Effect of supra-lysoclinal dissolution on oxygen isotopes and Mg/Ca in planktonic foraminifera
Mg/Ca in planktonic foraminiferal tests is now well established as a temperature proxy for surface and near-surface waters. The advantage of using Mg/Ca coupled with oxygen isotope ratio measured on the same foraminiferal sample provides the possibility to determine seawater d18O. There has been con...
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ftopenunivgb:oai:oro.open.ac.uk:26812 2023-06-11T04:16:07+02:00 Effect of supra-lysoclinal dissolution on oxygen isotopes and Mg/Ca in planktonic foraminifera kroon, D. Anand, Pallavi Elderfield, H. Birse, S. E. A. Ganssen, G. 2004 https://oro.open.ac.uk/26812/ http://www.falw.vu/~palmorph/publ/Public~2.htm unknown kroon, D.; Anand, Pallavi <http://oro.open.ac.uk/view/person/pa2398.html>; Elderfield, H.; Birse, S. E. A. and Ganssen, G. (2004). Effect of supra-lysoclinal dissolution on oxygen isotopes and Mg/Ca in planktonic foraminifera. In: 8th International Conference on Paleoceanography, 5-10 Sep 2004, Biarritz. Conference or Workshop Item None NonPeerReviewed 2004 ftopenunivgb 2023-05-28T05:45:51Z Mg/Ca in planktonic foraminiferal tests is now well established as a temperature proxy for surface and near-surface waters. The advantage of using Mg/Ca coupled with oxygen isotope ratio measured on the same foraminiferal sample provides the possibility to determine seawater d18O. There has been concern, however, about the post-mortem processes (e.g., dissolution) affecting foraminiferal Mg/Ca and d18O. We document the effect of dissolution on both Mg/Ca and d18O of several planktonic foraminiferal species along two depth transects (a) ~450-4000 m off Somalia and (b) ~1500-4500 m from Ontong Java Plateau. The planktonic foraminiferal species, Globigerinoides ruber, Globigerinoides sacculifer, Pulleniatina obliquiloculata, Neogloboquadrina dutertrei and Globorotalia tumida were analysed for Mg/Ca and d18O from core-top samples along the depth transects within a narrow size range (e.g., 250-300, 355-425 um). Mg/Ca and d18O in shells of surface dwelling planktonic foraminiferal species (e.g., G. ruber and G. sacculifer) show a small decrease while Mg/Ca and d18O of the deeper dwelling species (e.g., N. dutertrei and G. tumid) show more pronounced effect of supralysoclinal dissolution. The effect of supralysoclinal dissolution has an insignificant effect on the reconstruction of seawater d18O based on surface dwelling planktonic species compared to the deeper dwelling species. Conference Object Planktonic foraminifera The Open University: Open Research Online (ORO) |
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The Open University: Open Research Online (ORO) |
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description |
Mg/Ca in planktonic foraminiferal tests is now well established as a temperature proxy for surface and near-surface waters. The advantage of using Mg/Ca coupled with oxygen isotope ratio measured on the same foraminiferal sample provides the possibility to determine seawater d18O. There has been concern, however, about the post-mortem processes (e.g., dissolution) affecting foraminiferal Mg/Ca and d18O. We document the effect of dissolution on both Mg/Ca and d18O of several planktonic foraminiferal species along two depth transects (a) ~450-4000 m off Somalia and (b) ~1500-4500 m from Ontong Java Plateau. The planktonic foraminiferal species, Globigerinoides ruber, Globigerinoides sacculifer, Pulleniatina obliquiloculata, Neogloboquadrina dutertrei and Globorotalia tumida were analysed for Mg/Ca and d18O from core-top samples along the depth transects within a narrow size range (e.g., 250-300, 355-425 um). Mg/Ca and d18O in shells of surface dwelling planktonic foraminiferal species (e.g., G. ruber and G. sacculifer) show a small decrease while Mg/Ca and d18O of the deeper dwelling species (e.g., N. dutertrei and G. tumid) show more pronounced effect of supralysoclinal dissolution. The effect of supralysoclinal dissolution has an insignificant effect on the reconstruction of seawater d18O based on surface dwelling planktonic species compared to the deeper dwelling species. |
format |
Conference Object |
author |
kroon, D. Anand, Pallavi Elderfield, H. Birse, S. E. A. Ganssen, G. |
spellingShingle |
kroon, D. Anand, Pallavi Elderfield, H. Birse, S. E. A. Ganssen, G. Effect of supra-lysoclinal dissolution on oxygen isotopes and Mg/Ca in planktonic foraminifera |
author_facet |
kroon, D. Anand, Pallavi Elderfield, H. Birse, S. E. A. Ganssen, G. |
author_sort |
kroon, D. |
title |
Effect of supra-lysoclinal dissolution on oxygen isotopes and Mg/Ca in planktonic foraminifera |
title_short |
Effect of supra-lysoclinal dissolution on oxygen isotopes and Mg/Ca in planktonic foraminifera |
title_full |
Effect of supra-lysoclinal dissolution on oxygen isotopes and Mg/Ca in planktonic foraminifera |
title_fullStr |
Effect of supra-lysoclinal dissolution on oxygen isotopes and Mg/Ca in planktonic foraminifera |
title_full_unstemmed |
Effect of supra-lysoclinal dissolution on oxygen isotopes and Mg/Ca in planktonic foraminifera |
title_sort |
effect of supra-lysoclinal dissolution on oxygen isotopes and mg/ca in planktonic foraminifera |
publishDate |
2004 |
url |
https://oro.open.ac.uk/26812/ http://www.falw.vu/~palmorph/publ/Public~2.htm |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
kroon, D.; Anand, Pallavi <http://oro.open.ac.uk/view/person/pa2398.html>; Elderfield, H.; Birse, S. E. A. and Ganssen, G. (2004). Effect of supra-lysoclinal dissolution on oxygen isotopes and Mg/Ca in planktonic foraminifera. In: 8th International Conference on Paleoceanography, 5-10 Sep 2004, Biarritz. |
_version_ |
1768373566222368768 |