Trace elements, stable isotopes and rare earth elements in ostracod valves from sediment cores from Lake Nam Co and Tangra Yumco, Tibetan Plateau

doi:doi:10.1594/PANGAEA.941495

Trace elements, stable isotopes and rare earth elements in ostracod valves from sediment cores from Lake Nam Co and Tangra Yumco, Tibetan Plateau

High-resolution multi-proxy records from two lakes on the southern Tibetan Plateau, Nam Co and Tangra Yumco, are used to infer long-term variations in the Asian monsoon system. We examine the moisture evolution during the Late Glacial Maximum and Holocene using the trace element and stable isotope composition of ostracod shells. The sediment records covering the past 24 cal. ka BP and 18 cal. ka BP, respectively, demonstrate the suitability of ostracod shell chemistry as paleoenvironmental proxy. We analysed (i) Mg/Ca, Ba/Ca and Sr/Ca ratios as salinity proxies, (ii) Fe/Ca, Mn/Ca and U/Ca ratios representing redox conditions and microbial activity, and (iii) rare earth elements (REEs) reflecting weathering and changes in provenance.

BibTex:

@dataset{Börner_Nicole_and_Jochum_Klaus_Peter_and_Stuhr_Marleen_and_Abstein_Michelle_and_Plessen_Birgit_and_Frenzel_Peter_and_Wang_Junbo_and_Zhu_Liping_and_Schwalb_Antje_2022,
    abstract = {High-resolution multi-proxy records from two lakes on the southern Tibetan Plateau, Nam Co and Tangra Yumco, are used to infer long-term variations in the Asian monsoon system. We examine the moisture evolution during the Late Glacial Maximum and Holocene using the trace element and stable isotope composition of ostracod shells. The sediment records covering the past 24 cal. ka BP and 18 cal. ka BP, respectively, demonstrate the suitability of ostracod shell chemistry as paleoenvironmental proxy. We analysed (i) Mg/Ca, Ba/Ca and Sr/Ca ratios as salinity proxies, (ii) Fe/Ca, Mn/Ca and U/Ca ratios representing redox conditions and microbial activity, and (iii) rare earth elements (REEs) reflecting weathering and changes in provenance.},
    author = {Börner, Nicole and Jochum, Klaus Peter and Stuhr, Marleen and Abstein, Michelle and Plessen, Birgit and Frenzel, Peter and Wang, Junbo and Zhu, Liping and Schwalb, Antje},
    doi = {10.1594/PANGAEA.941495},
    institution = {PANGAEA (Biological Classification)},
    keyword = {'Ostracoda', 'Paleoclimate', 'Paleolimnology', 'Rare earth elements', 'Stable carbon and oxygen isotopes', 'trace elements ratio'},
    title = {Trace elements, stable isotopes and rare earth elements in ostracod valves from sediment cores from Lake Nam Co and Tangra Yumco, Tibetan Plateau},
    url = {https://service.tib.eu/ldmservice/vdataset/png-doi-10-1594-pangaea-941495},
    year = {2022}
}