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Boening, Philipp; Bard, Edouard; Rose, Jerome. |
Here we describe a chemical analysis technique for Ca, Fe, K, Sr, Ti, and S using a recently developed Micro-XRF analyzer (Micro-XRF) with a 100-mm resolution and an XRF whole-core scanner (XRF-S) with a 5-mm resolution for selected sediment sections from a continental margin sediment core. The Micro-XRF produces highly resolved element maps of individual sections, and the calculation of individual continuous element profiles is based on overlap measurements of successive sections. By means of discrete subsamples analyzed by ICP-OES, the two XRF data sets are successfully calibrated to provide quantitative profiles of Ca, Fe, K, Sr, and Ti. We discuss the advantages and limitations of both XRF techniques. A comparison of the two independent XRF data sets... |
Tipo: Text |
Palavras-chave: Micro-XRF scanner; High-resolution XRF analysis; Major and trace elements. |
Ano: 2007 |
URL: https://archimer.ifremer.fr/doc/00235/34614/32957.pdf |
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Rousseau, Tristan C.c.; Roddaz, Martin; Moquet, Jean-sébastien; Delgado, Helga Handt; Calves, Gérôme; Bayon, Germain. |
We report mineralogical, elemental (major and trace elements) and SrNd isotopic data for suspended particulate matter (SPM) samples from the Amazon, Orinoco and Maroni Rivers collected on a monthly basis over a one-year long hydrological cycle. The aim of this study was i) to characterize the mineralogical and geochemical composition of major South American tropical rivers and ii) to evaluate the effect of seasonal hydroclimate variations and changes in sediment discharge on the composition of these SPM. In addition to displaying particular mineralogical and geochemical signatures (e.g. Al/Si ratios, weathering indices), the Amazon, Orinoco and Maroni SPM are characterized by marked differences in 87Sr/86Sr (0.7213 ± 0.0030, 0.7288 ± 0.0018 and... |
Tipo: Text |
Palavras-chave: Major and trace elements; Nd-Sr isotopes; Suspended sediments; Yearly hydrological cycle; Amazon River; Orinoco River; Maroni River. |
Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00498/60962/64370.pdf |
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