Palaeoenvironmental context and significance of ferruginous tubular bioforms and other authigenic mineral formations in source-to-sink sedimentary systems
| Autor: | López Pérez, Ángel Enrique, Rubio Armesto, Maria Belen, Rey García, Daniel, Plaza Morlote, Maider |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Investigo. Repositorio Institucional de la Universidade de Vigo Universidade de Vigo (UVigo) |
| DOI: | 10.1007/s00367-021-00726-3 |
| Popis: | 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. Financiado para publicación en acceso aberto: Universidade de Vigo/CISUG Ministerio de Ciencia e Innovación | Ref. CGL2010-16688 Agencia Estatal de Investigación | Ref. PID2019-109653RB-I00 Ministerio de Economía y Competitividad | Ref. CTM2007-61227/MAR Xunta de Galicia | Ref. ED481A-2017/301 Xunta de Galicia | Ref. ED481B-2018/058 Xunta de Galicia | Ref. ED431C 2019/27 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|