Rare earth elements geochemistry in surface floodplain sediments from the Xiangjiang River, middle reach of Changjiang River, China

Mao, Longjiang; Mo, Duowen; Yang, Jinghong; Guo, Yuanyuan; Lv, Haiyan

doi:10.1016/j.quaint.2014.01.052

Cited by 52 publications

(18 citation statements)

References 45 publications

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“…The influence of the bedrock composition on the REE pattern was thus obvious, indicating that PAAS was not convenient as a reference, since except for MREE, it overestimated the sediment REE depletion. The normalisation pattern to local bedrock was indeed in agreement with the processes classically observed for river transport downstream and erosion (relative impoverishment of HREE) (Mao et al, 2014;Fiket et al, 2017). The LREE Table 4 Concentrations of EDTA extractable REE (except Sm and La, Ce, and Nd in MG, which were below the detection limit) in Tafna River bed sediments (% of total content) from the sampling stations during two contrasting hydrological conditions (high water, HW, October 2014) and (low water, LW, June 2014).…”

Section: Origin and Fractionation Of Reesupporting

confidence: 86%

“…Variations and the behaviour across the REE series were indicated by the proportion of enriched light rare earth elements (LREE) with respect to medium rare element (MREE) and to heavy rare earth elements (HREE). This was illustrated by the (La/Yb)n ratio (representative of LREE/HREE), (La/Sm)n ratio (representative of LREE/ MREE), and (Sm/Yb)n ratio (representative of MREE/HREE), respectively (Condie, 1993;Mao et al, 2014;Inguaggiato et al, 2017), where n = every element concentration in sediment normalised to its concentration in bedrock.…”

Section: Normalisation and Element Ratiomentioning

confidence: 99%

“…The high concentration of Y observed in I5 and T5 (Table 2), as well as the highest proportion of anthropogenic Gd (between 16 and 18%, Di Leonardo et al, 2009), also argues for an anthropogenic contribution. This latter finding might originate from the release of waste waters (Bau et al, 2006;Mao et al, 2014), especially in the rivers flowing through densely populated and industrial areas (Tlemcen, Maghnia, and Oujda). Indeed, the increase in Gd in river water downstream of big cities was shown to come in particular from hospital medical waste due to its use as a contrasting agent in magnetic resonance imaging (Bau and Dulski, 1996;Moller et al, 2002), which is the case in Tlemcen and Maghnia (the regional centre for this instrumentation).…”

Section: Edta Extractable Fraction Of Reementioning

confidence: 99%

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Origin, distribution, and behaviour of rare earth elements in river bed sediments from a carbonate semi-arid basin (Tafna River, Algeria)

Benabdelkader

Taleb

Probst

et al. 2019

Applied Geochemistry

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A B S T R A C TThe behaviour and sources of rare earth elements (REE) in river sediments were investigated at ten stations and two dams of the Tafna basin (Northern Algeria) during contrasting hydrological conditions and using a combination of normalisation procedures, REE anomalies, various REE ratios, and multivariate statistical analysis. The ranking and REE concentrations were in the range of other carbonated areas. The classical fractionation of the heavy REE(HREE) erosion pattern, evidenced from upstream to downstream by the La/Yb or Sm/Yb ratios, was disturbed by the presence of dams, which retained the light REE (LREE) in particular. The hydrological conditions, particle size, and geochemical characteristics controlled the REE patterns. The LREE were associated with clay minerals and HREE with coarse silts, whereas carbonate and particulate organic carbon (POC) did not influence the transport downstream. The total concentration of REE in sediments was not strongly affected by anthropogenic inputs from various sources (industrial activities, and domestic or medical wastes). Indeed, some LREE enrichment and anomalies were detected at a few stations and locally for Gd, Tb, and Yb. However, the anthropogenic contribution can partially be hidden by dilution due to particle erosion. High flow increased the LREE and MREE enrichment and LREE/HREE fractionation in some places due to erosion processes and anthropic influences (dam releases and local wastes inputs). Middle REE (MREE) and HREE were the most extractable elements unlike LREE (which are the most concentrated), particularly during high water conditions. Finally, the REE demonstrated the impact of natural processes (hydrological, geochemical, and physical) and some anthropogenic disturbances (waste inputs, fertilisers, and dams). This might inspire to develop such investigations in other similar semi-arid basins undergoing various pressures. The use of local bedrock as a reference and a set of geochemical and statistical tools, is recommended.

