Results 51 to 60 of about 888,623 (212)

Crystal recycling in the steady-state system of the active Stromboli volcano: a 2.5-ka story inferred from in situ Sr-isotope and trace element data

Contributions to Mineralogy and Petrology, 2011
In situ Sr-isotope data by microdrilling, coupled with major and trace element analyses, have been performed on plagioclase and clinopyroxene from seven samples collected during the 2002–2003 eruptive crisis at Stromboli volcano (Aeolian Islands, Italy).
L. Francalanci, R. Avanzinelli, I. Nardini, M. Tiepolo, J. Davidson, R. Vannucci   +5 more
semanticscholar   +1 more source

Controls on stable strontium isotope fractionation in coccolithophores with implications for the marine Sr cycle

, 2014
The controls on stable Sr isotope fractionation into the calcite produced by the coccolithophore species Emiliania huxleyi , Coccolithus pelagicus spp. braarudii and Gephyrocapsa oceanica are investigated . Each species has been cultured under controlled
E. Stevenson, M. Hermoso, R. Rickaby, J. Tyler, F. Minoletti, I. Parkinson, F. Mokadem, K. Burton   +7 more
semanticscholar   +1 more source

Heavy iron isotopes in arc rocks reveal anoxic sediment recycling in subduction zones

Communications Earth & Environment
The formation mechanism of arc mafic rocks with heavy iron isotope signature remains enigmatic. Here we report Fe-Mo-Sr-Nd-Hf isotope data of arc rocks from Northeast China. The studied arc rocks have δ56Fe values (0.08‰ to 0.23‰) comparable to or higher
Zhigang Wang, Li-Qun Dai, Zi-Fu Zhao, Li-Tao Ma, Wei Fang, Xing-Mian Hu   +5 more
doaj   +1 more source

A strontium (87Sr/86Sr) isoscape of Southern Ethiopia: implications for hominin land use and faunal mobility patterns

Frontiers in Environmental Archaeology
Tracing human and animal mobility behavior, land use, and exploitation strategies through strontium (Sr) isotope analysis is critical for archaeological and palaeoecological research.
Seminew Asrat, Seminew Asrat, Francesco Lucchini, Mary Anne Tafuri, Caterina Aureli, Marina Gallinaro, Andrea Zerboni, Marianna Fusco, Enza E. Spinapolice   +8 more
doaj   +1 more source

δ26Mg, δ44Ca and 87Sr/86Sr isotope ratios constrain Mg and Ca input–output mass balances in a heavily acidified headwater catchment

Environmental Sciences Europe
A Central European catchment underlain by base-poor orthogneiss was studied using mass budgets and Mg–Ca–Sr isotope systematics. For 50 years, the catchment received large amounts of partly soluble dust from a nearby cluster of coal-burning power plants,
Martin Novak, Frantisek Veselovsky, Jakub Hruška, Chris Holmden, Alexandre V. Andronikov, Yulia V. Erban Kochergina, Vaclav Kachlik, Marketa Stepanova, Ondrej Pour, Ondrej Sebek, Eva Prechova, Arnost Komarek, Jan Curik, Frantisek Laufek, Irina E. Andronikova, Daniela Fottova, Pavla Holeckova, Tomas Paces   +17 more
doaj   +1 more source

The Nd and Sr isotopic evolution of Proterozoic seawater

Geophysical Research Letters, 1988
Nd and Sr isotopic measurements from a variety of marine chemical precipitates provide insight into processes controlling the chemistry of seawater during the Proterozoic. Nd isotope measurements on banded iron formations and phosphorites, and Sr isotope measurements on carbonates indicate that during both the Early and Late Proterozoic, hydrothermal ...
Louis A. Derry, Stein B. Jacobsen
openaire   +1 more source

Random forest-based bioavailable strontium isoscape for environmental and archaeological applications in central eastern Argentina and western Uruguay.

PLoS ONE
Bioavailable strontium (Sr) isoscapes are essential tools in studies on environmental processes, animal and human mobility and provenance. The success of these studies relies on the comparison between the measured 87Sr/86Sr isotope ratios of specimens ...
Cinzia Scaggion, Tommaso Giovanardi, Daniel Loponte, Mirian Carbonera, Elena Armaroli, Sara Bernardini, Stefano Benazzi, Andrés Gascue, Alejandro Acosta, Giulia Marciani, Eugenio Bortolini, Anna Cipriani, Federico Lugli   +12 more
doaj   +1 more source

Development of a sample preparation procedure for Sr isotope analysis of Portland cements. [PDF]

Anal Bioanal Chem, 2022
Kazlagić A, Russo FF, Vogl J, Sturm P, Stephan D, Gluth GJG.   +5 more
europepmc   +1 more source

Exploring the Potential of ⁸⁷Sr/⁸⁶Sr Isotope Ratio with Strontium and Rubidium Levels to Assess the Geographic Origin of Saffron. [PDF]

Foods, 2023
Horacek M, Lage M, Vakhlu J.
europepmc   +1 more source

Combined Sr isotope and trace element analysis of melt inclusions at sub-ng levels using micro-milling, TIMS and ICPMS

, 2009
This paper describes a technique, which allows precise and accurate Sr isotope measurement combined with trace element analysis of individual melt inclusions, of sample sizes ≪ 1 ng of Sr.
R. Harlou, D. Pearson, G. Nowell, C. Ottley, J. Davidson   +4 more
semanticscholar   +1 more source