A luminescence dating study of the upper part of the loess-palaeosol sequence at Kuldara, Khovaling Loess Plateau, Tajikistan

Buylaert, J.P.; Challier, A.; Kulakova, E.P.; Taratunina, N.A.; Thomsen, K.J.; Utkina, A.O.; Sosin, P.M.; Tokareva, O.A.; Anoikin, A.A.; Khujageldiev, T.U.; A, C.K.; Ubaydulloev, N.K.; Murray, A.S.; Kurbanov, R.N.

Авторы: Buylaert J.P., Challier A., Kulakova E.P., Taratunina N.A., Thomsen K.J., Utkina A.O., Sosin P.M., Tokareva O.A., Anoikin A.A., Khujageldiev T.U., A C.Karayev, Ubaydulloev N.K., Murray A.S., Kurbanov R.N.
Журнал: Quaternary Geochronology
Том: 82
Год издания: 2024
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Номер статьи: 101545
DOI: 10.1016/j.quageo.2024.101545
Аннотация: The aim of this study was to develop an independent luminescence chronology for theupper part of the important Loess Palaeolithic site at Kuldara (Khovaling LoessPlateau, Tajikistan). We applied high sampling-depth resolution (n=85) luminescencedating to the upper ~26 m of the sequence from loess L4 to pedocomplex PC0.Luminescence characteristics of the post-IR200 IRSL290 signal from coarse-siltpolymineral grains are satisfactory (reproducible growth and good dose recovery).Comparison with quartz OSL for samples <50 ka and results from modern analogues(Challier et al., these proceedings) shows that the pIRIR200,290 signal is, as expected,sufficiently bleached at deposition. The luminescence chronology extends back to~250 ka and shows distinct erosional hiatuses ranging in duration from ~15 ka to a fullglacial-interglacial cycle (~100 ka); some of these breaks were not identifiable in thefield. We suggest an upper dating limit of 2,5xDc; this yields minimum ages of ~300 kafor this material. Dust Accumulation Rates (DAR) are reconstructed for the LatePleistocene (from ~110 to ~40 ka) and reveal, next to several minor dust accumulationpeaks, two major peaks at the MIS5/4 transition (~73 ka) and at ~40 ka (MIS3b). Weconclude that detailed post-IR200 IRSL290 dating of loess-palaeosol sequences inTajikistan is necessary to exploit fully the potential of this important terrestrial (dust)record.
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A luminescence dating study of the upper part of the loess-palaeosol sequence at Kuldara, Khovaling Loess Plateau, Tajikistanстатья

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