Micropaleontological investigation of sediment core Kronsmoor
Benthic foraminiferal and calcareous nannofossil assemblages, as well as stable isotope data from the Campanian/Maastrichtian boundary interval (~71.4 to ~70.7 Ma) of the Kronsmoor section (North German Basin), were investigated in order to characterize changes in surface-water productivity and oxyg...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.736977 2023-05-15T17:35:58+02:00 Micropaleontological investigation of sediment core Kronsmoor Friedrich, Oliver Herrle, Jens O Hemleben, Christoph LATITUDE: 53.900000 * LONGITUDE: 9.580000 * DATE/TIME START: 2000-09-01T12:00:00 * DATE/TIME END: 2000-09-01T12:00:00 2005-04-21 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.736977 https://doi.org/10.1594/PANGAEA.736977 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.736977 https://doi.org/10.1594/PANGAEA.736977 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Friedrich, Oliver; Herrle, Jens O; Hemleben, Christoph (2005): Climatic changes in the Late Campanian through Early Maastrichtian: micropaleontological and stable isotopic evidence from an epicontinental sea. Journal of Foraminiferal Research, 35(3), 228-247, https://doi.org/10.2113/35.3.228 Germany North Kronsmoor MULT Multiple investigations Dataset 2005 ftpangaea https://doi.org/10.1594/PANGAEA.736977 https://doi.org/10.2113/35.3.228 2023-01-20T07:31:45Z Benthic foraminiferal and calcareous nannofossil assemblages, as well as stable isotope data from the Campanian/Maastrichtian boundary interval (~71.4 to ~70.7 Ma) of the Kronsmoor section (North German Basin), were investigated in order to characterize changes in surface-water productivity and oxygen content at the seafloor and their link to climatic and paleoceanographic changes. A nutrient index based on calcareous nannofossils is derived for the high-latitude, epicontinental North German Basin, reflecting changes in surface-water productivity. Oxygen isotopes of well-preserved planktic foraminiferal specimens of Heterohelix globulosa reflect warmer surface-water temperatures in the lower part of the studied succession and a cooling of up to 2°C (0.5 per mil) in the upper part (after 71.1 Ma). For the lower and warmer part of the investigated succession, benthic foraminiferal assemblages and the calcareous nannofossils indicate well-oxygenated bottom waters and low-surface water productivity. In contrast, the upper part of the succession is characterized by cooler conditions, lower oxygen content at the seafloor and increasing surface-water productivity. It is proposed that the cooling phase starting at 71.1 Ma was accompanied by increasing surface-water mixing caused by westerly winds. As a consequence of mixing, nutrients were advected from sub-surface waters into the mixed layer, resulting in increased surface-water productivity and enhanced organic matter flux to the seafloor. We hypothesize that global sea-level fall during the earliest Maastrichtian (~71.3 Ma), indicated by decreasing carbon isotope values, may have led to a weaker water mass exchange through narrower gateways between the Boreal Realm and the open North Atlantic and Tethys oceans. Both the weaker water mass exchange and enhanced surface-water productivity may have led to slightly less ventilated bottom waters of the upper part of the studied section. Our micro-paleontological and stable isotopic approach indicates short-term (<100 ... Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(9.580000,9.580000,53.900000,53.900000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Germany North Kronsmoor MULT Multiple investigations |
spellingShingle |
Germany North Kronsmoor MULT Multiple investigations Friedrich, Oliver Herrle, Jens O Hemleben, Christoph Micropaleontological investigation of sediment core Kronsmoor |
topic_facet |
Germany North Kronsmoor MULT Multiple investigations |
description |
Benthic foraminiferal and calcareous nannofossil assemblages, as well as stable isotope data from the Campanian/Maastrichtian boundary interval (~71.4 to ~70.7 Ma) of the Kronsmoor section (North German Basin), were investigated in order to characterize changes in surface-water productivity and oxygen content at the seafloor and their link to climatic and paleoceanographic changes. A nutrient index based on calcareous nannofossils is derived for the high-latitude, epicontinental North German Basin, reflecting changes in surface-water productivity. Oxygen isotopes of well-preserved planktic foraminiferal specimens of Heterohelix globulosa reflect warmer surface-water temperatures in the lower part of the studied succession and a cooling of up to 2°C (0.5 per mil) in the upper part (after 71.1 Ma). For the lower and warmer part of the investigated succession, benthic foraminiferal assemblages and the calcareous nannofossils indicate well-oxygenated bottom waters and low-surface water productivity. In contrast, the upper part of the succession is characterized by cooler conditions, lower oxygen content at the seafloor and increasing surface-water productivity. It is proposed that the cooling phase starting at 71.1 Ma was accompanied by increasing surface-water mixing caused by westerly winds. As a consequence of mixing, nutrients were advected from sub-surface waters into the mixed layer, resulting in increased surface-water productivity and enhanced organic matter flux to the seafloor. We hypothesize that global sea-level fall during the earliest Maastrichtian (~71.3 Ma), indicated by decreasing carbon isotope values, may have led to a weaker water mass exchange through narrower gateways between the Boreal Realm and the open North Atlantic and Tethys oceans. Both the weaker water mass exchange and enhanced surface-water productivity may have led to slightly less ventilated bottom waters of the upper part of the studied section. Our micro-paleontological and stable isotopic approach indicates short-term (<100 ... |
format |
Dataset |
author |
Friedrich, Oliver Herrle, Jens O Hemleben, Christoph |
author_facet |
Friedrich, Oliver Herrle, Jens O Hemleben, Christoph |
author_sort |
Friedrich, Oliver |
title |
Micropaleontological investigation of sediment core Kronsmoor |
title_short |
Micropaleontological investigation of sediment core Kronsmoor |
title_full |
Micropaleontological investigation of sediment core Kronsmoor |
title_fullStr |
Micropaleontological investigation of sediment core Kronsmoor |
title_full_unstemmed |
Micropaleontological investigation of sediment core Kronsmoor |
title_sort |
micropaleontological investigation of sediment core kronsmoor |
publisher |
PANGAEA |
publishDate |
2005 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.736977 https://doi.org/10.1594/PANGAEA.736977 |
op_coverage |
LATITUDE: 53.900000 * LONGITUDE: 9.580000 * DATE/TIME START: 2000-09-01T12:00:00 * DATE/TIME END: 2000-09-01T12:00:00 |
long_lat |
ENVELOPE(9.580000,9.580000,53.900000,53.900000) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Friedrich, Oliver; Herrle, Jens O; Hemleben, Christoph (2005): Climatic changes in the Late Campanian through Early Maastrichtian: micropaleontological and stable isotopic evidence from an epicontinental sea. Journal of Foraminiferal Research, 35(3), 228-247, https://doi.org/10.2113/35.3.228 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.736977 https://doi.org/10.1594/PANGAEA.736977 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.736977 https://doi.org/10.2113/35.3.228 |
_version_ |
1766135276910936064 |