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Metadata Files

Data Publication

Magnetochronostratigraphic data from sediments in the Drake Passage – cores from expedition PS97, German RV Polarstern, 2016

Nowaczyk, Norbert R. | Liu, Jiabo | Arz, Helge W.

GFZ Data Services

(2024)

Descriptions

Sediment cores were recovered during the ship expedition of German RV Polarstern in 2016 (PS97) using piston corers. For paleo- and rock magnetic analyses clear plastic boxes of 20×20×15 mm were pressed into the split halves of the generally 1 m long sections of the sediment cores. In order to determine the direction of the characteristic remanent magnetization (ChRM), demagnetization results of the NRM were subjected to principal component analysis (PCA) according to Kirschvink (1980). The PCA also provided the maximum angular deviation (MAD) as a measure of the precision of the determined ChRM direction. ChRM declinations obtained by PCA were rotated around a vertical axis until the declinations of all samples falling into a circular window of 35° around the direction expected from a geocentric axial dipole (-72.9°) yielded a mean of 0°. ChRM data from core PS97-085-1 (-85-3) were tentatively tilted by +17° (-7°) around the EW axis in order to parallel the maximum in the inclination distribution with the inclination of a geocentric axial dipole field. The anhysteretic susceptibility K(ARM) is defined as the ARM intensity normalised by the static field used for producing the ARM. The anhysteretic susceptibility normalised by the low field bulk susceptibility K(ARM)/klf then is a magnetic grain size proxy with low (high) ratios indicating relatively large (small) magnetite particles. In order to discriminate samples being dominated by low-coercive minerals (magnetite, Fe3O4 and greigite, Fe3S4) from samples being dominated by high-coercive minerals (mostly hematite, Fe2O3), the S-ratio was calculated using S=0.5×(1-[IRM(-200 mT)/SIRM(1500 mT)]). S-ratios range from 0 to 1, with: dominance of magnetite/greigite: 0<

Keywords


Originally assigned keywords
sediment magnetization
Drake Passage
Palaeomagnetism
Magnetic properties
Palaeointensity
EPOS
multi-scale laboratories
paleomagnetic and magnetic data
paleomagnetic data
magnetic susceptibility
Core
EARTH SCIENCE &gt; SOLID EARTH &gt; GEOMAGNETISM &gt; MAGNETIC FIELD &gt; MAGNETIC DECLINATION
EARTH SCIENCE &gt; SOLID EARTH &gt; GEOMAGNETISM &gt; MAGNETIC FIELD &gt; MAGNETIC INCLINATION
EARTH SCIENCE &gt; SOLID EARTH &gt; GEOMAGNETISM &gt; MAGNETIC FIELD &gt; MAGNETIC INTENSITY
EARTH SCIENCE &gt; SOLID EARTH &gt; GEOMAGNETISM &gt; PALEOMAGNETISM
remanent magnetisation &gt; demagnetisation type AF
Sedimentary

Corresponding MSL vocabulary keywords
magnetic susceptibility

MSL enriched keywords
Measured property
magnetic susceptibility
minerals
sulfide minerals
greigite
oxide mineral
hematite
magnetite
Apparatus
laboratory induced remanent magnetisation measurement
isothermal remanent magnetiser (IRM)
demagnetisation
remanent magnetisation
isothermal remanent magnetisation (IRM)
natural remanent magnetisation (NRM)
Inferred behavior
anisotropy of magnetic susceptibility and remanence
natural remanent magnetisation (NRM) orientation
Analyzed feature
grain size and configuration
grain size

MSL enriched sub domains i

paleomagnetism
microscopy and tomography

Source

https://dataservices.gfz-potsdam.de/panmetaworks/showshort.php?id=eff2386b-2e37-11ef-967a-4ffbfe06208e

Source publisher

GFZ Data Services


DOI

10.5880/gfz.4.3.2024.001


Creators

Nowaczyk, Norbert R.

GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0002-3362-0578

Liu, Jiabo

GFZ German Research Centre for Geosciences, Potsdam, Germany | Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, Hubei, China

ORCID:

https://orcid.org/0000-0002-6150-1322

Arz, Helge W.

Leibnitz Institute for Baltic Sea Research Warnemünde, Rostock, Germany

ORCID:

https://orcid.org/0000-0002-1997-1718


Contributors

Laboratory For Earth Magnetism In Time And Space (GFZ German Research Centre For Geosciences, Germany)

HostingInstitution

GFZ German Research Centre for Geosciences, Potsdam, Germany

Nowaczyk, Norbert R.

ContactPerson

GFZ German Research Centre for Geosciences, Potsdam, Germany


References

10.1111/j.1365-246x.1980.tb02601.x

10.1029/2019jb019225

10.1038/s41467-021-24264-9


Citation

Nowaczyk, N. R., Liu, J., & Arz, H. W. (2024). Magnetochronostratigraphic data from sediments in the Drake Passage – cores from expedition PS97, German RV Polarstern, 2016 [Data set]. GFZ Data Services. https://doi.org/10.5880/GFZ.4.3.2024.001


Dates

Issued:

2024


Rights

Creative Commons Attribution 4.0 International


Geo location(s)

Station-No.: PS97-085-3

Station-No.: PS97-085-1