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Section: Origin and Fractionation Of Reesupporting

confidence: 86%

Section: Normalisation and Element Ratiomentioning

confidence: 99%

Section: Edta Extractable Fraction Of Reementioning

confidence: 99%

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Origin, distribution, and behaviour of rare earth elements in river bed sediments from a carbonate semi-arid basin (Tafna River, Algeria)

Benabdelkader

Taleb

Probst

et al. 2019

Applied Geochemistry

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“…A number of fundamental studies focused on the role of sediments as carriers and potential sources of REE during the estuarine and oceanographic processes and discussed essential geochemical features of REE in the aquatic environment [ Martin et al ., ; Goldstein and Jacobsen , ; Elderfield et al ., ; Sholkovitz , ; Singh , ; Bayon et al ., ]. In China, similar studies put more emphases on REE geochemistry in large river‐borne sediments, such as the Changjiang (Yangtze River), Huanghe (Yellow River), and Zhujiang (Pearl River), together with some medium to small rivers [ Zhang et al ., ; Zhang and Wang , ; Yang et al ., ; Lin et al ., ; Xu and Han , ; Mao et al ., ].…”

Section: Introductionmentioning

confidence: 98%

Revisit of rare earth element fractionation during chemical weathering and river sediment transport

Yang

Guo

et al. 2017

Geochem Geophys Geosyst

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Although rare earth element (REE) has been widely applied for provenance study and paleoenvironmental reconstruction, its mobility and fractionation during earth surface processes from weathering to sediment deposition remain more clarification. We investigated the REE fractionations during chemical weathering and river sediment transport based on the systematic observations from a granodiorite‐weathering profile and Mulanxi River sediments in southeast China. Two chemical phases (leachates and residues) were separated by 1 N HCl leaching and the leachates account for 20–70% of the bulk REE concentration. REEs in the weathering profile have been mobilized and fractionated to different extents during chemical weathering and pedogenesis. Remarkable cerium anomalies (Ce/Ce* = 0.1–10.6) occur during weathering as a result of coprecipitation with Mn (hydro)oxides in the profile, while poor or no Ce anomalies in the river sediments were observed. This contrasting feature sheds new light on the indication of Ce anomaly for redox change. The hydraulic sorting‐induced mineral redistribution can further homogenize the weathering and pedogenic alterations and thus weaken the REE fractionations in river sediments. The mineral assemblage is the ultimate control on REE composition, and the Mn‐Fe (hydro)oxides and secondary phosphate minerals are the main hosts of acid‐leachable REEs while the clay minerals could be important reservoirs for residual REEs. We thus suggest that the widely used REE proxies such as (LREE/HREE)UCC ratio in the residues is reliable for the indication of sediment provenance, while the ratio in the leachates can indicate the total weathering process to some extent.

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“…De fato, a contribuição antrópica de ETR para o meio marinho já foi relatada por diversos autores e se dá principalmente pela má gestão de rejeitos da extração de minerais fosfatados (BORREGO et al, 2004;SILVA;FÁVARO, 2005;OLIVEIRA et al, 2007;TRANCHIDA et al, 2011;SANDERS et al, 2013) e também por drenagem ácida de minas (Acid Mine Drainage -AMD) (ELBAZ-POULICHET e DUPEY, 1999;JOHANNESSON E ZHOU, 1999;BORREGO et al, 2004;PEREZ-LOPEZ et al, 2010;SHYNU et al, 2011;MAO et al, 2014).…”

Section: Fosfogesso: Um Risco Para O Estuário?unclassified

Estudo da abundância, proveniência e padrões de distribuição elementar em sedimentos de superfície e perfis sedimentares no Complexo Estuarino-Lagunar de Cananéia-Iguape, São Paulo - Brasil, com ênfase aos elementos terras raras e seu significado ambiental

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Rare earth elements geochemistry in surface floodplain sediments from the Xiangjiang River, middle reach of Changjiang River, China

Cited by 52 publications

References 45 publications

Origin, distribution, and behaviour of rare earth elements in river bed sediments from a carbonate semi-arid basin (Tafna River, Algeria)

Origin, distribution, and behaviour of rare earth elements in river bed sediments from a carbonate semi-arid basin (Tafna River, Algeria)

Revisit of rare earth element fractionation during chemical weathering and river sediment transport

Estudo da abundância, proveniência e padrões de distribuição elementar em sedimentos de superfície e perfis sedimentares no Complexo Estuarino-Lagunar de Cananéia-Iguape, São Paulo - Brasil, com ênfase aos elementos terras raras e seu significado ambiental

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