Academic Journal
Constraints on the source of reactive phases in sediment from a major Arctic river using neodymium isotopes ...
| العنوان: | Constraints on the source of reactive phases in sediment from a major Arctic river using neodymium isotopes ... |
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| المؤلفون: | Larkin, Christina, Piotrowski, Alex, Hindshaw, Ruth, Bayon, Germain, Hilton, Robert, Baronas, Jotautas, Dellinger, Mathieu, Wang, Ruixue, Tipper, Edward |
| بيانات النشر: | Elsevier |
| سنة النشر: | 2021 |
| المجموعة: | DataCite Metadata Store (German National Library of Science and Technology) |
| مصطلحات موضوعية: | iron oxides, bioavailable, neodymium isotopes, Arctic |
| الوصف: | Riverine suspended particulate matter (SPM) is essential for the delivery of micronutrients such as iron (Fe) to the oceans. SPM is known to consist of multiple phases with differing reactivity, but their role in the delivery of elements to the oceans is poorly constrained. Here we provide new constraints on the source and composition of reactive phases in SPM from the Mackenzie River, the largest sediment source to the Arctic Ocean. Sequential leaching of SPM shows that river sediments contain labile Fe phases. We estimate the labile Fe flux is substantial (0.21(+0.06,-0.05) Tg/yr) by quantifying Fe concentrations in weak leaches of the SPM. The labile Fe phase hosts a considerable amount of rare earth elements (REE), including neodymium (Nd). We demonstrate that the labile Fe phase and dissolved load have radiogenic Nd isotope ratios that are identical within uncertainty, but up to 8 epsilon units distinct from the silicate phase. We interpret this as evidence for dynamic cycling between Fe-oxide phases in ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | https://dx.doi.org/10.17863/cam.66779 |
| DOI: | 10.17863/cam.72226 |
| الاتاحة: | https://dx.doi.org/10.17863/cam.72226 https://www.repository.cam.ac.uk/handle/1810/324773 |
| Rights: | open.access ; Creative Commons Attribution Non Commercial No Derivatives 4.0 International ; https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode ; cc-by-nc-nd-4.0 ; http://purl.org/coar/access_right/c_abf2 |
| رقم الانضمام: | edsbas.D7CBD739 |
| قاعدة البيانات: | BASE |
| DOI: | 10.17863/cam.72226 |
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