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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2008
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| Online Access: | https://doi.org/10.1594/PANGAEA.807182 |
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| _version_ | 1867172222881234944 |
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| author | Eisele, Markus Hermann Hebbeln, Dierk Wienberg, Claudia |
| author_facet | Eisele, Markus Hermann Hebbeln, Dierk Wienberg, Claudia |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | During the past decade, knowledge about the ecology and the environment of giant carbonate mounds has been growing continuously. However, still little is known about their growth dynamics. Three gravity cores from Galway Mound, Belgica Mound Province in the Porcupine Seabight off Ireland, were investigated for their sedimentological, geophysical and geochemical properties to get insight into the long-term development of this cold-water coral covered carbonate mound. These data were supplemented by radiometric age determinations on planktonic foraminifera and coral skeletons. The records from three different settings on Galway Mound reveal a coherent growth history that in general is similar to what is known from other carbonate mounds at the Irish margin. However, whereas other cores are often disturbed by numerous and not correlateable hiatuses, Galway Mound, in contrast, appears to be characterised by only one major hiatus representing a time gap of ~ 250 kyr. Several mechanisms are discussed in this study as possible causes for the observed stratigraphic record at Galway Mound. The most likely explanation is that the hiatus has its origin in a major mass wasting event on an instable, possibly glacial, unit that could have acted as a slip plane. The overall Late Quaternary growth history of Galway Mound fits well into existing cyclical mound development models, pointing to Galway Mound being an 'actively growing' mound ("coral bank stage") at present. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_807182 |
| institution | PANGAEA |
| language | en |
| publishDate | 2008 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Sediment analyses of three sediment cores from Galway Mound, NE-Atlantik Eisele, Markus Hermann Hebbeln, Dierk Wienberg, Claudia Center for Marine Environmental Sciences; HERMES; Hotspot Ecosystem Research on the Margins of European Seas; MARUM During the past decade, knowledge about the ecology and the environment of giant carbonate mounds has been growing continuously. However, still little is known about their growth dynamics. Three gravity cores from Galway Mound, Belgica Mound Province in the Porcupine Seabight off Ireland, were investigated for their sedimentological, geophysical and geochemical properties to get insight into the long-term development of this cold-water coral covered carbonate mound. These data were supplemented by radiometric age determinations on planktonic foraminifera and coral skeletons. The records from three different settings on Galway Mound reveal a coherent growth history that in general is similar to what is known from other carbonate mounds at the Irish margin. However, whereas other cores are often disturbed by numerous and not correlateable hiatuses, Galway Mound, in contrast, appears to be characterised by only one major hiatus representing a time gap of ~ 250 kyr. Several mechanisms are discussed in this study as possible causes for the observed stratigraphic record at Galway Mound. The most likely explanation is that the hiatus has its origin in a major mass wasting event on an instable, possibly glacial, unit that could have acted as a slip plane. The overall Late Quaternary growth history of Galway Mound fits well into existing cyclical mound development models, pointing to Galway Mound being an 'actively growing' mound ("coral bank stage") at present. |
| title | Sediment analyses of three sediment cores from Galway Mound, NE-Atlantik |
| topic | Center for Marine Environmental Sciences; HERMES; Hotspot Ecosystem Research on the Margins of European Seas; MARUM |
| url | https://doi.org/10.1594/PANGAEA.807182 |