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. (NERC Grant NE/R018219/1)
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).
dataset
https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item165954
name: Data
function: download
https://doi.org/10.5285/3a646c8a-8422-4079-a928-a159532439eb
name: Digital Object Identifier (DOI)
function: information
http://data.bgs.ac.uk/id/dataHolding/13607757
eng
geoscientificInformation
publication
2008-06-01
Strontium isotopes
Provenance
Land ice
Neodymium isotopes
Sedimentary history
revision
2011
NERC_DDC
-179.6700
-179.6800
-75.6700
-75.6800
revision
2010
ROSS SEA [id=2001391]
2018-10-01
2020-09-01
creation
2021-05-18
notApplicable
Methods, instrumentation and data quality are discussed in full in the associated readme file and the sample preparation method is described in Simões Pereira et al. (2018). Briefly, samples were disaggregated and sieved to 63 µm, then dried and leached to remove authigenic Fe-Mn oxyhydroxide coatings (Gutjahr et al., 2007). The leached sediment was homogenised and digested before passing through standard ion exchange resins to isolate the elements of interest. Sr isotopes were analysed on a Thermo Scientific Triton TIMS and Neodymium isotopes were analysed on a Nu Plasma HR or a Nu Plasma II in static mode, both in the MAGIC laboratories at Imperial College London.
publication
2011
false
See the referenced specification
publication
2010-12-08
false
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
csv file
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Department of Earth Science & Engineer
Imperial College London
London
SW7 2BP
principalInvestigator
Research Postgraduate
Imperial College London
Royal School of Mines, Prince Consort Road
London
SW7 2BP
originator
British Geological Survey
distributor
British Geological Survey
pointOfContact
British Geological Survey
Environmental Science Centre,Keyworth
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pointOfContact
2023-01-23