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Metadata Files

Data Publication

Geochemical data (XRF-scanner) for core LC7 sediment record from Blaso, a large, epishelf lake in NW Greenland collected July-August 2017

Smith, James A. | Callard, Louise | Sánchez Montes, Maria Luisa | McClymont, Erin L. | Lloyd, Jeremy M. | Ehrmann, Werner | Roberts, David | Bentley, Michael J. | Jamieson, Stewart S. R. | Lane, Timothy P. | Darvill, Christopher M.

NERC EDS UK Polar Data Centre

(2022)

Descriptions

The dataset comprises multi-proxy analyses of sediment core, LC7, extracted from Blaso, a large epishelf lake on the margin of 79 °N Ice Shelf, NW Greenland in July-August 2017. The data are used to constrain ice shelf dynamics over the last 8500 calibrated years before present (cal. years B.P., where present is A.D. 1950). A 2 m-long sediment core was recovered with a UWITEC KOL 'Kolbenlot' percussion piston corer to a total sediment depth of 3.74m. Core LC7: 87 m water depth; 79.589 ° N, 22.494 ° E. Geochemical data for the LC7 sediment records consists of XRF-scanner data. This project was funded by the Natural Environment Research Council (NERC) through Standard Grant NE/N011228/1. We thank the Alfred Wegner Institute, and particularly Angelika Humbert and Hicham Rafiq, for their significant logistic support through the iGRIFF project. Additional support was provided from Station Nord (Jorgen Skafte), Nordland Air, Air Greenland and the Joint Arctic Command. Naalakkersuisut, Government of Greenland, provided Scientific Survey (VU-00121) and Export (046/2017) licences for this work.
A 2 m-long sediment core was recovered with a UWITEC KOL 'Kolbenlot' percussion piston corer to a total sediment depth of 3.74 m (LC7) in Blaso (LC7: 79.589 °N, 22.494 °E, 87m). Prior to analysis sediment samples were treated with 20 % hydrogen peroxide to digest the organic material. Once the organic material has been digested the sample was centrifuged and then 20 ml distilled water plus 2 ml sodium hexametaphosphate was added to defloculate the sample. High-resolution elemental abundances were measured on the split core using a GEOTEK X-ray Fluorescence (MSCL-XRF) at 1 mm resolution. We use elemental ratios Ti/Ca as a proxy for terrigenous flux, while Mn/Fe and Br concentrations provides semi-quantitative information about lake oxygenation (Naeher et al., 2013) and marine organic carbon content (Ziegler et al., 2008) respectively. Ti contents in marine sediments is directly linked to terrigenous (siliciclastic) sediment supply delivered by fluvial and/or aeolian transport processes (Arz et al., 1999; Nace et al., 2014), while Ca concentrations reflect changes in the production of calcium carbonate (CaCO^3) by marine plankton (Bahr et al., 2005). High Ti/Ca ratios are indicative of an increased terrigenous flux. The behaviour of Fe and Mn is strongly dependent on processes of oxidation and reduction. Reducing conditions are the result of O2 consumption during organic matter (OM) remineralisation, which releases Fe and Mn. Because Fe oxidises faster than Mn, high Mn accumulation and thus high(low) Mn/Fe ratios reflect oxic (anoxic) conditions. Bromine (Br) is used as a proxy for marine organic carbon, since bromine is found at higher concentrations in marine, compared to terrestrial, organic matter (Ziegler et al., 2008; Seki et al., 2019).
UWITEC KOL 'Kolbenlot' percussion piston corer GEOTEK X-ray Fluorescence (MSCL-XRF)

Keywords


Originally assigned keywords
"EARTH SCIENCE","PALEOCLIMATE","OCEAN/LAKE RECORDS","SEDIMENTS"
79 degrees N
Greenland
Holocene
epishelf lake
ice shelf history
palaeolimnology

Corresponding MSL vocabulary keywords
Holocene

MSL enriched keywords
Phanerozoic
Cenozoic
Quaternary
Holocene
equipment
x-ray spectrometer
x-ray fluorescence spectrometer
minerals
oxide mineral
ice
chemical elements
carbon
analogue modelling material
granular modelling material
natural granular material
calcium carbonate
measured property
carbon (C)
organic carbon
calcium
calcium carbonate
manganese
sodium

MSL enriched sub domains i

geochemistry

Source

https://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/01666

Source publisher

NERC EDS UK Polar Data Centre


DOI

10.5285/71c64bf8-671e-4f22-b4e9-b67b76dc35c8


Creators

Smith, James A.

