Date (Creation)

2025-01-22

Date (Revision)

2025-01-22

Date (Publication)

2025-01-22

Date (released)

2025-01-22

Edition

1.0

Unique resource identifier

https://doi.org/10.5285/ebb9d50f-94fb-446b-8e90-de91b3201650

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/01981

Codespace

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

Unique resource identifier

NE/K004514/1

Codespace

award

Other citation details

Please cite this item as: Perren, B., Kaiser, J., Arz, H., Dellwig, O., Hodgson, D., & Lamy, F. (2025). Fossil diatom and geochemistry data from an 11,000 year lake sediment core from Isla Hornos, Cape Horn Archipelago (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/ebb9d50f-94fb-446b-8e90-de91b3201650

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey	Perren, Bianca		Author
Leibniz Institute for Baltic Sea Research Warnemunde	Kaiser, Jerome		Author
Leibniz Institute for Baltic Sea Research Warnemunde	Arz, Helge		Author
Leibniz Institute for Baltic Sea Research Warnemunde	Dellwig, Olaf		Author
British Antarctic Survey	Hodgson, Dominic		Author
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research	Lamy, Frank		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 > Biosphere > Microbiota Taxonomy > Diatoms
• EARTH SCIENCE > Paleoclimate > Paleoclimate Reconstructions
• EARTH SCIENCE > Solid Earth > Geochemistry

Theme

• Cape Horn

• ITRAX

• Southern Ocean

• TEX-86

• Westerlies

• diatoms

• geochemistry

• magnetic susceptibility

• palaeoclimate

• palaeolimnology

Place

• Hornos Island, Cape Horn Archipelago, Chile.

GEMET - INSPIRE themes, version 1.0

• Habitats and biotopes
• Geology

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

Data supplied under Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

No restrictions apply.

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Geoscientific information

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:

Coring: Sediment cores were taken in March 2016 from the deepest part of Isla Hornos Lake (IHL; Zmax = 10.7 m) from a floating platform using both piston and gravity corers to create a composite core length of 4.13 m. Cores were packed onboard the Polarstern and brought back to Germany. At the Leibniz Institute for Baltic Sea Research the cores were split lengthwise, photographed and scanned for micro-XRF and magnetic susceptibility. The working halves were subsampled at 1.0 cm intervals for diatoms and other analyses.

Age-depth model: Age determinations were made using 14C radiometric methods on a range of sediment fractions. Age-depth models were generated using the software package BACON in R (Blaauw and Christen, 2011).

Diatoms: Diatoms were isolated from sediments following standard digestion protocol for large sample numbers, using heat and oxidation with 30% hydrogen peroxide and mounted on plain glass coverslips using Naphrax mounting medium. At least 400 valves were identified per sample at 1000x using Subantarctic and South American reference literature.

TEX86: Lipids were extracted from sediments with a mixture of dichloromethane and methanol. After adding a C46 GDGT as internal standard for quantification, the polar fraction containing GDGTs was isolated by microscale flash column chromatography. The fraction was then filtered. GDGTs were analysed by high performance liquid chromatography atmospheric pressure chemical ionization mass spectrometry (HPLC APCI-MS; Thermo Scientific(TM)). The global lake calibration with error bars of +/-3.7°C was used to convert TEX86 values into mean annual lake surface temperature estimates (Powers et al., 2010).

Magnetic Susceptibility: High-resolution magnetic susceptibility data was accomplished using a Bartington MS2E/1 spot-reading sensor integrated into an automatic logging system. Data shown are 5 point averages.

CNS: Bulk sediment TC, TN and TS were measured at the IOW, Germany, with a EA1110 CHN (CE instruments) elemental analyser.

XRF: Semi quantitative geochemical element data of the sediment core was acquired using an ITRAX X-ray fluorescence (XRF) core scanner at the Leibniz Institute for Baltic Sea Research Warnemünde (IOW). The XRF scanner was equipped with a chromium (Cr) tube and operated at 30 kV and 30 mA, with an exposure time of 15 seconds, and a scanning resolution of 1.0 mm.

ICP MS/OES: The concentrations of major elements (Ti, Al, Fe, Mg, Ca, Na, K, P and S) in sediment acid digestions were determined by inductively coupled plasma optical emission spectroscopy (ICP-OES, iCAP 7400 Duo, Thermo Fisher Scientific) using external calibration and Sc (2 ppm) as internal standard. Following automated online dilution (5-fold) of the digestions and addition of the internal standards Be, Rh and Ir by a PrepFAST system (Elemental Scientific), the trace metal (As, Ba, Cd, Co, Cr, Cu, Mn, Mo, Ni, Rb, Sc, Se, Sr, Th, U, V, Zn and REEs) concentrations were measured by inductively coupled plasma mass spectrometry (ICP-MS, iCAP Q, Thermo Fisher Scientific).

The detailed methodology for diatoms, bulk sediment TC, TN and TS, XRF, magnetic susceptibility, ICP MS/OES, and GDGT/TEX-86 analysis can be found in Perren et al. (2025)

Data collection:

microXRF

Metadata

File identifier

ebb9d50f-94fb-446b-8e90-de91b3201650 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2025-01-22

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