Results 141 to 150 of about 47,686 (243)

Mass spectrometry measurements of mercury isotope ratios support geochemical sourcing of archaeological cinnabar in the Andean region. [PDF]

PLoS One
Young M, Cooke C, Burger R, Kaplan E, Prieto G, Bongers J, Dalton J, Usama F, Yuan S, Hintelmann H.   +9 more
europepmc   +1 more source

Development of Suppressed Ion Chromatography for the Online Quantification of Cations in Electrochemical Ammonia Synthesis Research

ChemSusChem, Volume 19, Issue 3, February 2026.
We developed a suppressed ion chromatography method with automated matrix neutralization and matrix elimination for the quantitative determination of ammonium in electrochemical ammonia synthesis research. Online determination of ammonium in 0.2 M sulfuric acid electrolyte revealed Nafion ionomer as a non‐negligible secondary source of ammonium ...
Sebastian Bragulla, Julian Lorenz, Corinna Harms, Michael Wark, K. Andreas Friedrich   +4 more
wiley   +1 more source

Ore Genesis of the Jiawula Pb-Zn-Ag Deposit, Inner Mongolia: Constraints from C-H-O Isotopes, In Situ S Isotopes, Fluid Inclusions, and LA-ICP-MS Analysis of Chalcopyrite. [PDF]

ACS Omega
Li H, Mi W, Zuo Y, Xu J, Ren Z.
europepmc   +1 more source

Polygonal tepee structures of Arabia

The Depositional Record, Volume 12, Issue 1, February 2026.
Tepee structures on Sheybarah Island form polygonal microbial cemented crusts in the intertidal. Radiocarbon dating suggests they formed in the Holocene and reflect minor sea‐level changes, highlighting their value as palaeoenvironmental indicators. Satellite surveys identified 126 polygonal features, including coral reefs that may have developed on ...
Pauline Falkenberg, Sarima Vahrenkamp, Elisa Garuglieri, Alexander Petrovic, Kai Hachmann, Viswasanthi Chandra, Volker C. Vahrenkamp   +6 more
wiley   +1 more source

Redox and magma recharge controls on excess sulfur build-up at Mount Samalas, 1257 CE. [PDF]

Nat Commun
Ding S, Longpré MA, Economos R, Jackson Y, Vidal CM, Komorowski JC, Monteleone B.   +6 more
europepmc   +1 more source

Orbital and eustatic control of basin hydrology during the first stage of the Messinian Salinity Crisis

The Depositional Record, Volume 12, Issue 1, February 2026.
The paleo‐hydrology of the Sorbas Basin (SE Spain) and the wider Mediterranean region during the deposition of the Primary Lower Gypsum (PLG) stage of the Messinian Salinity Crisis, from ~5.97 to ~5.60 Ma, was affected by tectonics, precession‐forced climate oscillations, and eustatic sea‐level change.
Fernando Gázquez, Nicholas P. Evans, Thomas K. Bauska, Harold J. Bradbury, Alexandra V. Turchyn, María del Carmen Barroso, Alexander M. Piotrowski, José María Calaforra, David A. Hodell   +8 more
wiley   +1 more source

Sulfur as a proxy for identifying coast-inland human mobility in Northern Iberia during Late Prehistory. [PDF]

PLoS One
González-Rabanal B, Vidal-Cordasco M, Jones JR, Agudo Pérez L, Carmona-Ballestero E, López B, Martín Merino MÁ, Ortega AI, Straus LG, Stevens RE, Vega-Maeso C, González Morales MR, Marín-Arroyo AB.   +12 more
europepmc   +1 more source

Laguna Fuente de Piedra: An example of a dolomite factory recording ~50,000 years of depositional and paleoclimatic evolution

The Depositional Record, Volume 12, Issue 1, February 2026.
This study characterises carbonate mineral precipitation mechanisms and their paleoenvironmental implications in a semi‐arid, saline playa lake system. SEM image with EDS spectra shows microcrystalline, spherical shaped dolomite crystals from Laguna Fuente de Piedra composed of nanocrystals with bacterial voids and EPS.
Zeina Naim, Guolai Li, Luis Gibert, Jan‐Berend Stuut, Gonzalo Jiménez‐Moreno, Mónica Sánchez‐Román   +5 more
wiley   +1 more source

Heavy potassium isotopes in carbonatites reveal oceanic crust subduction as the driver of deep carbon cycling. [PDF]

Sci Adv
Long ZY, Moynier F, Debret B, Qiu KF, Dai W, Sun HX, Deng J, Bertrand H, Burton K, Inglis E, Tappe S.   +10 more
europepmc   +1 more source

Sulfur isotope exchange reactions in the aqueous system: thiosulfate-sulfide-sulfate at hydrothermal temperature

, 1985
Fumitake Uyama, H. Chiba, M. Kusakabe, H. Sakai   +3 more
semanticscholar   +1 more source