Radium and Lead Radioisotopes Composition of Sediment and Its Biogeochemical Implication in Polymetallic Nodule Area of Clario-Clipperton Zone.
Molecules
; 27(16)2022 Aug 09.
Article
em En
| MEDLINE
| ID: mdl-36014297
ABSTRACT
Radioactivity levels of 210Pb and 226Ra were detected in a sediment core obtained using a multi-corer from the polymetallic nodule area inside the Clarion-Clipperton Zone (CCZ), a contract area of the China Ocean Mineral Resources Association (COMR) in the eastern Pacific Ocean. The profile of excess 210Pb (210Pbex) shows that the specific activity of 210Pbex has three parts with different distributions at depths of 0-16 cm (I), 17-36 cm (II), and 37-48 cm (III). When the I section of nonlocal mixing was excluded, using a steady-state diffusion mode, the bioturbation coefficients of the core were estimated to be 24.2 cm2/a at 17-36 cm deep and 5.9 cm2/a at 37-48 cm deep, which were greater compared to previously published results. This is most likely owing to bioturbations caused by various organism species in the two sections.
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01-internacional
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MEDLINE
Assunto principal:
Radioisótopos de Chumbo
/
Rádio (Elemento)
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article