Citation:

PANGAEA.933814

Name: Concentrations of biomarkers (aliphatic fraction) in Hala Hu sediment core H7
Published: 2021-07-16
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Alkenone; Biomarker; China; highly branched isoprenoid (HBI); isotopes; n-alkane; n-alkene; Paleoclimate; Sediment core; Tibetan Plateau

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Published: 2021-07-16 • DOI registered: 2021-12-09

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Abstract:

Concentrations of aquatic (mid-chain n-alkenes, C20-HBIs) and terrestrial (long-chain n-alkanes) biomarker groups were analysed in core H7 from Hala Hu, China. The compounds were quantified relative to an internal standard (5α-androstane) using an Agilent 7890A gas chromatography (GC) instrument, equipped with a mass selective detector (MSD; Agilent 5975C Series) and a flame ionization detector (FID; Agilent 7683B Series). For the GC, a Restek DB-5 column (30 m, inner diameter 0.25 mm, film thickness 0.25 μm) was used.

The lake is located on the northern margin of the Tibetan Plateau (97.24 - 97.47°E, 38.12 - 38.25°N, 4078 m above sea level), along the modern marginal zone between the Asian Summer Monsoon (ASM) and westerlies influences. The core was drilled at the deepest point (65 m) of the lake and extends from 212 to 636 cm sediment depth. According to the age-model (Yan et al., 2020) the covered time period is 7462 - 23610 cal yr BP.

Keyword(s):

Alkenone; Biomarker; China; highly branched isoprenoid (HBI); isotopes; n-alkane; n-alkene; Paleoclimate; Sediment core; Tibetan Plateau

Further details:

Yan, Dada; Wünnemann, Bernd; Zhang, Yongzhan (2020): Late Quaternary lacustrine Ostracoda and their implications for hydro-climatic variation in Northeastern Tibetan Plateau. Earth-Science Reviews, 207, 103251, https://doi.org/10.1016/j.earscirev.2020.103251

Funding:

German Research Foundation (DFG), grant/award no. 259668396 : Palaeoclimatology of Central Asia and the northeastern Tibetan Plateau on basis of compound-specific isotope analysis of biomarkers

Coverage:

Latitude: 38.304980 * Longitude: 97.570810

Minimum DEPTH, sediment/rock: 2.12 m * Maximum DEPTH, sediment/rock: 6.36 m

Event(s):

Hala_Hu_2010-H7 (H7) * Latitude: 38.304980 * Longitude: 97.570810 * Elevation: 4079.0 m * Lake water depth: 64.5 m * Location: Hala Hu * Method/Device: Niederreiter Piston corer (NPC) * Comment: winter 2010

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m	Aichner, Bernhard		Geocode – composite depth
2	Calendar age, minimum/young	Cal age min	ka BP	Aichner, Bernhard		Age model of Yan et al., 2020
3	Calendar age, maximum/old	Cal age max	ka BP	Aichner, Bernhard		Age model of Yan et al., 2020
4	Calendar age	Cal age	ka BP	Aichner, Bernhard		wmean; Age model of Yan et al., 2020
5	Highly branched isoprenoids, C20, per unit sediment mass	C20 HBI/sed	μg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw
6	n-Alkene C21:1, per unit sediment mass	C21:1/sed	µg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw
7	n-Alkane C21, per unit sediment mass	C21/sed	µg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw
8	2,6,10,15,19-pentamethylicosane, per unit sediment mass	PMI/sed	μg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw
9	n-Alkene C23:1, per unit sediment mass	C23:1/sed	µg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw
10	n-Alkane C23, per unit sediment mass	C23/sed	µg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw
11	n-Alkene C25:1, per unit sediment mass	C25:1/sed	µg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw
12	n-Alkane C25, per unit sediment mass	C25/sed	µg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw
13	n-Alkene C27:1, per unit sediment mass	C27:1/sed	µg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw
14	n-Alkane C27, per unit sediment mass	C27/sed	µg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw
15	n-Alkane C29, per unit sediment mass	C29/sed	µg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw
16	n-Alkane C31, per unit sediment mass	C31/sed	µg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw
17	n-Alkane C33, per unit sediment mass	C33/sed	µg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw
18	n-Alkane C35, per unit sediment mass	C35/sed	µg/g	Aichner, Bernhard	Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent	dw

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

1615 data points

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