engineering. Schistosomins are ~80‐residue proteins conserved across gastropods that form a long‐standing orphan family whose structure and biological roles have remained unknown.
Oleg Melnyk, Stéphanie Caby, Armelle Vigouroux, Christine Demanche, Rémi Desmet, Magalie Sénéchal, Benoît Snella, Alexandra Mougel, Céline Boidin‐Wichlacz, Aurélie Parmentier, Ugo Pasco, Sonia Cantel, Solange Moréra, Jérôme Vicogne   +13 more
wiley   +1 more source

Effects of Body Size and Environmental Region on the Nutritional Value of Small Pelagic Species in the California Current

Fisheries Oceanography, Volume 35, Issue 5, Page 722-736, September 2026.
ABSTRACT We evaluated the effects of regional environment and body size on the nutritional traits of five small pelagic species differing in habitat use, feeding behavior, and importance as prey for top predators in the California Current Large Marine Ecosystem (CCLME).
Alana M. Krug‐MacLeod, Miram R. Gleiber, Elan J. Portner, C. Anela Choy, Elizabeth A. Daly, Natasha A. Hardy, Larry B. Crowder, Stephanie J. Green   +7 more
wiley   +1 more source

Resolving Micrometre‐Scale Zircon Growth in Silicic Systems by 7 μm LA‐MC‐ICP‐MS U‐Pb Dating: Linking Petrology and Geochronology in Silicic Volcanic and Granitic Rocks from Victoria, Australia

Geostandards and Geoanalytical Research, Volume 50, Issue 3, Page 625-647, September 2026.
Key Points 7 μm spot‐diameter LA‐MC‐ICP‐MS analyses yield accurate zircon U‐Pb ages. 1013 Ω amplifier resistors improve low‐signal Pb measurements. Saturn correction protocols minimise down‐hole fractionation effects. We present a systematic evaluation of high spatial‐resolution zircon U‐Pb dating using a Thermo Scientific Neoma multi‐collector ICP‐MS ...
Cristiano Lana, John D. Clemens
wiley   +1 more source

An Inflating Upper Mantle Magma Reservoir Beneath the Tip of the Condor Seamount, Azores Revealed by Rapid‐Response Ocean‐Bottom‐Seismometer Data

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Condor Seamount is among the most seismically active regions on the Azores Plateau. In December 2019, an earthquake crisis occurred at the tip of the seamount, which was strongly felt on nearby islands. Two months after the peak of the crisis, we deployed a local network of five ocean‐bottom seismometers around the seamount, recording ...
Yingchen Liu, Neil Mitchell, Dietrich Lange, Ingo Grevemeyer   +3 more
wiley   +1 more source

Origin of Long‐Wavelength Variations in Crustal Thickness on Rocky Planets

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Long‐wavelength crustal thickness variations are observed on telluric planets, particularly on Mars and the Moon whereas Mercury appears to lack such variations. They may stem from two early‐stage positive feedback mechanisms that can emerge in stagnant‐lid planets.
Valentin Bonnet Gibet, Chloé Michaut
wiley   +1 more source

High Melt Fraction Induced by the Dehydration Melting Near the 410‐km Discontinuity

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract The water‐rich mantle transition zone, coupled with the low water storage capacity of the upper mantle, suggests that dehydration melting occurs just above the mantle transition zone near the 410‐km discontinuity. However, the melt fraction produced by the dehydration melting process remains poorly constrained.
Juan Chen, Hongyu Yu, Suyu Fu, Fang Xu, Baohua Zhang, Hongzhan Fei   +5 more
wiley   +1 more source