Data Publication

Paleomagnetic, rock-magnetic and paleointensity data from three early Paleozoic geological units: plutons of the Araçuaí orogen, Brazil; Gabbros of Aberdeenshire, Scotland; and a Silurian volcanic succession of the southern Britain

Lloyd, Simon | Hopkins, Rebecca | Brabin, Joseph

NERC EDS National Geoscience Data Centre

(2026)

Descriptions

The dataset contains results from three early Paleozoic geological units: the approximately 500 Ma Santa Angélica and Venda Nova plutons of the Araçuaí orogen, Brazil; the approximately 470 Ma Younger Gabbros of Aberdeenshire, Scotland; and the approximately 430 Ma Silurian volcanic succession of the East Mendips Inlier, southern Britain. The deposited files include specimen- and site-level paleointensity results, paleomagnetic directional data, rock-magnetic measurements, methodological and selection-criteria information, and the processed data used to construct the long-term virtual dipole moment and geomagnetic polarity-reversal-frequency synthesis. Upload-ready files for analysis using Paleomagnetism.org and Paleointensity.org are also included, together with file-level metadata. These data provide new estimates of geomagnetic field strength from approximately 500-430 Ma and help fill a major gap in the Phanerozoic paleointensity record. They were used to investigate the relationship between long-term geomagnetic dipole moment and polarity reversal frequency. Data support the paper "Geomagnetic dipole moment and polarity reversal frequency covary on a ~200-million-year timescale". The paper identifies the three datasets and their respective ages and locations, and states that the deposit contains upload-ready analytical files, metadata and the data used to construct the long-term synthesis.

Keywords

MSL enriched keywords
Phanerozoic
Paleozoic
Cambrian
Ordovician
Silurian
Measured property
remanent magnetisation
thermoremanent magnetisation (TRM)
igneous rock - intrusive
basic intrusive
gabbro
tectonic plate boundary
convergent tectonic plate boundary
continental collision
orogen
paleointensity
Inferred behavior
natural remanent magnetisation processing
relative paleointensity
MSL vocabulary keywords corresponding to originally assigned keywords
Phanerozoic
Cambrian
Ordovician
Silurian
thermoremanent magnetisation (TRM)
Originally assigned keywords
Palaeointensity
palaeomagnetism
geomagnetism
geomagnetic dipole moment
geomagnetic polarity reversals
reversal frequency
geodynamo
Phanerozoic
Palaeozoic
Cambrian
Ordovician
Silurian
rock magnetism
core-mantle interaction
thermoremanent magnetisation
virtual dipole moment

Metadata


MSL enriched sub domains

paleomagnetism

Source


Source publisher

NERC EDS National Geoscience Data Centre

DOI


Creators

Lloyd, Simon
Personal
University of Liverpool
Hopkins, Rebecca
Personal
University of Liverpool
Brabin, Joseph
Personal
University of Liverpool

Citation

Lloyd, S., Hopkins, R., & Brabin, J. (2026). Paleomagnetic, rock-magnetic and paleointensity data from three early Paleozoic geological units: plutons of the Araçuaí orogen, Brazil; Gabbros of Aberdeenshire, Scotland; and a Silurian volcanic succession of the southern Britain [Dataset]. NERC EDS National Geoscience Data Centre. https://doi.org/10.5285/25EC9DA7-0DA9-4E4C-8AAB-F8C4646936E4


Dates

Available 2026-07-17

Language

- no language entry found -


Funding References

Funder Name Natural Environment Research Council
Funder Identifier https://doi.org/10.13039/501100000270
Award Number NE/X014142/1
Award Title Palaeomagnetic field behaviour in the Palaeozoic and the hunt for inner core birth

Locations


Geo location(s)

Brazil

Aberdeenshire, Scotland

southern Britain