Results 181 to 190 of about 1,983 (261)

Tracing Continental Basalt Sources and Mantle Processes Using Fe Stable Isotopes

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract Iron (Fe) isotopes have emerged as powerful tracers of mantle source heterogeneity and melting processes, yet the mechanisms producing heavy Fe isotope signatures (high δ57Fe values) in intraplate basalts remain debated. Competing interpretations include partial melting of recycled pyroxenite domains versus carbonate‐induced oxidation of a ...
Yi‐Shan Cheng, Jian‐Qiang Liu, Li‐Hui Chen, Xun Yu, Gang Zeng, Xiao‐Jun Wang, Zhao‐Yang He, Jian Zhao, Frances M. Deegan, Valentin R. Troll, Hong‐Fu Zhang   +10 more
wiley   +1 more source

Volcanic forcing of the Lomagundi-Jatuli carbon isotope excursion. [PDF]

Proc Natl Acad Sci U S A
Blichert-Toft J, Konhauser K, Coutret B, Pinto M, Agranier A, El Albani A, Albarède F.   +6 more
europepmc   +1 more source

Petrogenesis and Tectonic Evolution of Cenozoic Magmatism in the Southernmost Northern Andes: Insights From Zircon Petrochronology

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract This study integrates new zircon U–Pb ages, zircon εHf(t)–δ18O isotopic data, and whole‐rock geochemistry to refine the temporal and spatial framework of magmatism in the southern Northern Andes (SNA) from ∼65 to 6 Ma. The San Lucas, Catamayo, Portachuela, and Gonzanamá batholiths and magmatic suites, along with Late Miocene plutons, display ...
J. Iglesias, C. Witt, L. C. Sandoval Espinel, M. Zattin, M. Poujol, O. Bruguier, O. Poma, M. J. Hernández, O. Averbuch, M. Seyler, D. Bosch, F. Chanier, S. Ventalon, C. Liorzou, V. Bosse   +14 more
wiley   +1 more source

Life histories of straight-tusked elephants from the Last Interglacial Neanderthal site of Neumark-Nord (~125 ka). [PDF]

Sci Adv
Armaroli E, Lugli F, Tacail T, Kindler L, Gaudzinski-Windheuser S, Scherjon F, Roebroeks W, Parker G, Vonhof H, Cipriani A, Tütken T, Müller W.   +11 more
europepmc   +1 more source

Vanadium Isotopic Compositions of the High‐3He/4He Baffin Island Lavas

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The isotopic composition of vanadium (V) in hotspot lavas provides new insight into the source of deep mantle heterogeneities. We measured V isotopic compositions in Paleogene Baffin Island lavas, which erupted above the Iceland plume head, to constrain the mantle plume source. These lavas have V isotopic compositions that are lighter (−0.96 ± 
Jonas Kaare‐Rasmussen, Forrest Horton, Maureen Auro, Andy W. Heard, Sune G. Nielsen   +4 more
wiley   +1 more source

Strontium isotope mapping of elephant enamel supports an integrated microsampling-modeling workflow to reconstruct herbivore migrations. [PDF]

Commun Biol
Yang D, Podkovyroff K, Uno KT, Bowen GJ, Fernandez DP, Cerling TE.   +5 more
europepmc   +1 more source

Long‐Distance Aeolian Dust Deposited on the Island of Crete (Greece): Detection, Characterization, and Provenance

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 8, August 2026.
Abstract Long‐distance aeolian dust transport represents one of the largest sediment fluxes on Earth, with North Africa being a dominant source. The island of Crete in the Eastern Mediterranean lies within major transport pathways but remains underexplored regarding multi‐proxy fingerprinting of deposited dust.
S. Bitzan, C. L. Blanchet, S. Pichat, G. E. Christidis, K. Schepanski, F. Kirsten   +5 more
wiley   +1 more source

Laser ablation-based techniques for microplastic analysis: recent advances and applications.

J Anal At Spectrom
Modlitbová P, Brunnbauer L, Kalčíková G, Fazlić A, Limbeck A, Pořízka P, Kaiser J.   +6 more
europepmc   +1 more source

Zinc isotope evidence for extensive carbonate recycling in the Arctic asthenosphere. [PDF]

Nat Commun
Zhang WQ, Ding WW, Liu CZ, Lissenberg CJ, Wang YJ, Zhang T, Tan PC, Zou ZQ, Xu Y, Lu JG, Fang YX, Li JB.   +11 more
europepmc   +1 more source

Eocene to Miocene U‐Pb Geochronology Evolution of the Rio Grande Rise, Southwestern Atlantic: A Paleoceanographic Approach

Paleoceanography and Paleoclimatology, Volume 41, Issue 8, August 2026.
Abstract The Rio Grande Rise (RGR) is a major submarine feature in the South Atlantic that plays an important role in regional oceanographic dynamics. This study presents new U‐Pb geochronology of sedimentary rocks from the RGR, offering direct age constraints on carbonate and apatite embedded within Fe‐Mn crusts and associated foraminifera fossils ...
Giovanna Orletti Del Rey, Roberto Ventura Santos, Lucieth Cruz Vieira, Isabela Moreno Cordeiro Sousa, Antônio Cosme Del Rey, Guilherme de Oliveira Gonçalves, Elton Luiz Dantas, Paola Ferreira Barbosa, Eugênio Pires Frazão   +8 more
wiley   +1 more source