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Ref ID: 27356
Ref Type: Journal Article
Authors: Sun, Xuefeng
Yi, Shuangwen
Lu, Huayu
Zhang, Wenchao
Title: TT-OSL and post-IR IRSL dating of the Dali Man site in central China
Date: 2017
Source: Quaternary International
Abstract: Showing features associated with archaic <i>Homo sapiens</i> and evolved <i>Homo erectus</i>, the Dali skull is a key fossil for understanding human evolution in China. Various dating methods such as U-series, IRSL, TL, ESR, ESR/U-series, and stratigraphical correlation with central Loess Plateau sequence were used to estimate the antiquity the Dali Man site with varying results. In this study, a total of 12 samples were taken in the sequence in the Dali Man site, from the aeolian loess-palaeosol sequence and underlying fluvial deposit layers including the palaeoanthropological level and dated by several optically stimulated luminescence (OSL) methods: coarse-grained quartz SAR OSL, thermally transferred OSL (TT-OSL), and K-feldspar post-IR infrared (IR) stimulated luminescence (post-IR IRSL
pIRIR<sub>290</sub>) methods. Results show that the TT-OSL and pIRIR<sub>290</sub> ages were consistent up to ∼100 ka. For older samples, the feldspar ages were significantly older. These pIRIR<sub>290</sub> ages increased with the stratigraphy up to 310 ka. The best age estimation of the Dali Man layer providing by the feldspar pIRIR<sub>290</sub> suggested that the Dali Man lived in late period of L3 (MIS 8) stage. Furthermore, correlating the pIRIR<sub>290</sub> ages between 267.7 ± 13.9 ka and 258.3 ± 14.2 ka and new pollen analysis, we proposed a new viewpoint that the Dali Man was likely to live during a transitional period from glacial to interglacial climate in the S2/L3 (MIS 7/8) stage.
Date Created: 3/28/2017
Volume: 434
Page Start: 99
Page End: 106