Publication Date:
2024-06-12
Description:
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.
Keywords:
2,6,10,15,19-pentamethylicosane per unit sediment mass; Alkenone; Biomarker; Calendar age; Calendar age, maximum/old; Calendar age, minimum/young; China; DEPTH, sediment/rock; Gas chromatography - mass spectrometry - flame ionization detector (GC/MS/FID) Agilent; H7; Hala_Hu_2010-H7; Hala Hu; highly branched isoprenoid (HBI); Highly branched isoprenoids C20 per unit sediment mass; isotopes; n-alkane; n-Alkane C21, per unit sediment mass; n-Alkane C23, per unit sediment mass; n-Alkane C25, per unit sediment mass; n-Alkane C27, per unit sediment mass; n-Alkane C29, per unit sediment mass; n-Alkane C31, per unit sediment mass; n-Alkane C33, per unit sediment mass; n-Alkane C35, per unit sediment mass; n-alkene; n-Alkene C21:1 per unit sediment mass; n-Alkene C23:1 per unit sediment mass; n-Alkene C25:1 per unit sediment mass; n-Alkene C27:1 per unit sediment mass; Niederreiter Piston corer; NPC; Paleoclimate; Sediment core; Tibetan Plateau
Type:
Dataset
Format:
text/tab-separated-values, 1615 data points
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