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Metadata Files

Data Publication

Neodymium and Strontium isotope compositions of Miocene to recent sediments collected at Site U1521 during International Ocean Discovery Programme (IODP) Expedition 374 to the Ross Sea, Antarctica

Marschalek, James

NERC EDS National Geoscience Data Centre

(2021)

Descriptions

This dataset comprises neodymium (Nd) and strontium (Sr) isotope compositions measured on 72 sediment samples, from IODP Expedition 374 Site U1521 to the Ross Sea. These were collected on the RV JOIDES Resolution. Shipboard biostratigraphy and magnetostratigraphy suggests the samples are mainly early Miocene in age (McKay et al., 2019). The uppermost samples do, however, include younger Plio-Pleistocene sediments. Neodymium and Sr isotope analyses were conducted using a multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS) and a thermal ionisation mass spectrometer (TIMS), respectively, in the MAGIC laboratories at Imperial College London. Neodymium and Sr isotopes in sediments can be compared to measurements from terrestrial rock samples, allowing the changing provenance of the sediments to be traced. This dataset therefore provides information on how erosion by Antarctica’s ice sheets bordering the Ross Sea has changed over time. Neodymium isotopes are reported in the epsilon notation, which denotes the deviation in parts per 10,000 from the present-day composition of the Chondritic Uniform Reservoir (143Nd/144Nd = 0.512638) (Jacobsen and Wasserburg, 1980).

Keywords

Originally assigned keywords

sediment provenance

Neodymium isotopes

Strontium isotopes

Antarctic Ice Sheets

Early Miocene

MSL enriched keywords

Phanerozoic

Cenozoic

Neogene

Miocene

measured property

neodymium

strontium

minerals

oxide mineral

ice

Quaternary

Pleistocene

Inferred behavior

natural remanent magnetisation processing

magnetostratigraphy

equipment

mass spectrometer

inductively coupled plasma-mass spectrometer

multicollector-inductively coupled plasma-mass spectrometer

thermal ionization-mass spectrometer

MSL enriched sub domains i

geochemistry

paleomagnetism

Source

https://www2.bgs.ac.uk/nationalgeosciencedatacentre/citedData/catalogue/3a646c8a-8422-4079-a928-a159532439eb.html

Source publisher

NERC EDS National Geoscience Data Centre

DOI

10.5285/3a646c8a-8422-4079-a928-a159532439eb

Creators

Marschalek, James

Citation

Marschalek, J. (2021). Neodymium and Strontium isotope compositions of Miocene to recent sediments collected at Site U1521 during International Ocean Discovery Programme (IODP) Expedition 374 to the Ross Sea, Antarctica [Data set]. NERC EDS National Geoscience Data Centre. https://doi.org/10.5285/3A646C8A-8422-4079-A928-A159532439EB

Dates

Submitted:

2021-04-27

Funding References

Funder name: Natural Environment Research Council

Funder identifier: https://doi.org/10.13039/501100000270

Funder identifier type: Crossref Funder ID

Award number: NE/R018219/1

Award title: Ocean-ice Interaction in the Ross Sea during Past Warm Periods