Date (Creation)

2025-03-04

Date (Revision)

2025-03-04

Date (Publication)

2025-03-04

Date (released)

2025-03-04

Edition

1.0

Unique resource identifier

https://doi.org/10.5285/de4a62bc-9c01-4aa3-9fd8-c64d706cfc13

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/02025

Codespace

https://data.bas.ac.uk/

Unique resource identifier

NE/S006710/1

Codespace

award

Unique resource identifier

NE/S006753/1

Codespace

award

Unique resource identifier

NE/S00663X/1

Codespace

award

Other citation details

Please cite this item as: Nichols, K., Rood, D., Johnson, J., Wilcken, K., & Brown, K. (2025). Cosmogenic 10Be data and calculated surface exposure ages for 41 cobbles and boulders collected from nunataks adjacent to Larter and Lucchitta glaciers in the Hudson Mountains, West Antarctica (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/de4a62bc-9c01-4aa3-9fd8-c64d706cfc13

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Imperial College London	Nichols, Keir		Author
Imperial College London	Rood, Dylan		Author
British Antarctic Survey	Johnson, Joanne		Author
Australian Nuclear Science and Technology Organisation	Wilcken, Klaus		Author
University College London	Brown, Katie		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency

As needed

Maintenance note

Completed

Global Change Master Directory (GCMD) Science Keywords

• EARTH SCIENCE > Land Surface > Geomorphology > Glacial Landforms/Processes

Theme

• Antarctica

• Cosmogenic nuclides

• Glacial geology

• Holocene

• ITGC

• Larter Glacier

• Lucchitta Glacier

• Pine Island Glacier

• Surface exposure ages

Place

• Webber Nunatak Antarctica

• Mount Moses Antarctica

• Slusher Nunatak Antarctica

• Dean Nunatak Antarctica

• Wold Nunatak Antarctica

• Siren Rock Antarctica

• Larter Glacier Antarctica

• Lucchitta Glacier Antarctica

• Pine Island Glacier Antarctica

• West Antarctica Antarctica

• Amundsen Sea Embayment Antarctica

GEMET - INSPIRE themes, version 1.0

• Land cover

Access constraints

Other restrictions

Other constraints

no limitations to public access

Access constraints

Other restrictions

Other constraints

no limitations

Use constraints

License

Other constraints

Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/

Use constraints

Other restrictions

Other constraints

and supplied under Open Government Licence v.3 ().

Use constraints

Other restrictions

Other constraints

No restrictions apply.

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Unique resource identifier

url

Codespace

url

Association Type

Larger work citation

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Geoscientific information

Begin date

2019-11-25

End date

2019-12-31

Supplemental Information

It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title

European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication)

2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier

urn:ogc:def:crs:EPSG::3031

Version

6.18.3

Hierarchy level

Dataset

Statement

Methodology:

Samples from erratic cobbles and boulders perched on presently exposed mountain peaks next to Larter and Lucchitta glaciers were collected by Dr Joanne S Johnson (British Antarctic Survey) during the 2019-20 austral summer. Latitude, altitude, and elevation measurements of the location of the samples were made using a Javad Triumph II GPS receiver. The sample heights above ellipsoid were corrected to orthometric heights (height above geoid EGM08 in metres above sea level) using Precise Point Positioning software. Laboratory chemistry was conducted in the CosmIC Laboratory at Imperial College London, UK. Quartz purification followed the methods of Kohl and Nishiizumi (1992). Isotope dilution chemistry and beryllium purification used the methods of Corbett et al. (2016). 10Be/9Be ratios were measured by accelerator mass spectrometry at ANSTO using the methods of Wilcken et al. (2017; 2022) and normalised to the standard values of Nishiizumi et al. (2007). Laboratory data were then converted to 10Be concentrations and, finally, exposure ages, using an online exposure age calculator (Balco et al., 2008). Exposure ages were calculated using the default global production rate calibration dataset and two different cosmogenic nuclide scaling methods known as St (Stone, 2000) and LSDn (Lifton et al., 2014).

Data quality:

Quartz purity was tested using inductively coupled plasma optical emission spectrometry (ICP-OES). For isotope dilution chemistry, one procedural blank (carrier-only) was processed for every 11 samples, and each batch of samples is assigned a batch number. The procedural blank used to correct the 10Be concentration of each sample is dependent on the time period during which it was processed in the CosmIC Laboratory (processed_blank_data.csv). Beryllium was extracted from samples in batch one at the same time as the samples presented in Balco et al. (2023), Nichols et al. (2023), and Marschalek et al. (2024). Therefore, the blank value used to correct the 10Be concentrations in batch one is the same as that used to correct 10Be concentrations in the aforementioned studies (the mean and standard deviation of 12 batches of samples, 10Be/9Be = 1.73 x 10-15 ± 4.82 x 10-16; 30287 ± 8456 10Be atoms; processed_blank_data.csv). Samples in batch two were processed in the year following those in batch one. Therefore, samples in batch two are corrected with a different blank value (the mean and standard deviation of two process blanks, BLK300822 and BLK050922, 10Be/9Be = 2.71 x10-15 ± 3.61 x 10-16, 47410 ± 6255 10Be atoms; processed_blank_data.csv). Samples in batches three, four, and five were processed later in the same year as those in batch two. A batch-specific blank value is therefore used to correct the 10Be concentrations of samples in batches three (BLK120922, 10Be/9Be = 2.13 x10-15 ± 3.41 x 10-16, 37088 ± 5939 10Be atoms), four (BLK260922, 10Be/9Be = 1.86 x10-15 ± 3.88 x 10-16, 32550 ± 6786 10Be atoms), and five (BLK041022, 10Be/9Be = 4.50 x 10-15 ± 5.31 x 10-16, 78589 ± 9262 10Be atoms; processed_blank_data.csv). In all cases, uncertainties in the sample and blank values are propagated in quadrature.

Metadata

File identifier

de4a62bc-9c01-4aa3-9fd8-c64d706cfc13 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2025-03-04

Metadata standard name

ISO 19115 Geographic Information - Metadata

Metadata standard version

ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact