Results 41 to 50 of about 888,623 (212)

Sr and Pb isotopes as environmental indicators in environmental studies

Environment International, 2002
An environmental indicator is a numerical or a descriptive categorization of environmental data with the primary purpose of assessing the affected environment. In these studies, two characteristic isotopes, namely Sr and Pb, were assessed of their ability to describe the affected environment in environmental studies by detecting trends of pollution ...
G, Charalampides, O, Manoliadis
openaire   +2 more sources

Equilibrium Fractionation of Stable Strontium Isotopes During Adsorption to Mn Oxides

Geochemistry, Geophysics, Geosystems
Understanding the stable strontium isotope fractionation between seawater and ferromanganese crusts/nodules is crucial for reconstructing seawater Sr isotopic history.
Ben Liu, Guanhong Zhu, Jinlong Ma, Le Zhang, Gangjian Wei   +4 more
doaj   +1 more source

Re-Os geochronology and coupled Os-Sr isotope constraints on the Sturtian snowball Earth

Proceedings of the National Academy of Sciences of the United States of America, 2013
Significance The causal mechanisms of global glaciations are poorly understood. The transition to a Neoproterozoic Snowball Earth after more than 1 Gy without glaciation represents the most dramatic episode of climate change in the geological record ...
A. Rooney, F. Macdonald, J. Strauss, F. Dudás, C. Hallmann, David Selby   +5 more
semanticscholar   +1 more source

Using ⁸⁷Sr/⁸⁶Sr LA-MC-ICP-MS Transects within Modern and Ancient Calcite Crystals to Determine Fluid Flow Events in Deep Granite Fractures

Geosciences, 2020
The strontium isotope signature (87Sr/86Sr) of calcite precipitated in rock fractures and faults is a frequently used tool to trace paleofluid flow.
Henrik Drake, Ellen Kooijman, Melanie Kielman-Schmitt   +2 more
doaj   +1 more source

Determination of Sr–Nd–Pb Isotopic Ratios of Rock Reference Materials Using Column Separation Techniques and TIMS

Separations, 2021
Thermal ionization mass spectrometry (TIMS) can provide highly accurate strontium (Sr), neodymium (Nd), and lead (Pb) isotope measurements for geological and environmental samples.
Hui Je Jo, Hyo Min Lee, Go-Eun Kim, Won Myung Choi, Taehoon Kim   +4 more
doaj   +1 more source

Sr ISOTOPIC EVIDENCE FOR STUDYING THE SALINIZATION OF SOILS: AN EXAMPLE FROM THE SAN VITALE PINEWOOD (RAVENNA)

EQA, 2009
In the frame of a multidisciplinary project of research on the San Vitale Pinewood ecosystem, north of Ravenna, the Sr isotope study of a soil profile developed on an old coastal dune aiming at detecting the effect of salinization is presented.
Umberto Masi, Francesca Castorina
doaj   +1 more source

Strontium isotope geochemistry of alluvial groundwater: a tracer for groundwater resources characterisation [PDF]

Hydrology and Earth System Sciences, 2004
This study presents strontium isotope and major ion data of shallow groundwater and river water from the Ile du Chambon catchment, located on the Allier river in the Massif Central (France). There are large variations in the major-element contents in the
P. Négrel, P. Négrel, E. Petelet-Giraud, E. Petelet-Giraud, D. Widory, D. Widory   +5 more
doaj  

Lombards on the move--an integrative study of the migration period cemetery at Szólád, Hungary. [PDF]

PLoS ONE, 2014
In 2005 to 2007 45 skeletons of adults and subadults were excavated at the Lombard period cemetery at Szólád (6th century A.D.), Hungary. Embedded into the well-recorded historical context, the article presents the results obtained by an integrative ...
Kurt W Alt, Corina Knipper, Daniel Peters, Wolfgang Müller, Anne-France Maurer, Isabelle Kollig, Nicole Nicklisch, Christiane Müller, Sarah Karimnia, Guido Brandt, Christina Roth, Martin Rosner, Balász Mende, Bernd R Schöne, Tivadar Vida, Uta von Freeden   +15 more
doaj   +1 more source

Snapshots of an Evolving Solar Nebula Recorded in Nucleosynthetic Sr and Ba Signatures of Early Condensates

The Astrophysical Journal Letters
The discovery of extreme strontium isotope anomalies ( μ ^84 Sr) in refractory leachates from Allende fine-grained calcium-aluminum-rich inclusions (CAIs) is at odds with long-standing predictions regarding the homogenization of presolar components in ...
R. T. C. Marquez, B. L. A. Charlier, F. L. H. Tissot   +2 more
doaj   +1 more source

Boron and Molybdenum Isotope Evidence for Source‐Controlled Compositional Diversity of Cenozoic Granites in the Eastern Tethyan Himalaya

Geochemistry, Geophysics, Geosystems, 2023
The origins of Cenozoic granites in the Himalaya are key to understanding the evolution of the Himalayan orogen. However, it is unclear whether these granites represent primary melts, and the nature of their magma source is controversial.
Jing‐Jing Fan, Qiang Wang, Gang‐Jian Wei, Jie Li, Lin Ma, Xiu‐Zheng Zhang, Zi‐Qi Jiang, Jin‐Long Ma, Jin‐Sheng Zhou, Qi‐Wei Li, Zi‐Long Wang, Xiao Liu, Tong‐Yu Huang, Miao‐Yan Zhang   +13 more
doaj   +1 more source