Geochemical phases of Fe and degree of pyritization in sediments from Ría de Pontevedra (NW Spain): Implications of mussel raft culture
To assess the influence of mussel raft systems on several geochemical and sedimentological properties (carbonate and organic matter contents, fractions of Fe and degree of pyritization), six sediment cores were collected from the Ría de Pontevedra area. Four of those cores were collected in mussel...
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Baja California
2004-03-01
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| Series: | Ciencias Marinas |
| Subjects: | |
| Online Access: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/340 |
| _version_ | 1797279406725529600 |
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| author | I León G Méndez B Rubio |
| author_facet | I León G Méndez B Rubio |
| author_sort | I León |
| collection | DOAJ |
| description |
To assess the influence of mussel raft systems on several geochemical and sedimentological properties (carbonate and organic matter contents, fractions of Fe and degree of pyritization), six sediment cores were collected from the Ría de Pontevedra area. Four of those cores were collected in mussel raft areas (biodeposits) and the other two in adjacent areas where mussel rafts do not operate. The degree of pyritization (DOP) varied between 11.89% and 67.30%, with a mean value of 46.36 ± 13.15%. The maximum values of DOP were obtained in sediments from the mussel raft areas, which in turn showed higher values of pyrite Fe, organic matter and mud than the areas without mussel rafts. On the contrary, in the latter areas, coarser sediments with high carbonate content and Fe bound to silicates were the predominant phases. The results show a dominance of more reducing conditions in the biodeposit areas than in the adjacent areas. The DOP values indicate that reactive Fe was not totally converted to pyrite Fe. The significant correlation (r = 0.61) between DOP and organic matter confirmed that the latter is the limiting factor in pyrite genesis. These results allow us to conclude that mussel raft culture significantly changes the sediment texture and geochemical forms of Fe, with the consequent geochemical and environmental implications.
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| first_indexed | 2024-03-07T16:24:52Z |
| format | Article |
| id | doaj.art-a5afaa5d13e64db4bb6362f72315632e |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:24:52Z |
| publishDate | 2004-03-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-a5afaa5d13e64db4bb6362f72315632e2024-03-03T18:37:44ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90532004-03-0130410.7773/cm.v30i4.340Geochemical phases of Fe and degree of pyritization in sediments from Ría de Pontevedra (NW Spain): Implications of mussel raft cultureI León0G Méndez1B Rubio2Universidad del AtlánticoUniversidad de VigoUniversidad de Vigo To assess the influence of mussel raft systems on several geochemical and sedimentological properties (carbonate and organic matter contents, fractions of Fe and degree of pyritization), six sediment cores were collected from the Ría de Pontevedra area. Four of those cores were collected in mussel raft areas (biodeposits) and the other two in adjacent areas where mussel rafts do not operate. The degree of pyritization (DOP) varied between 11.89% and 67.30%, with a mean value of 46.36 ± 13.15%. The maximum values of DOP were obtained in sediments from the mussel raft areas, which in turn showed higher values of pyrite Fe, organic matter and mud than the areas without mussel rafts. On the contrary, in the latter areas, coarser sediments with high carbonate content and Fe bound to silicates were the predominant phases. The results show a dominance of more reducing conditions in the biodeposit areas than in the adjacent areas. The DOP values indicate that reactive Fe was not totally converted to pyrite Fe. The significant correlation (r = 0.61) between DOP and organic matter confirmed that the latter is the limiting factor in pyrite genesis. These results allow us to conclude that mussel raft culture significantly changes the sediment texture and geochemical forms of Fe, with the consequent geochemical and environmental implications. https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/340degree of pyritizationRía de Pontevedrareactive ironpyrite ironmussel rafts |
| spellingShingle | I León G Méndez B Rubio Geochemical phases of Fe and degree of pyritization in sediments from Ría de Pontevedra (NW Spain): Implications of mussel raft culture Ciencias Marinas degree of pyritization Ría de Pontevedra reactive iron pyrite iron mussel rafts |
| title | Geochemical phases of Fe and degree of pyritization in sediments from Ría de Pontevedra (NW Spain): Implications of mussel raft culture |
| title_full | Geochemical phases of Fe and degree of pyritization in sediments from Ría de Pontevedra (NW Spain): Implications of mussel raft culture |
| title_fullStr | Geochemical phases of Fe and degree of pyritization in sediments from Ría de Pontevedra (NW Spain): Implications of mussel raft culture |
| title_full_unstemmed | Geochemical phases of Fe and degree of pyritization in sediments from Ría de Pontevedra (NW Spain): Implications of mussel raft culture |
| title_short | Geochemical phases of Fe and degree of pyritization in sediments from Ría de Pontevedra (NW Spain): Implications of mussel raft culture |
| title_sort | geochemical phases of fe and degree of pyritization in sediments from ria de pontevedra nw spain implications of mussel raft culture |
| topic | degree of pyritization Ría de Pontevedra reactive iron pyrite iron mussel rafts |
| url | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/340 |
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