Sedimentologic and magnetic data of sediment cores on the western slope of the Mid-Atlantic Ridge, supplement to: Franke, Christine; Hofmann, Daniela; von Dobeneck, Tilo (2004): Does lithology influence relative paleointensity records? A statistical analysis on South Atlantic pelagic sediments. Physics of the Earth and Planetary Interior, 147, 285-296
The relative paleointensity (RPI) method assumes that the intensity of post depositional remanent magnetization (PDRM) depends exclusively on the magnetic field strength and the concentration of the magnetic carriers. Sedimentary remanence is regarded as an equilibrium state between aligning geomagn...
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ftdatacite:10.1594/pangaea.779170 2023-05-15T18:21:19+02:00 Sedimentologic and magnetic data of sediment cores on the western slope of the Mid-Atlantic Ridge, supplement to: Franke, Christine; Hofmann, Daniela; von Dobeneck, Tilo (2004): Does lithology influence relative paleointensity records? A statistical analysis on South Atlantic pelagic sediments. Physics of the Earth and Planetary Interior, 147, 285-296 Franke, Christine Hofmann, Daniela von Dobeneck, Tilo 2012 application/zip https://dx.doi.org/10.1594/pangaea.779170 https://doi.pangaea.de/10.1594/PANGAEA.779170 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.pepi.2004.07.004 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Gravity corer Kiel type M46/4 Meteor 1986 Center for Marine Environmental Sciences MARUM Supplementary Collection of Datasets Collection article 2012 ftdatacite https://doi.org/10.1594/pangaea.779170 https://doi.org/10.1016/j.pepi.2004.07.004 2022-02-08T16:24:46Z The relative paleointensity (RPI) method assumes that the intensity of post depositional remanent magnetization (PDRM) depends exclusively on the magnetic field strength and the concentration of the magnetic carriers. Sedimentary remanence is regarded as an equilibrium state between aligning geomagnetic and randomizing interparticle forces. Just how strong these mechanical and electrostatic forces are, depends on many petrophysical factors related to mineralogy, particle size and shape of the matrix constituents. We therefore test the hypothesis that variations in sediment lithology modulate RPI records. For 90 selected Late Quaternary sediment samples from the subtropical and subantarctic South Atlantic Ocean a combined paleomagnetic and sedimentological dataset was established. Misleading alterations of the magnetic mineral fraction were detected by a routine Fe/kappa test (Funk, J., von Dobeneck, T., Reitz, A., 2004. Integrated rock magnetic and geochemical quantification of redoxomorphic iron mineral diagenesis in Late Quaternary sediments from the Equatorial Atlantic. In: Wefer, G., Mulitza, S., Ratmeyer, V. (Eds.), The South Atlantic in the Late Quaternary: reconstruction of material budgets and current systems. Springer-Verlag, Berlin/Heidelberg/New York/Tokyo, pp. 239-262). Samples with any indication of suboxic magnetite dissolution were excluded from the dataset. The parameters under study include carbonate, opal and terrigenous content, grain size distribution and clay mineral composition. Their bi- and multivariate correlations with the RPI signal were statistically investigated using standard techniques and criteria. While several of the parameters did not yield significant results, clay grain size and chlorite correlate weakly and opal, illite and kaolinite correlate moderately to the NRM/ARM signal used here as a RPI measure. The most influential single sedimentological factor is the kaolinite/illite ratio with a Pearson's coefficient of 0.51 and 99.9% significance. A three-member regression model suggests that matrix effects can make up over 50% of the observed RPI dynamics. Article in Journal/Newspaper South Atlantic Ocean DataCite Metadata Store (German National Library of Science and Technology) Hofmann ENVELOPE(160.600,160.600,-82.667,-82.667) Mid-Atlantic Ridge |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Gravity corer Kiel type M46/4 Meteor 1986 Center for Marine Environmental Sciences MARUM |
spellingShingle |
Gravity corer Kiel type M46/4 Meteor 1986 Center for Marine Environmental Sciences MARUM Franke, Christine Hofmann, Daniela von Dobeneck, Tilo Sedimentologic and magnetic data of sediment cores on the western slope of the Mid-Atlantic Ridge, supplement to: Franke, Christine; Hofmann, Daniela; von Dobeneck, Tilo (2004): Does lithology influence relative paleointensity records? A statistical analysis on South Atlantic pelagic sediments. Physics of the Earth and Planetary Interior, 147, 285-296 |
topic_facet |
Gravity corer Kiel type M46/4 Meteor 1986 Center for Marine Environmental Sciences MARUM |
description |
