Rare earth elements in sediments of the Vigo Ria, NW Iberian Peninsula

Ricardo Prego; Miguel Caetano; Carlos Vale; Judith Marmolejo-Rodríguez

doi:10.1016/j.csr.2009.01.009

Rare earth elements in sediments of the Vigo Ria, NW Iberian Peninsula

Ricardo Prego, Miguel Caetano, Carlos Vale, Judith Marmolejo-Rodríguez

Research output: Contribution to journal › Article › peer-review

52 Scopus citations

Abstract

The abundance and distribution of rare earth elements (REE) and their signatures in the Vigo Ria were studied from 50 samples of surface sediments and related to the geological formation in its watershed. The total amount of REE in the Ria is heterogeneous. It ranges from 220 mg kg^-1 in the southern middle Ria margin in the vicinity of the Galiñeiro geological shore complex, which contains REE-enriched minerals, to 2 mg kg^-1 near the Ria mouth due to dilution with high levels of carbonated biogenic particles (31% of Ca). Rare earth elements of the Ria sediments are considerably enriched in light-REE relative to heavy-REE (a LREE/HREE ratio of 9.7±1.6) and also show a slightly negative Eu-anomaly. Low European shale normalised REE patterns were distinguished in the innermost sediments of Vigo Ria, but were not correlated with Al. This suggests a minor contribution of REE from upstream freshwater inputs to the sediments in the middle Vigo Ria zone. Normalised REE ratios in the middle Ria imply that fine particles enriched in REE may be exported from the Ria to shelf mud patches and REE can be useful as sediment tracers of Ria input on the shelf.

Original language	English
Pages (from-to)	896-902
Number of pages	7
Journal	Continental Shelf Research
Volume	29
Issue number	7
DOIs	https://doi.org/10.1016/j.csr.2009.01.009
State	Published - 15 Apr 2009
Externally published	Yes

Keywords

Coastal zone
LOICZ
Lanthanides
REE
Sediment
Spain
Tracer

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10.1016/j.csr.2009.01.009

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title = "Rare earth elements in sediments of the Vigo Ria, NW Iberian Peninsula",

abstract = "The abundance and distribution of rare earth elements (REE) and their signatures in the Vigo Ria were studied from 50 samples of surface sediments and related to the geological formation in its watershed. The total amount of REE in the Ria is heterogeneous. It ranges from 220 mg kg-1 in the southern middle Ria margin in the vicinity of the Gali{\~n}eiro geological shore complex, which contains REE-enriched minerals, to 2 mg kg-1 near the Ria mouth due to dilution with high levels of carbonated biogenic particles (31% of Ca). Rare earth elements of the Ria sediments are considerably enriched in light-REE relative to heavy-REE (a LREE/HREE ratio of 9.7±1.6) and also show a slightly negative Eu-anomaly. Low European shale normalised REE patterns were distinguished in the innermost sediments of Vigo Ria, but were not correlated with Al. This suggests a minor contribution of REE from upstream freshwater inputs to the sediments in the middle Vigo Ria zone. Normalised REE ratios in the middle Ria imply that fine particles enriched in REE may be exported from the Ria to shelf mud patches and REE can be useful as sediment tracers of Ria input on the shelf.",

keywords = "Coastal zone, LOICZ, Lanthanides, REE, Sediment, Spain, Tracer",

author = "Ricardo Prego and Miguel Caetano and Carlos Vale and Judith Marmolejo-Rodr{\'i}guez",

note = "Funding Information: The authors would like to express their gratitude to the crew of R/V Mytilus for their kind cooperation during sampling, and to Ms. Hilda de Pablo and Ms. Paula Ferro for their technical assistance. Also we thank the kind and valuable manuscript comments of Dr. N.J.G. Pearce (University of Wales, UK), Dr. D. Huntley (University of Plymouth, UK) and two anonymous reviewers. This article is a contribution to the Spanish–LOICZ programme, funded by the CICYT coordinate project “Biogeochemical budget and modelling of metal fluxes in a Galician ria (METRIA)”, ref. REN2003-04106-C03.",

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T1 - Rare earth elements in sediments of the Vigo Ria, NW Iberian Peninsula

AU - Prego, Ricardo

AU - Caetano, Miguel

AU - Vale, Carlos

AU - Marmolejo-Rodríguez, Judith

N1 - Funding Information: The authors would like to express their gratitude to the crew of R/V Mytilus for their kind cooperation during sampling, and to Ms. Hilda de Pablo and Ms. Paula Ferro for their technical assistance. Also we thank the kind and valuable manuscript comments of Dr. N.J.G. Pearce (University of Wales, UK), Dr. D. Huntley (University of Plymouth, UK) and two anonymous reviewers. This article is a contribution to the Spanish–LOICZ programme, funded by the CICYT coordinate project “Biogeochemical budget and modelling of metal fluxes in a Galician ria (METRIA)”, ref. REN2003-04106-C03.

PY - 2009/4/15

Y1 - 2009/4/15

N2 - The abundance and distribution of rare earth elements (REE) and their signatures in the Vigo Ria were studied from 50 samples of surface sediments and related to the geological formation in its watershed. The total amount of REE in the Ria is heterogeneous. It ranges from 220 mg kg-1 in the southern middle Ria margin in the vicinity of the Galiñeiro geological shore complex, which contains REE-enriched minerals, to 2 mg kg-1 near the Ria mouth due to dilution with high levels of carbonated biogenic particles (31% of Ca). Rare earth elements of the Ria sediments are considerably enriched in light-REE relative to heavy-REE (a LREE/HREE ratio of 9.7±1.6) and also show a slightly negative Eu-anomaly. Low European shale normalised REE patterns were distinguished in the innermost sediments of Vigo Ria, but were not correlated with Al. This suggests a minor contribution of REE from upstream freshwater inputs to the sediments in the middle Vigo Ria zone. Normalised REE ratios in the middle Ria imply that fine particles enriched in REE may be exported from the Ria to shelf mud patches and REE can be useful as sediment tracers of Ria input on the shelf.

AB - The abundance and distribution of rare earth elements (REE) and their signatures in the Vigo Ria were studied from 50 samples of surface sediments and related to the geological formation in its watershed. The total amount of REE in the Ria is heterogeneous. It ranges from 220 mg kg-1 in the southern middle Ria margin in the vicinity of the Galiñeiro geological shore complex, which contains REE-enriched minerals, to 2 mg kg-1 near the Ria mouth due to dilution with high levels of carbonated biogenic particles (31% of Ca). Rare earth elements of the Ria sediments are considerably enriched in light-REE relative to heavy-REE (a LREE/HREE ratio of 9.7±1.6) and also show a slightly negative Eu-anomaly. Low European shale normalised REE patterns were distinguished in the innermost sediments of Vigo Ria, but were not correlated with Al. This suggests a minor contribution of REE from upstream freshwater inputs to the sediments in the middle Vigo Ria zone. Normalised REE ratios in the middle Ria imply that fine particles enriched in REE may be exported from the Ria to shelf mud patches and REE can be useful as sediment tracers of Ria input on the shelf.

KW - Coastal zone

KW - LOICZ

KW - Lanthanides

KW - REE

KW - Sediment

KW - Spain

KW - Tracer

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U2 - 10.1016/j.csr.2009.01.009

DO - 10.1016/j.csr.2009.01.009

M3 - Artículo

SN - 0278-4343

VL - 29

SP - 896

EP - 902

JO - Continental Shelf Research

JF - Continental Shelf Research

IS - 7

ER -

Rare earth elements in sediments of the Vigo Ria, NW Iberian Peninsula

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Keywords

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