Cosmogenic Be-10 and Al-26 data and calculated surface exposure ages for cobbles collected from a moraine adjacent to Mount Murphy, West Antarctica
This dataset consists of measurements of cosmogenic Be-10 and Al-26 in quartz for a set of cobbles collected from a moraine proximal to Mount Murphy, a nunatak located between Pope and Thwaites glaciers, West Antarctica. The cobbles were collected during the 2015-2016 Antarctic field season. The dataset includes cosmogenic nuclide (Be-10 and Al-26) surface exposure ages and all field (location, elevation, shielding, thickness) and analytical laboratory (quartz, beryllium and aluminium carrier masses, Be-10/Be-9 and Al-26/Al-27 ratios) data for field samples and procedural blanks required to calculate the ages.
Funding source: Natural Environment Research Council (NERC: Grants NE/S006710/1 (JSJ), NE/K012088/1 (JSJ), NE/S006753/1 (DHR), NE/K011278/1 (DHR)). Australian Nuclear Science and Technology Organisation (ANSTO) Centre for Accelerator Science award AP12872 (DHR) through the National Collaborative Research Infrastructure Strategy (NCRIS).
Simple
- Alternate title
- Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01840
- Date (Publication)
- 2024-04-30
- Identifier
- http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01840
- Maintenance and update frequency
- unknown Unknown
- Keywords
-
- NDGO0001
- NERC OAI Harvesting
-
- NERC_DDC
- GCMD Parameter Valids
-
- EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Thickness/Ice Sheet Thickness
- EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glaciers
- EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Ice Sheets
- EARTH SCIENCE > Paleoclimate > Land Records > Isotopes
- EARTH SCIENCE > Solid Earth > Geochemistry > Isotopes
- BAS Free-text keywords
-
- Antarctica
- Glacial geology
- Holocene
- Pope Glacier
- Surface exposure ages
- Thwaites Glacier
- West Antarctic Ice Sheet
- Use limitation
- This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v.3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v.3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
- Metadata language
- EnglishEnglish
- Topic category
-
- Climatology, meteorology, atmosphere
- Geoscientific information
![thumbnail](https://data-search.nerc.ac.uk/geonetwork/srv/api/regions/geom.png?geomsrs=EPSG:4326&geom=POLYGON((-111.0137%20-75.22002,-111.0137%20-75.21829,-111.0247%20-75.21829,-111.0247%20-75.22002,-111.0137%20-75.22002)))
- Begin date
- 2022-10-19
- End date
- unknown
- Reference system identifier
- OGP / urn:ogc:def:crs:EPSG::4326
- Distribution format
-
- Hierarchy level
- dataset Dataset
Domain consistency
- Measure identification
- INSPIRE / Conformity_001
Conformance result
- Date
- Explanation
- See the referenced specification
- Pass
- No
- Statement
- Quartz purity was tested using inductively coupled plasma optical emission spectrometry (ICP-OES). For isotope dilution chemistry, one procedural blank (beryllium and aluminium carrier processed with no quartz) was processed with each batch of 11 samples. Because the five samples in this dataset were processed across two batches of samples (along with other Antarctic surface samples), there are two procedural blanks in this dataset that are used to correct Be-10 and Al-26 concentrations. Be-10 concentrations were corrected using the mean and standard deviation (SD) of two blanks (Be-9/Be-10 ratios: mean 2.71 x 10-15, SD 3.61 x 10-16, or Be-10 atoms: mean 47410 ± SD 6255). Al-26 concentrations were corrected using the weighted average and standard error of the measured ratios of two blanks as well as two carrier blanks (Al-26/Al-27 ratios: weighted average 7.79 x 10-16, SE 1.54 x 10-16). This weighted average Al-26/Al-27 ratio is used with the mass of carrier used with each quartz sample to calculate the background correction (in number of Al-26 atoms) for each Al-26 concentration. In other words, the blank correction for the Al-26 concentrations scales with the amount of aluminium carrier used. These values range from 34,573 to 43,757 Al-26 atoms and are found in ''26Al blank (atoms/sample)'' and ''26Al blank (atoms/sample) ±'' columns of Al_analytical_data_and_ages.csv. Carrier blanks are ~2.5 mg of aluminium carrier precipitated with the two process blanks above, but with no prior steps (quartz dissolution, isotope dilution chemistry). We also processed one aliquot of the laboratory intercomparison material CRONUS A (sample ID STDA050922 in the data tables).
- File identifier
- GB_NERC_BAS_PDC_01840 XML
- Metadata language
- EnglishEnglish
- Hierarchy level
- dataset Dataset
- Date stamp
- 2024-04-30
- Metadata standard name
- NERC profile of ISO19115:2003
- Metadata standard version
- 1.0
Overviews
Spatial extent
![thumbnail](https://data-search.nerc.ac.uk/geonetwork/srv/api/regions/geom.png?geomsrs=EPSG:4326&geom=POLYGON((-111.0137%20-75.22002,-111.0137%20-75.21829,-111.0247%20-75.21829,-111.0247%20-75.22002,-111.0137%20-75.22002)))
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