The relative paleointensity (RPI) method assumes that the intensity of post depositional remanent magnetization (PDRM) depends exclusively on the magnetic field strength and the concentration of the magnetic carriers. Sedimentary remanence is regarded as an equilibrium state between aligning geomagnetic and randomizing interparticle forces. Just how strong these mechanical and electrostatic forces are, depends on many petrophysical factors related to mineralogy, particle size and shape of the matrix constituents. We therefore test the hypothesis that variations in sediment lithology modulate RPI records. For 90 selected Late Quaternary sediment samples from the subtropical and subantarctic South Atlantic Ocean a combined paleomagnetic and sedimentological dataset was established. Misleading alterations of the magnetic mineral fraction were detected by a routine Fe/kappa test (Funk, J., von Dobeneck, T., Reitz, A., 2004. Integrated rock magnetic and geochemical quantification of redoxomorphic iron mineral diagenesis in Late Quaternary sediments from the Equatorial Atlantic. In: Wefer, G., Mulitza, S., Ratmeyer, V. (Eds.), The South Atlantic in the Late Quaternary: reconstruction of material budgets and current systems. Springer-Verlag, Berlin/Heidelberg/New York/Tokyo, pp. 239-262). Samples with any indication of suboxic magnetite dissolution were excluded from the dataset. The parameters under study include carbonate, opal and terrigenous content, grain size distribution and clay mineral composition. Their bi- and multivariate correlations with the RPI signal were statistically investigated using standard techniques and criteria. While several of the parameters did not yield significant results, clay grain size and chlorite correlate weakly and opal, illite and kaolinite correlate moderately to the NRM/ARM signal used here as a RPI measure. The most influential single sedimentological factor is the kaolinite/illite ratio with a Pearson's coefficient of 0.51 and 99.9% significance. A three-member regression model suggests that matrix effects can make up over 50% of the observed RPI dynamics. |
format |
Article in Journal/Newspaper |
author |
Franke, Christine Hofmann, Daniela von Dobeneck, Tilo |
author_facet |
Franke, Christine Hofmann, Daniela von Dobeneck, Tilo |
author_sort |
Franke, Christine |
title |
Sedimentologic and magnetic data of sediment cores on the western slope of the Mid-Atlantic Ridge, supplement to: Franke, Christine; Hofmann, Daniela; von Dobeneck, Tilo (2004): Does lithology influence relative paleointensity records? A statistical analysis on South Atlantic pelagic sediments. Physics of the Earth and Planetary Interior, 147, 285-296 |
title_short |
Sedimentologic and magnetic data of sediment cores on the western slope of the Mid-Atlantic Ridge, supplement to: Franke, Christine; Hofmann, Daniela; von Dobeneck, Tilo (2004): Does lithology influence relative paleointensity records? A statistical analysis on South Atlantic pelagic sediments. Physics of the Earth and Planetary Interior, 147, 285-296 |
title_full |
Sedimentologic and magnetic data of sediment cores on the western slope of the Mid-Atlantic Ridge, supplement to: Franke, Christine; Hofmann, Daniela; von Dobeneck, Tilo (2004): Does lithology influence relative paleointensity records? A statistical analysis on South Atlantic pelagic sediments. Physics of the Earth and Planetary Interior, 147, 285-296 |
title_fullStr |
Sedimentologic and magnetic data of sediment cores on the western slope of the Mid-Atlantic Ridge, supplement to: Franke, Christine; Hofmann, Daniela; von Dobeneck, Tilo (2004): Does lithology influence relative paleointensity records? A statistical analysis on South Atlantic pelagic sediments. Physics of the Earth and Planetary Interior, 147, 285-296 |
title_full_unstemmed |
Sedimentologic and magnetic data of sediment cores on the western slope of the Mid-Atlantic Ridge, supplement to: Franke, Christine; Hofmann, Daniela; von Dobeneck, Tilo (2004): Does lithology influence relative paleointensity records? A statistical analysis on South Atlantic pelagic sediments. Physics of the Earth and Planetary Interior, 147, 285-296 |
title_sort |
sedimentologic and magnetic data of sediment cores on the western slope of the mid-atlantic ridge, supplement to: franke, christine; hofmann, daniela; von dobeneck, tilo (2004): does lithology influence relative paleointensity records? a statistical analysis on south atlantic pelagic sediments. physics of the earth and planetary interior, 147, 285-296 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2012 |
url |
https://dx.doi.org/10.1594/pangaea.779170 https://doi.pangaea.de/10.1594/PANGAEA.779170 |
long_lat |
ENVELOPE(160.600,160.600,-82.667,-82.667) |
geographic |
Hofmann Mid-Atlantic Ridge |
geographic_facet |
Hofmann Mid-Atlantic Ridge |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
https://dx.doi.org/10.1016/j.pepi.2004.07.004 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.779170 https://doi.org/10.1016/j.pepi.2004.07.004 |
_version_ |
1766200529842601984 |