@article{fdi:010075269,
  title = {{E}valuation of redox-sensitive metals in marine surface sediments influenced by the oxygen minimum zone of the {H}umboldt {C}urrent {S}ystem, {N}orthern {C}hile},
  author = {{C}astillo, {A}. and {V}aldes, {J}. and {S}ifeddine, {A}bdelfettah and {V}ega, {S}. {E}. and {D}iaz-{O}choa, {J}. and {M}arambio, {Y}.},
  editor = {},
  language = {{ENG}},
  abstract = {{U}pwelling coastal systems can be used to understand how dissolved oxygen and biological productivity control the accumulation of redox-sensitive metals in marine sediments. {T}he aluminium ({A}l), cadmium ({C}d), iron ({F}e), nickel ({N}i), molybdenum ({M}o), vanadium ({V}), total organic carbon ({TOC}), total nitrogen ({TN}) and total sulfur ({TS}) contents in surficial sediment collected from different water depths (30, 70, and 120 m) in three northern {C}hilean bays influenced by coastal upwelling and oxygen minimum zones ({OMZ}s) were measured. {P}rincipal component analysis ({PCA}), cluster analysis, and {S}pearman's rank correlation were used to identify the mechanisms responsible for the redox-sensitive metal accumulation. {T}he content of redox-sensitive metals and organic components in sediment increased with increasing water column depth, whereas lithogenic metals decreased. {I}n the {M}ejillones del {S}ur and {C}aldera bays, the enrichment factors of the redox-sensitive metals showed enrichment for all metals with depth. {T}he {C}d and {V} enrichments are mainly the product of biogenic flow to the seabed, and the {M}o and {N}i enrichments are due to preservation under low subsurface oxygen conditions. {S}ulfate reduction is not an important mechanism in the accumulation of redox-sensitive metals in the sediment of the three bays. {T}he {PCA} showed that the behaviors of the redox-sensitive metals and organic components reflect differences in the effects of the {OMZ} in sediment along the coast of northern {C}hile, with a more intense {OMZ} in {M}ejillones del {S}ur bay and weaker {OMZ}s in {C}aldera and {I}nglesa bays. {H}owever, the high degree of enrichment in redox-sensitive metals in {C}aldera {B}ay can be attributed to the intense activity of the mining industry near the bay, a situation that produces geochemical behavior similar to that observed in {M}ejillones del {S}ur {B}ay.},
  keywords = {{R}edox sensitive-metals ; {A}tacama {D}esert ; {E}nrichment factor ; {M}ejillones del {S}ur {B}ay ; {C}aldera {B}ay system ; {PCA} ; {CHILI} ; {ATACAMA} ; {PACIFIQUE}},
  booktitle = {},
  journal = {{I}nternational {J}ournal of {S}ediment {R}esearch},
  volume = {34},
  numero = {2},
  pages = {178--190},
  ISSN = {1001-6279},
  year = {2019},
  DOI = {10.1016/j.ijsrc.2018.08.005},
  URL = {https://www.documentation.ird.fr/hor/fdi:010075269},
}