DC pole | Wartość | Język |
dc.contributor.author | Fiałkiewicz-Kozieł, Barbara | - |
dc.contributor.author | Bao, Kunshan | - |
dc.contributor.author | Smieja-Król, Beata | - |
dc.date.accessioned | 2021-11-19T07:31:36Z | - |
dc.date.available | 2021-11-19T07:31:36Z | - |
dc.date.issued | 2022 | - |
dc.identifier.citation | "Science of the Total Environment", Vol. 807, 2022, art. no. 150481, s. 1-11 | pl_PL |
dc.identifier.issn | 0048-9697 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/21907 | - |
dc.description.abstract | Geochemical shifts triggered by surface runoff and atmospheric fallout in a Chinese peatland were investigated
by using Pb, Sr, and Nd, REE and by SEMmineralogical analysis.Motianling peatland (Northeast China) is located
at 1670ma.s.l., near the China–Mongolia border. Based on division of profile into two phases of different trophy,
the totalΣREE value determined for the minerotrophic part of the profile (from 62 to 46 cm) varied from 67 to
31 mg·kg−1 and mineralogical analysis revealed the occurrence ofweathered volcanic rocks, supported by a high
εNd value (−3.26). After the transition from minerotrophic to more ombrotrophic conditions, the peatland became
independent of the local bedrock weathering, which was manifested by a much lower concentration of
REE (7–20 mg·kg−1) and lower εNd values (−7.37; −8.11). Moreover, PAAS-normalized pattern of REE distribution
in the bottom part revealed the highest Eu/Eu* value (1.24), as well as a slight enrichment in Eu. The anthropogenic
effect was visible from 1964, during which period the spheroidal aluminosilicate particles (SAP),
produced by coal-fired power-plant activity, appeared for the first time, followed by an abrupt decrease in
206Pb/207Pb isotopic signature to 1.167. The dimensions of SAP (~1.5 μm), as well as the time of first appearance,
indicated long-range transport. The REE ratios obtained in this study are characteristic of the eolian deposition
signature, which is like the Gobi and northern Chinese deserts. The anthropogenic activity was manifested by a
slight enrichment in Gd during reduced delivery of natural dust. Both, North Chinese and Asian part of the
Russian industry supply anthropogenic dust. Topography, wind direction, and patterns of precipitation, as well
as the initial phases of Asian industrial development, are the most important drivers promoting the deposition
of chemical elements. | pl_PL |
dc.language.iso | en | pl_PL |
dc.rights | Uznanie autorstwa 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/pl/ | * |
dc.subject | peat bog | pl_PL |
dc.subject | stable isotopes | pl_PL |
dc.subject | rare earth elements | pl_PL |
dc.subject | anthropocene | pl_PL |
dc.subject | source provenance | pl_PL |
dc.title | Geographical drivers of geochemical and mineralogical evolution of Motianling peatland (Northeast China) exposed to different sources of rare earth elements and Pb, Nd, and Sr isotopes | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.identifier.doi | 10.1016/j.scitotenv.2021.150481 | - |
Pojawia się w kolekcji: | Artykuły (WNP)
|