Results 1 to 10 of about 11,150 (165)

Correlated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body [PDF]

Scientific Reports, 2021
Iron isotopes record the physical parameters, such as temperature and redox conditions, during differentiation processes on rocky bodies. Here we report the results of a correlated investigation of iron isotope compositions and silicon contents of ...
Soumya Ray, Laurence A. J. Garvie, Vinai K. Rai, Meenakshi Wadhwa   +3 more
doaj   +2 more sources

Tracing and constraining anthropogenic aerosol iron fluxes to the North Atlantic Ocean using iron isotopes [PDF]

Nature Communications, 2019
The relative importance of crustal vs. anthropogenic dust deposition for iron cycling in the surface ocean is unclear. Based on analysis of iron isotope data from North Atlantic aerosol samples, the authors can reveal the relative importance of ...
Tim M. Conway, Douglas S. Hamilton, Rachel U. Shelley, Ana M. Aguilar-Islas, William M. Landing, Natalie M. Mahowald, Seth G. John   +6 more
doaj   +2 more sources

Constraints on the Cycling of Iron Isotopes From a Global Ocean Model [PDF]

Global Biogeochemical Cycles, 2021
D KÖNIG, Tim M Conway, Michael J Ellwood   +2 more
exaly   +2 more sources

Metal-driven anaerobic oxidation of methane and the Sturtian deglaciation [PDF]

Nature Communications
The Sturtian and Marinoan glaciations shaped Neoproterozoic palaeoenvironmental evolution. While methane emission likely intensified the Marinoan greenhouse effect, its role during the Sturtian glaciation—coinciding with widespread iron formations (IFs ...
Jun Hu, Sanzhong Li, Shui-Jiong Wang, Jörn Peckmann, Hongxiang Guan, Shao-yong Jiang, Wei Chen, Huan Cui, Zheng Qin, Peng Liu, Yanhui Suo, Zhaoxia Jiang, Dongyong Li, Nan Wang, Xiaohui Li, Yuan Zhong, Ruru Li, Xi-Ming Yang, Kurt O. Konhauser   +18 more
doaj   +2 more sources

Screening Effects on Electron-Capture Rates and Type Ia Supernova Nucleosynthesis [PDF]

EPJ Web of Conferences, 2022
Nucleosynthesis of iron-group elements in Type Ia supernovae is studied for single-degenerate models with the use of electron-capture rates updated with the new shell-model Hamiltonian in pf -shell.
Suzuki Toshio, Mori Kanji, Honma Michio, Famiano Michael A., Kajino Toshitaka, Kusakabe Motohiko, Balantekin A. Baha   +6 more
doaj   +1 more source

Bioturbation and the δ56Fe signature of dissolved iron fluxes from marine sediments

Royal Society Open Science, 2023
We developed a reaction-transport model capable of tracing iron isotopes in marine sediments to quantify the influence of bioturbation on the isotopic signature of the benthic dissolved (DFe) flux.
Sebastiaan J. van de Velde, Andrew W. Dale, Sandra Arndt   +2 more
doaj   +1 more source

Iron Isotopic Composition of Biological Standards Relevant to Medical and Biological Applications

Frontiers in Medicine, 2021
Iron isotopes are fractionated by multiple biological processes, which offers a novel opportunity to study iron homeostasis. The determination of Fe isotope composition in biological samples necessitates certified biological reference materials with ...
Edith Kubik, Frédéric Moynier, Frédéric Moynier, Marine Paquet, Julien Siebert, Julien Siebert   +5 more
doaj   +1 more source

Holocene Spatiotemporal Redox Variations in the Southern Baltic Sea

Frontiers in Earth Science, 2021
Low oxygen conditions in the modern Baltic Sea are exacerbated by human activities; however, anoxic conditions also prevailed naturally over the Holocene. Few studies have characterized the specific paleoredox conditions (manganous, ferruginous, euxinic)
Dalton S. Hardisty, Natascha Riedinger, Noah J. Planavsky, Dan Asael, Steven M. Bates, Timothy W. Lyons   +5 more
doaj   +1 more source

Discovery of the iron isotopes [PDF]

Atomic Data and Nuclear Data Tables, 2010
Twenty-eight iron isotopes have so far been observed; the discovery of these isotopes is discussed. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented.
Schuh, A., Fritsch, A., Heim, M., Shore, A., Thoennessen, M.   +4 more
openaire   +2 more sources

Interferences and Matrix Effects on Iron Isotopic Composition Measurements by 57Fe-58Fe Double-Spike Multi-Collector Inductively Coupled Plasma Mass Spectrometry; the Importance of Calcium and Aluminum Interferences

Frontiers in Environmental Chemistry, 2021
Multi-collector inductively coupled plasma mass spectrometers (MC-ICPMS) are widely used for Fe isotope measurements. The latter may be perturbed by interferences (notably from Cr and Ni) and matrix effects (notably from major elements), caused by ...
F. Lacan, L. Artigue, J. K. Klar, C. Pradoux, J. Chmeleff, R. Freydier   +5 more
doaj   +1 more source