Nitrogen and organic carbon isotope record in Tremadocian highly metalliferous black shales from Baltica
Tremadocian highly metalliferous black shales and associated grey shales from the Aseri PH012B drill core (NE Estonia) in the innermost part of the Baltic Palaeobasin were targeted to record their nitrogen and organic carbon isotope variance combined with the total organic carbon and total nitrogen...
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| Format: | Article |
| Language: | English |
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Estonian Academy Publishers
2023-06-01
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| Series: | Estonian Journal of Earth Sciences |
| Subjects: | |
| Online Access: | https://kirj.ee/wp-content/plugins/kirj/pub/earth-1-2023-78-81_20230612122227.pdf |
| _version_ | 1797804385416249344 |
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| author | Mawo Ndiaye Merlin Liiv Toivo Kallaste Sophie Graul Rutt Hints |
| author_facet | Mawo Ndiaye Merlin Liiv Toivo Kallaste Sophie Graul Rutt Hints |
| author_sort | Mawo Ndiaye |
| collection | DOAJ |
| description | Tremadocian highly metalliferous black shales and associated grey shales from the Aseri PH012B drill core (NE Estonia) in the innermost part of the Baltic Palaeobasin were targeted to record their nitrogen and organic carbon isotope variance combined with the total organic carbon and total nitrogen record. The obtained molar C/N ratios of black shales from 26 to 52 indicate a considerable loss of N compared to primary biomass. The recorded δ15N values from â2.5 to 0.2â° likely evolved due to isotopic fractionation related to N2 fixation by primary producers, superimposed by later anoxic ammonium oxidation processes within the uppermost sediments. The high net primary productivity, which controlled the accumulation of organic-rich shallow-water complexes, was fuelled by the internal cycling of P in the sea basin and combined with intensive N exchange between marine and atmospheric pools. |
| first_indexed | 2024-03-13T05:36:24Z |
| format | Article |
| id | doaj.art-40345950ef7e4dc2b6468c7826fbc51f |
| institution | Directory Open Access Journal |
| issn | 1736-4728 1736-7557 |
| language | English |
| last_indexed | 2024-03-13T05:36:24Z |
| publishDate | 2023-06-01 |
| publisher | Estonian Academy Publishers |
| record_format | Article |
| series | Estonian Journal of Earth Sciences |
| spelling | doaj.art-40345950ef7e4dc2b6468c7826fbc51f2023-06-14T07:33:30ZengEstonian Academy PublishersEstonian Journal of Earth Sciences1736-47281736-75572023-06-017217881https://doi.org/10.3176/earth.2023.25https://doi.org/10.3176/earth.2023.25Nitrogen and organic carbon isotope record in Tremadocian highly metalliferous black shales from BalticaMawo Ndiaye0Merlin Liiv1Toivo Kallaste2Sophie Graul3Rutt Hints4Department of Geology, Tallinn University of Technology, Ehitajate 5, 19086 Tallinn, EstoniaDepartment of Geology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia; merlin.liiv@ttu.eeDepartment of Geology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia; toivo.kallaste@taltech.eeDepartment of Geology, Tallinn University of Technology, Ehitajate 5, 19086 Tallinn, EstoniaDepartment of Geology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia; rutt.hints@taltech.eeTremadocian highly metalliferous black shales and associated grey shales from the Aseri PH012B drill core (NE Estonia) in the innermost part of the Baltic Palaeobasin were targeted to record their nitrogen and organic carbon isotope variance combined with the total organic carbon and total nitrogen record. The obtained molar C/N ratios of black shales from 26 to 52 indicate a considerable loss of N compared to primary biomass. The recorded δ15N values from â2.5 to 0.2â° likely evolved due to isotopic fractionation related to N2 fixation by primary producers, superimposed by later anoxic ammonium oxidation processes within the uppermost sediments. The high net primary productivity, which controlled the accumulation of organic-rich shallow-water complexes, was fuelled by the internal cycling of P in the sea basin and combined with intensive N exchange between marine and atmospheric pools.https://kirj.ee/wp-content/plugins/kirj/pub/earth-1-2023-78-81_20230612122227.pdftremadocianblack shalenitrogen isotopescarbon isotopesbaltica |
| spellingShingle | Mawo Ndiaye Merlin Liiv Toivo Kallaste Sophie Graul Rutt Hints Nitrogen and organic carbon isotope record in Tremadocian highly metalliferous black shales from Baltica Estonian Journal of Earth Sciences tremadocian black shale nitrogen isotopes carbon isotopes baltica |
| title | Nitrogen and organic carbon isotope record in Tremadocian highly metalliferous black shales from Baltica |
| title_full | Nitrogen and organic carbon isotope record in Tremadocian highly metalliferous black shales from Baltica |
| title_fullStr | Nitrogen and organic carbon isotope record in Tremadocian highly metalliferous black shales from Baltica |
| title_full_unstemmed | Nitrogen and organic carbon isotope record in Tremadocian highly metalliferous black shales from Baltica |
| title_short | Nitrogen and organic carbon isotope record in Tremadocian highly metalliferous black shales from Baltica |
| title_sort | nitrogen and organic carbon isotope record in tremadocian highly metalliferous black shales from baltica |
| topic | tremadocian black shale nitrogen isotopes carbon isotopes baltica |
| url | https://kirj.ee/wp-content/plugins/kirj/pub/earth-1-2023-78-81_20230612122227.pdf |
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