RT Journal Article
T1 Palaeoenvironmental context and significance of ferruginous tubular bioforms and other authigenic mineral formations in source-to-sink sedimentary systems
A1 López Pérez, Ángel Enrique
A1 Rubio Armesto, Maria Belen
A1 Rey García, Daniel
A1 Plaza Morlote, Maider
K1 2506.18 Sedimentología
K1 2510.90 Geología Marina
K1 251090-1 Geología Marina. Dinámica Sedimentaria
AB Surficial sediments on the seafloor from passive continental margins can provide insight into recent Late Quaternary sedimentary dynamics acting over offshore sedimentary systems. This work focuses on the study of some particular ferruginous tubular structures resembling bioforms (FTB) located in the distal Galician Continental Margin (NW Iberian Margin) at water depths between ~ 1550 and ~ 2200 m. The characterisation of these structures made it possible to study in depth their formation environment and subsequent sedimentary evolution during the Late Pleistocene and Holocene. The FTB consist of goethite with a framboidal texture. They were interpreted as formed by an initial pyrite precipitation in reducing microenvironments conditioned by the activity of sediment-dwelling organisms during the early diagenesis. This is followed by the oxidation of pyrite by a combination of hydrothermal fluids and erosional processes, which triggers the formation of the framboidal oxyhydroxides. The data allowed obtaining a comprehensive understanding of the environmental context and the significance of these ferruginous tubules, as there are no previous studies in the scientific literature that describe these structures in a source-to-sink sedimentary system.
PB Geo-Marine Letters
SN 02760460
YR 2021
FD 2021-12
LK http://hdl.handle.net/11093/3105
UL http://hdl.handle.net/11093/3105
LA eng
NO Geo-Marine Letters, 41(50): (2021)
NO Financiado para publicación en acceso aberto: Universidade de Vigo/CISUG
NO Ministerio de Ciencia e Innovación | Ref. CGL2010-16688
DS Investigo
RD 16-sep-2024