The reconstruction of paleoclimate variability in Northern Germany, during marine isotope stage 5
In order to obtain a better understanding about the influence of post-depositional diagenesis on speleothem 230Th/U-ages and paleoclimate variability during Marine Isotope Stage (MIS) 5 in northern Germany, four stalagmites from the Riesenberghöhle (RBH) were investigated by thin section analysis, 2...
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Johannes Gutenberg-Universität Mainz
2013
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ftunivmainzpubl:oai:openscience.ub.uni-mainz.de:20.500.12030/4386 2023-05-15T16:30:23+02:00 The reconstruction of paleoclimate variability in Northern Germany, during marine isotope stage 5 Tolzmann, Jan 2013 https://openscience.ub.uni-mainz.de/handle/20.500.12030/4386 https://hdl.handle.net/20.500.12030/4386 https://doi.org/10.25358/openscience-4384 eng eng Johannes Gutenberg-Universität Mainz http://doi.org/10.25358/openscience-4384 https://openscience.ub.uni-mainz.de/handle/20.500.12030/4386 in Copyright https://rightsstatements.org/vocab/InC/1.0/ openAccess ddc:550 Dissertation publishedVersion Text doc-type:doctoralThesis 2013 ftunivmainzpubl https://doi.org/20.500.12030/4386 https://doi.org/10.25358/openscience-4384 2022-09-15T11:48:16Z In order to obtain a better understanding about the influence of post-depositional diagenesis on speleothem 230Th/U-ages and paleoclimate variability during Marine Isotope Stage (MIS) 5 in northern Germany, four stalagmites from the Riesenberghöhle (RBH) were investigated by thin section analysis, 230Th/U-dating as well as stable oxygen and carbon isotope and laser ablation inductively coupled mass spectrometry (LA-ICPMS) trace element analysis. The RBH is located in the Weser Hills and is one of the northernmost limestone caves in Germany.rnMulti collector (MC) ICPMS 230Th/U-ages and thin section analysis of the RBH stalagmites shows that some growth phases of the stalagmites were diagenetically altered after their deposition. The impact of post-depositional diagenesis (PDD) on the 230Th/U-ages is modeled, and potential processes leading to PDD are discussed. In this context, it is suggested that PDD may be induced by rapid climate change at the inception of the GIS.rnDespite of the dating uncertainties resulting from PDD, 230Th/U-dating shows that the RBH stalagmites grew during the Eemian and most of the Greenland Interstadials (GIS) during MIS 5. Thus, the growth phases of the RBH stalagmites might be related to a reorganization of the Atlantic Meridional Overturning Circulation (AMOC). The stable isotope (δ13C and δ18O) and the trace element variability of the stalagmites reflects rapid changes of past temperature and precipitation on millennial and sub-millennial timescales. These past climate changes can be amplified by orbitally forced variations of the July solar insolation at 65°N. Um ein besseres Verständnis über den nachträglichen Einfluss von Diagenese auf Speleothem 230Th/U-Alter und die paläoklimatische Variabilität während des Marinen Isotopen Stadium 5 (MIS 5) in Norddeutschland zu gewinnen, wurden vier Stalagmiten aus der Riesenberghöhle (RBH). Sie wurden hinsichtlich, der 230Th/U Datierung, sowie ihrer stabilen Sauerstoff- und Kohlenstoffisotope und mit ablation inducively coupled mass ... Doctoral or Postdoctoral Thesis Greenland Gutenberg Open Science (Open-Science-Repository of the Johannes Gutenberg-University Mainz) Greenland |
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Gutenberg Open Science (Open-Science-Repository of the Johannes Gutenberg-University Mainz) |
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ftunivmainzpubl |
language |
English |
topic |
ddc:550 |
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ddc:550 Tolzmann, Jan The reconstruction of paleoclimate variability in Northern Germany, during marine isotope stage 5 |
topic_facet |
ddc:550 |
description |
In order to obtain a better understanding about the influence of post-depositional diagenesis on speleothem 230Th/U-ages and paleoclimate variability during Marine Isotope Stage (MIS) 5 in northern Germany, four stalagmites from the Riesenberghöhle (RBH) were investigated by thin section analysis, 230Th/U-dating as well as stable oxygen and carbon isotope and laser ablation inductively coupled mass spectrometry (LA-ICPMS) trace element analysis. The RBH is located in the Weser Hills and is one of the northernmost limestone caves in Germany.rnMulti collector (MC) ICPMS 230Th/U-ages and thin section analysis of the RBH stalagmites shows that some growth phases of the stalagmites were diagenetically altered after their deposition. The impact of post-depositional diagenesis (PDD) on the 230Th/U-ages is modeled, and potential processes leading to PDD are discussed. In this context, it is suggested that PDD may be induced by rapid climate change at the inception of the GIS.rnDespite of the dating uncertainties resulting from PDD, 230Th/U-dating shows that the RBH stalagmites grew during the Eemian and most of the Greenland Interstadials (GIS) during MIS 5. Thus, the growth phases of the RBH stalagmites might be related to a reorganization of the Atlantic Meridional Overturning Circulation (AMOC). The stable isotope (δ13C and δ18O) and the trace element variability of the stalagmites reflects rapid changes of past temperature and precipitation on millennial and sub-millennial timescales. These past climate changes can be amplified by orbitally forced variations of the July solar insolation at 65°N. Um ein besseres Verständnis über den nachträglichen Einfluss von Diagenese auf Speleothem 230Th/U-Alter und die paläoklimatische Variabilität während des Marinen Isotopen Stadium 5 (MIS 5) in Norddeutschland zu gewinnen, wurden vier Stalagmiten aus der Riesenberghöhle (RBH). Sie wurden hinsichtlich, der 230Th/U Datierung, sowie ihrer stabilen Sauerstoff- und Kohlenstoffisotope und mit ablation inducively coupled mass ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Tolzmann, Jan |
author_facet |
Tolzmann, Jan |
author_sort |
Tolzmann, Jan |
title |
The reconstruction of paleoclimate variability in Northern Germany, during marine isotope stage 5 |
title_short |
The reconstruction of paleoclimate variability in Northern Germany, during marine isotope stage 5 |
title_full |
The reconstruction of paleoclimate variability in Northern Germany, during marine isotope stage 5 |
title_fullStr |
The reconstruction of paleoclimate variability in Northern Germany, during marine isotope stage 5 |
title_full_unstemmed |
The reconstruction of paleoclimate variability in Northern Germany, during marine isotope stage 5 |
title_sort |
reconstruction of paleoclimate variability in northern germany, during marine isotope stage 5 |
publisher |
Johannes Gutenberg-Universität Mainz |
publishDate |
2013 |
url |
https://openscience.ub.uni-mainz.de/handle/20.500.12030/4386 https://hdl.handle.net/20.500.12030/4386 https://doi.org/10.25358/openscience-4384 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
http://doi.org/10.25358/openscience-4384 https://openscience.ub.uni-mainz.de/handle/20.500.12030/4386 |
op_rights |
in Copyright https://rightsstatements.org/vocab/InC/1.0/ openAccess |
op_doi |
https://doi.org/20.500.12030/4386 https://doi.org/10.25358/openscience-4384 |
_version_ |
1766020109676052480 |