British Antarctic Survey

ORCID:

https://orcid.org/0000-0002-1333-2544

Callard, Louise

Newcastle University

ORCID:

https://orcid.org/0000-0003-2512-9030

Sánchez Montes, Maria Luisa

University of Colorado Boulder

ORCID:

https://orcid.org/0000-0003-1725-0789

McClymont, Erin L.

Durham University

ORCID:

https://orcid.org/0000-0003-1562-8768

Lloyd, Jeremy M.

Durham University

ORCID:

https://orcid.org/0000-0003-0542-6732

Ehrmann, Werner

University of Leipzig

ORCID:

https://orcid.org/0000-0001-8555-072X

Roberts, David

Durham University

ORCID:

Bentley, Michael J.

Durham University

ORCID:

https://orcid.org/0000-0002-2048-0019

Jamieson, Stewart S. R.

Durham University

ORCID:

https://orcid.org/0000-0002-9036-2317

Lane, Timothy P.

Liverpool John Moores University

ORCID:

https://orcid.org/0000-0002-7116-9976

Darvill, Christopher M.

University of Manchester

ORCID:

https://orcid.org/0000-0001-8175-2658


Contributors

Smith, James A.

Researcher

British Antarctic Survey

ORCID:

https://orcid.org/0000-0002-1333-2544

Callard, Louise

Researcher

Newcastle University

ORCID:

https://orcid.org/0000-0003-2512-9030

Sánchez Montes, Maria Luisa

Researcher

University of Colorado Boulder

ORCID:

https://orcid.org/0000-0003-1725-0789

McClymont, Erin L.

Researcher

Durham University

ORCID:

https://orcid.org/0000-0003-1562-8768

Lloyd, Jeremy M.

Researcher

Durham University

ORCID:

https://orcid.org/0000-0003-0542-6732

Ehrmann, Werner

Researcher

University of Leipzig

ORCID:

https://orcid.org/0000-0001-8555-072X

Roberts, David

Researcher

Durham University

ORCID:

Bentley, Michael J.

Researcher

Durham University

ORCID:

https://orcid.org/0000-0002-2048-0019

Jamieson, Stewart S. R.

Researcher

Durham University

ORCID:

https://orcid.org/0000-0002-9036-2317

Lane, Timothy P.

Researcher

Liverpool John Moores University

ORCID:

https://orcid.org/0000-0002-7116-9976

Darvill, Christopher M.

Researcher

University of Manchester

ORCID:

https://orcid.org/0000-0001-8175-2658

Smith, James A.

ContactPerson

British Antarctic Survey

ORCID:

https://orcid.org/0000-0002-1333-2544

UK Polar Data Centre

DataManager

Natural Environment Research Council

UK Polar Data Centre

Distributor

Natural Environment Research Council

UK Polar Data Centre

HostingInstitution

Natural Environment Research Council


References

10.5285/e44bbc45-9924-401b-a7b8-7939fbb61db2

10.5285/dc8c92a8-c6e0-4edb-97da-5462f4310a9d

10.5285/3d37a409-c1e2-4c25-bdbc-fe495ccff653

10.5285/5a286921-9031-4abc-b227-79bce58f0640

10.5285/e44bbc45-9924-401b-a7b8-7939fbb61db2

10.5285/dc8c92a8-c6e0-4edb-97da-5462f4310a9d

10.5285/3d37a409-c1e2-4c25-bdbc-fe495ccff653

10.5285/71c64bf8-671e-4f22-b4e9-b67b76dc35c8

10.5194/tc-17-1247-2023

10.5194/tc-17-1247-2023


Citation

Smith, J. A., Callard, L., Sánchez Montes, M. L., McClymont, E. L., Lloyd, J. M., Ehrmann, W., Roberts, D., Bentley, M. J., Jamieson, S. S. R., Lane, T. P., & Darvill, C. M. (2022). Geochemical data (XRF-scanner) for core LC7 sediment record from Blaso, a large, epishelf lake in NW Greenland collected July-August 2017 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/71C64BF8-671E-4F22-B4E9-B67B76DC35C8


Dates

Collected:

2017-07-20/2017-08-16

Accepted:

2022-09-14

Created:

2022-09-14

Submitted:

2022-09-14

Issued:

2022-09-16


Language

en


Funding References

Funder name: Natural Environment Research Council

Funder identifier: https://ror.org/02b5d8509

Funder identifier type: ROR

Award number: NE/N011228/1

Award uri: https://gtr.ukri.org/projects?ref=NE/N011228/1

Award title: Greenland in a warmer climate: What controls the advance and retreat of the NE Greenland Ice Stream


Rights

Open Government Licence V3.0


Datacite version

1.0


Geo location(s)

Blaso, NW Greenland Greenland


Spatial coordinates