dc.contributor.author | Sælen, Gunnar | eng |
dc.contributor.author | Kristensen, Dorthe Klitgaard | eng |
dc.contributor.author | Westerlund, Stig | eng |
dc.contributor.author | Jansen, Eystein | eng |
dc.date.accessioned | 2011-02-09T14:14:49Z | |
dc.date.available | 2011-02-09T14:14:49Z | |
dc.date.issued | 2009 | eng |
dc.Published | The Open Geology Journal 3: 90-97 | en_US |
dc.identifier.uri | https://hdl.handle.net/1956/4489 | |
dc.description.abstract | Well-preserved low-Mg calcite tests of modern benthic foraminifera from a depth transect off SW Norway show decreasing Sr/Ca with increasing water depth (r = –0.84). The Mg/Ca ratios also decrease with increasing water depth, although in a curvilinear fashion. Moreover, the inter- and intra-species scatter is apparently larger than for Sr/Ca. A majority of the analysed specimens have Mn/Ca < 200 μmol/mol, and show Sr/Ca, Mg/Ca that fall within published ranges for benthic foraminiferal calcite, indicating that pristine biogenic calcite has been analysed. The uniform temperature and salinity of bottom waters below ~800 m moreover indicate that neither temperature nor salinity can explain the observed Me/Ca trends. The Sr/Ca and Mg/Ca depth trends cannot be explained by dissolution since bottom waters are generally supersaturated with respect to calcite, and dissolution is only observed in a few specimens. Moreover, a regular increase in sedimentary organic content with depth needed to invoke a decrease in porewater pH and concomittant calcite dissolution is not observed. We tentatively ascribe the decreasing Sr/Ca and Mg/Ca trends to depthrelated physiological phenomena. The relatively small intra- and interspecies scatter at a given water depth, as well as the linear decrease in Sr/Ca ratios with increasing water depth observed in modern oceans, may render the Sr/Ca in calcitic benthic foraminifera a potential water-depth proxy for fossil deposits. | en_US |
dc.language.iso | eng | eng |
dc.publisher | Bentham Open | en_US |
dc.rights | Attribution-NonCommercial CC BY-NC | eng |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/3.0/ | eng |
dc.subject | Benthic foraminifera | eng |
dc.subject | Sr/Ca | eng |
dc.subject | Paleowater-depth proxy | eng |
dc.title | Sr/Ca in Calcitic Tests of Benthic Foraminifera - A Potential Water-Depth Proxy? | en_US |
dc.type | Peer reviewed | |
dc.type | Journal article | |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | Sælen et al. | en_US |
dc.rights.holder | Copyright Sælen et al.; Licensee Bentham Open. | en_US |
dc.identifier.doi | https://doi.org/10.2174/1874262900903010090 | |
dc.subject.nsi | VDP::Mathematics and natural science: 400::Geosciences: 450 | en_US |