Mineral magnetic characterization of the Upper Pleniglacial Nussloch loess sequence (Germany): an insight into local environmental processes
Presently, most loess/palaeosol magnetic susceptibility records are interpreted as following either the wind-vigour model or the pedogenic enhancement model. However redoxomorphic processes induced by waterlogging, often referred to gleying in the loess literature, are also known to alter loess depo...
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fthighwire:oai:open-archive.highwire.org:gji:199/3/1463 2023-05-15T18:40:38+02:00 Mineral magnetic characterization of the Upper Pleniglacial Nussloch loess sequence (Germany): an insight into local environmental processes Taylor, Samuel N. Lagroix, France Rousseau, Denis-Didier Antoine, Pierre 2014-10-10 07:36:40.0 text/html http://gji.oxfordjournals.org/cgi/content/short/199/3/1463 https://doi.org/10.1093/gji/ggu331 en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/199/3/1463 http://dx.doi.org/10.1093/gji/ggu331 Copyright (C) 2014, Oxford University Press Geomagnetism rock magnetism and palaeomagnetism TEXT 2014 fthighwire https://doi.org/10.1093/gji/ggu331 2016-11-16T17:01:13Z Presently, most loess/palaeosol magnetic susceptibility records are interpreted as following either the wind-vigour model or the pedogenic enhancement model. However redoxomorphic processes induced by waterlogging, often referred to gleying in the loess literature, are also known to alter loess deposits but their impact on loess/palaeosol magnetic susceptibility records has received little attention. The reported rock magnetic study aims to characterize the mineral magnetic response of loess to waterlogging-induced redoxomorphic processes, thus improving our understanding of mineral magnetic changes within loess deposits with respect to environmental and climate conditions. The Nussloch loess-palaeosol deposit (Rhine Valley, Germany) was targeted because it is one of the best-studied Pleniglacial deposits for Western Europe in which numerous tundra gley intervals have been identified. Moreover, a comprehensive high-resolution environmental magnetism study has never been undertaken for this site. Various rock magnetism experiments were conducted at both room and low temperatures to characterise the composition, concentration and relative magnetic grain size of the mineral magnetic assemblage. The relative changes in magnetic parameters within the investigated loess interval are primarily controlled by (1) varying concentrations of coarse-grained ferrimagnetic particles of detrital (aeolian) origin and (2) dissolution of fine-grained ferrimagnetic particles related to in situ post-depositional alteration promoted by waterlogging-induced redoxomorphic processes. Goethite is found to be ubiquitous throughout the studied interval and is argued to have both a primary (aeolian) and secondary ( in situ ) origin. We conclude, that redoxomorphic processes induced by waterlogging, if present, will hinder the interpretation of magnetic susceptibility variations within loess and palaeosol deposits following the expected relationships dictated by the wind-vigour and the pedogenic enhancement magnetism models. Text Tundra HighWire Press (Stanford University) Geophysical Journal International 199 3 1463 1480 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Geomagnetism rock magnetism and palaeomagnetism |
spellingShingle |
Geomagnetism rock magnetism and palaeomagnetism Taylor, Samuel N. Lagroix, France Rousseau, Denis-Didier Antoine, Pierre Mineral magnetic characterization of the Upper Pleniglacial Nussloch loess sequence (Germany): an insight into local environmental processes |
topic_facet |
Geomagnetism rock magnetism and palaeomagnetism |
description |
Presently, most loess/palaeosol magnetic susceptibility records are interpreted as following either the wind-vigour model or the pedogenic enhancement model. However redoxomorphic processes induced by waterlogging, often referred to gleying in the loess literature, are also known to alter loess deposits but their impact on loess/palaeosol magnetic susceptibility records has received little attention. The reported rock magnetic study aims to characterize the mineral magnetic response of loess to waterlogging-induced redoxomorphic processes, thus improving our understanding of mineral magnetic changes within loess deposits with respect to environmental and climate conditions. The Nussloch loess-palaeosol deposit (Rhine Valley, Germany) was targeted because it is one of the best-studied Pleniglacial deposits for Western Europe in which numerous tundra gley intervals have been identified. Moreover, a comprehensive high-resolution environmental magnetism study has never been undertaken for this site. Various rock magnetism experiments were conducted at both room and low temperatures to characterise the composition, concentration and relative magnetic grain size of the mineral magnetic assemblage. The relative changes in magnetic parameters within the investigated loess interval are primarily controlled by (1) varying concentrations of coarse-grained ferrimagnetic particles of detrital (aeolian) origin and (2) dissolution of fine-grained ferrimagnetic particles related to in situ post-depositional alteration promoted by waterlogging-induced redoxomorphic processes. Goethite is found to be ubiquitous throughout the studied interval and is argued to have both a primary (aeolian) and secondary ( in situ ) origin. We conclude, that redoxomorphic processes induced by waterlogging, if present, will hinder the interpretation of magnetic susceptibility variations within loess and palaeosol deposits following the expected relationships dictated by the wind-vigour and the pedogenic enhancement magnetism models. |
format |
Text |
author |
Taylor, Samuel N. Lagroix, France Rousseau, Denis-Didier Antoine, Pierre |
author_facet |
Taylor, Samuel N. Lagroix, France Rousseau, Denis-Didier Antoine, Pierre |
author_sort |
Taylor, Samuel N. |
title |
Mineral magnetic characterization of the Upper Pleniglacial Nussloch loess sequence (Germany): an insight into local environmental processes |
title_short |
Mineral magnetic characterization of the Upper Pleniglacial Nussloch loess sequence (Germany): an insight into local environmental processes |
title_full |
Mineral magnetic characterization of the Upper Pleniglacial Nussloch loess sequence (Germany): an insight into local environmental processes |
title_fullStr |
Mineral magnetic characterization of the Upper Pleniglacial Nussloch loess sequence (Germany): an insight into local environmental processes |
title_full_unstemmed |
Mineral magnetic characterization of the Upper Pleniglacial Nussloch loess sequence (Germany): an insight into local environmental processes |
title_sort |
mineral magnetic characterization of the upper pleniglacial nussloch loess sequence (germany): an insight into local environmental processes |
publisher |
Oxford University Press |
publishDate |
2014 |
url |
http://gji.oxfordjournals.org/cgi/content/short/199/3/1463 https://doi.org/10.1093/gji/ggu331 |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/199/3/1463 http://dx.doi.org/10.1093/gji/ggu331 |
op_rights |
Copyright (C) 2014, Oxford University Press |
op_doi |
https://doi.org/10.1093/gji/ggu331 |
container_title |
Geophysical Journal International |
container_volume |
199 |
container_issue |
3 |
container_start_page |
1463 |
op_container_end_page |
1480 |
_version_ |
1766230022525288448 |