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dc.contributor.authorSælen, Gunnareng
dc.contributor.authorKristensen, Dorthe Klitgaardeng
dc.contributor.authorWesterlund, Stigeng
dc.contributor.authorJansen, Eysteineng
dc.identifier.citationThe Open Geology Journal 3: 90-97en_US
dc.description.abstractWell-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.publisherBentham Openeng
dc.rightsAttribution-NonCommercial CC BY-NCeng
dc.subjectBenthic foraminiferaeng
dc.subjectPaleowater-depth proxyeng
dc.titleSr/Ca in Calcitic Tests of Benthic Foraminifera - A Potential Water-Depth Proxy?eng
dc.typePeer reviewedeng
dc.typeJournal articleeng
dc.subject.nsiVDP::Mathematics and natural science: 400::Geosciences: 450eng
dc.rights.holderCopyright Sælen et al.; Licensee Bentham Open.
dc.rights.holderSælen et al.eng
bora.peerreviewedPeer reviewedeng

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