RT Journal Article
T1 Distinctive accumulation patterns of trace elements in sediments of bedrock rivers (Miño river, NW Iberian Peninsula)
A1 Álvarez Vázquez, Miguel Ángel
A1 De Uña Alvarez, Elena Pilar
A1 Ramírez Pérez, Alexandra María
A1 De Blas Varela, Maria Esther
A1 Prego, Ricardo
K1 2503 Geoquímica
AB Sediment compositions and enrichment patterns are investigated in an urban reach of a bedrock river, the Miño River passing through Ourense City, Spain. This study focuses on the trace element distribution in different fractions to gain insights into trace element enrichment. To assess enrichment, a context-specific approach was employed, based on the mean, the standard deviation of the estimated background, and the empirical rule, avoiding the pitfalls of general and arbitrary thresholds. Notably, the <0.063 mm and <2 mm fractions showed differential accumulation patterns. Both fractions serve to detect enrichments that can be indicative of contamination, but they measure different things, the maturity of sediments and postdepositional processes being key factors in understanding the sediment composition and enrichments. These findings also highlight the role of rock cavities, particularly those hosting permanent deposits, as traps for trace elements and their potential significance in assessing environmental enrichment. This work contributes to understanding sediment compositions and enrichment dynamics in bedrock rivers. It also underscores the significance of considering site-specific approaches for enrichment assessment and the necessity for further research to unravel the mechanisms driving differential accumulation within distinct depositional environments.
PB Geosciences
SN 20763263
YR 2023
FD 2023-10-19
LK http://hdl.handle.net/11093/5265
UL http://hdl.handle.net/11093/5265
LA eng
NO Geosciences, 13(10): 315 (2023)
NO Universidade de Vigo | Ref. INOU15-02
DS Investigo
RD 25-abr-2025