Geochemical characteristics from tests of four modern planktonic foraminiferal species in the Indonesian Throughflow region and their implications
Test geochemistry of planktonic foraminifera is an indispensable tool in reconstructing past ocean hydrological changes. It is essential to investigate region-specific implications of test geochemistry, although those established from other regions can be broadly applied. In this study, characterist...
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ftdoajarticles:oai:doaj.org/article:0cfcfc073e774fb782beee559e869dd8 2023-10-09T21:55:26+02:00 Geochemical characteristics from tests of four modern planktonic foraminiferal species in the Indonesian Throughflow region and their implications Peng Zhang Rina Zuraida Yair Rosenthal Ann Holbourn Wolfgang Kuhnt Jian Xu 2019-03-01T00:00:00Z https://doi.org/10.1016/j.gsf.2018.01.011 https://doaj.org/article/0cfcfc073e774fb782beee559e869dd8 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S1674987118300471 https://doaj.org/toc/1674-9871 1674-9871 doi:10.1016/j.gsf.2018.01.011 https://doaj.org/article/0cfcfc073e774fb782beee559e869dd8 Geoscience Frontiers, Vol 10, Iss 2, Pp 505-516 (2019) Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.1016/j.gsf.2018.01.011 2023-09-10T00:44:52Z Test geochemistry of planktonic foraminifera is an indispensable tool in reconstructing past ocean hydrological changes. It is essential to investigate region-specific implications of test geochemistry, although those established from other regions can be broadly applied. In this study, characteristics of δ18O and Mg/Ca from tests of four planktonic foraminiferal species, Globigerinoides ruber sensu stricto (s.s.), Globigerinoides sacculifer, Pulleniatina obliquiloculata and Neogloboquadrina dutertrei, from 60 core-top sediment samples retrieved from the Indonesian Throughflow (ITF) region were studied. These geochemical data were compared with modern hydrographic profiles in order to assess their relations and to investigate potential implications of test geochemical parameters in reconstructing past oceanographic change in the ITF region. Calcification depths of these four species were first estimated based on comparison between measured test δ18O and predicted calcite δ18O that was calculated from modern temperature and salinity. The results indicate that G. ruber s.s. and G. sacculifer calcify within the mixed-layer at 0–50 m and 20–75 m, respectively, whereas P. obliquiloculata and N. dutertrei calcify within the thermocline at around 75 to 125 m. A combined study of excess Mg/Ca (difference between measured and predicted Mg/Ca) and salinity suggests that salinity exerts a negligible impact on test Mg/Ca of these foraminiferal species in the ITF region. Comparison of test Mg/Ca-derived temperatures with temperature profiles of the upper 200 m of the water column from the seas of the ITF region also indicate calcification depths of these species, which match well with the above estimations using test δ18O. It further indicates that G. sacculifer may be more sensitive in reflecting changes in the depth of the mixed-layer, highlighting a potential use of Mg/Ca temperature difference between G. ruber s.s. and G. sacculifer in reconstructing the depth of the mixed-layer in the ITF region. Keywords: Test ... Article in Journal/Newspaper Planktonic foraminifera Directory of Open Access Journals: DOAJ Articles Geoscience Frontiers 10 2 505 516 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 Peng Zhang Rina Zuraida Yair Rosenthal Ann Holbourn Wolfgang Kuhnt Jian Xu Geochemical characteristics from tests of four modern planktonic foraminiferal species in the Indonesian Throughflow region and their implications |
topic_facet |
Geology QE1-996.5 |
description |
Test geochemistry of planktonic foraminifera is an indispensable tool in reconstructing past ocean hydrological changes. It is essential to investigate region-specific implications of test geochemistry, although those established from other regions can be broadly applied. In this study, characteristics of δ18O and Mg/Ca from tests of four planktonic foraminiferal species, Globigerinoides ruber sensu stricto (s.s.), Globigerinoides sacculifer, Pulleniatina obliquiloculata and Neogloboquadrina dutertrei, from 60 core-top sediment samples retrieved from the Indonesian Throughflow (ITF) region were studied. These geochemical data were compared with modern hydrographic profiles in order to assess their relations and to investigate potential implications of test geochemical parameters in reconstructing past oceanographic change in the ITF region. Calcification depths of these four species were first estimated based on comparison between measured test δ18O and predicted calcite δ18O that was calculated from modern temperature and salinity. The results indicate that G. ruber s.s. and G. sacculifer calcify within the mixed-layer at 0–50 m and 20–75 m, respectively, whereas P. obliquiloculata and N. dutertrei calcify within the thermocline at around 75 to 125 m. A combined study of excess Mg/Ca (difference between measured and predicted Mg/Ca) and salinity suggests that salinity exerts a negligible impact on test Mg/Ca of these foraminiferal species in the ITF region. Comparison of test Mg/Ca-derived temperatures with temperature profiles of the upper 200 m of the water column from the seas of the ITF region also indicate calcification depths of these species, which match well with the above estimations using test δ18O. It further indicates that G. sacculifer may be more sensitive in reflecting changes in the depth of the mixed-layer, highlighting a potential use of Mg/Ca temperature difference between G. ruber s.s. and G. sacculifer in reconstructing the depth of the mixed-layer in the ITF region. Keywords: Test ... |
format |
Article in Journal/Newspaper |
author |
Peng Zhang Rina Zuraida Yair Rosenthal Ann Holbourn Wolfgang Kuhnt Jian Xu |
author_facet |
Peng Zhang Rina Zuraida Yair Rosenthal Ann Holbourn Wolfgang Kuhnt Jian Xu |
author_sort |
Peng Zhang |
title |
Geochemical characteristics from tests of four modern planktonic foraminiferal species in the Indonesian Throughflow region and their implications |
title_short |
Geochemical characteristics from tests of four modern planktonic foraminiferal species in the Indonesian Throughflow region and their implications |
title_full |
Geochemical characteristics from tests of four modern planktonic foraminiferal species in the Indonesian Throughflow region and their implications |
title_fullStr |
Geochemical characteristics from tests of four modern planktonic foraminiferal species in the Indonesian Throughflow region and their implications |
title_full_unstemmed |
Geochemical characteristics from tests of four modern planktonic foraminiferal species in the Indonesian Throughflow region and their implications |
title_sort |
geochemical characteristics from tests of four modern planktonic foraminiferal species in the indonesian throughflow region and their implications |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://doi.org/10.1016/j.gsf.2018.01.011 https://doaj.org/article/0cfcfc073e774fb782beee559e869dd8 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Geoscience Frontiers, Vol 10, Iss 2, Pp 505-516 (2019) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S1674987118300471 https://doaj.org/toc/1674-9871 1674-9871 doi:10.1016/j.gsf.2018.01.011 https://doaj.org/article/0cfcfc073e774fb782beee559e869dd8 |
op_doi |
https://doi.org/10.1016/j.gsf.2018.01.011 |
container_title |
Geoscience Frontiers |
container_volume |
10 |
container_issue |
2 |
container_start_page |
505 |
op_container_end_page |
516 |
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1779319337689022464 |