Citation:

PANGAEA.964375

Name: Dry mass concentrations of individual n-alkanes in sediment core Haem13 from lake Hämelsee
Published: 2024-04-17
License: https://creativecommons.org/licenses/by/4.0/
Keywords: alkanes; Biodiversity; Chironomidae; deuterium; diatoms; ecosystem dynamics; GDGTs; Germany; Haemelsee; LOI; Pediastrum; XRF

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Abstract:

This dataset provides concentrations of n-alkanes for the Lateglacial sediment sequence retrieved from Lake Hämelsee (Germany) in 2013. Concentrations of n-alkanes (ug/g), the Carbon Preference Index (CPI) and the Average Chain Length C21-C33 (ACL) are all presented against both depth (m) and age (cal yr. BP). The n-alkane concentration data provides information on the Lateglacial dynamics of local plant productivity, whereas the ACL and CPI of the sediment samples were determined to estimate origin and preservation condition. A total of 167 samples from the Lateglacial section of the core were processed using a Dionex 350 accelerated solvent extraction (ASE) system. Solid phase extraction (SPE) was used to separate the extracts into an aliphatic, aromatic and alcohol/fatty acid fraction. Separation was achieved by loading the extracts on activated silica columns and eluting each fraction with hexane, hexane/DCM (1:1 v/v) and DCM/MeOH (9:1 v/v) successively. The aliphatic fraction, containing the n-alkanes, was analyzed by gas chromatography-mass spectrometry (GC/MS). The peak areas for each n-alkane homologue were compared to the peak areas from an internal standard (5α-androstane) and an external n-alkane standard mixture for absolute quantification. We refer to Rach et al. (2020) for further details on the exact analytical setup. All measurements were performed in the laboratories of GeoForschungsZentrum Potsdam.

Keyword(s):

alkanes; Biodiversity; Chironomidae; deuterium; diatoms; ecosystem dynamics; GDGTs; Germany; Haemelsee; LOI; Pediastrum; XRF

References:

Rach, Oliver; Hadeen, Xennophone; Sachse, Dirk (2020): An automated solid phase extraction procedure for lipid biomarker purification and stable isotope analysis. Organic Geochemistry, 142, 103995, https://doi.org/10.1016/j.orggeochem.2020.103995

Funding:

European Cooperation in Science and Technology (COST), grant/award no. COST action ES0907 : ES0907 - INTegrating Ice core, MArine and TErrestrial records - 60,000 to 8000 years ago (INTIMATE)

Coverage:

Latitude: 52.766667 * Longitude: 9.316667

Date/Time Start: 2013-07-08T09:00:00 * Date/Time End: 2013-07-12T17:00:00

Minimum Elevation: 22.0 m * Maximum Elevation: 22.0 m

Event(s):

Haemelsee_Haem13 * Latitude Start: 52.766667 * Longitude Start: 9.316667 * Latitude End: 52.766667 * Longitude End: 9.316667 * Date/Time Start: 2013-07-08T09:00:00 * Date/Time End: 2013-07-12T17:00:00 * Elevation Start: 22.0 m * Elevation End: 22.0 m * Lake water depth: 3.4 m * Location: Lake Haemelsee, Germany * Method/Device: Niederreiter Piston corer (NPC) * Comment: Lake sediment sequence retrieved using a 60 mm piston corer deployed from a floating platform.

Comment:

#0 = below detection limit

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	ORDINAL NUMBER	Ord No		Engels, Stefan		Geocode
2	DEPTH, sediment/rock	Depth sed	m	Engels, Stefan		Geocode
3	AGE	Age	ka BP	Engels, Stefan		Geocode
4	n-Alkane C17	C17	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
5	n-Alkane C21	C21	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
6	n-Alkane C22	C22	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
7	n-Alkane C23	C23	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
8	n-Alkane C24	C24	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
9	n-Alkane C25	C25	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
10	n-Alkane C26	C26	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
11	n-Alkane C27	C27	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
12	n-Alkane C28	C28	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
13	n-Alkane C29	C29	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
14	n-Alkane C30	C30	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
15	n-Alkane C31	C31	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
16	n-Alkane C32	C32	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
17	n-Alkane C33	C33	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
18	n-Alkane C34	C34	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
19	n-Alkane C35	C35	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)
20	n-Alkane	n-Alkane	µg/g	Engels, Stefan	Gas chromatography-mass spectrometry, following the analytical setup and protocol of Rach et al. (2020)	C17-C35, per dry mass
21	Carbon Preference Index, n-Alkanes	CPI n-Alkanes		Engels, Stefan
22	Average chain length, n-Alkanes, C21-C33	ACL 21-33		Engels, Stefan

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

3173 data points

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