Journal of Geographical Sciences >
Luminescence dating of reticulated red clay buried in Lanshanmiao Paleolithic site in Zhejiang Province, southern China
Lu Ying, PhD Candidate, specialized in physical geography. E-mail: mg1927013@smail.nju.edu.cn |
Received date: 2020-03-06
Accepted date: 2020-06-02
Online published: 2020-11-25
Supported by
National Natural Science Foundation of China(41972185)
National Natural Science Foundation of China(41690111)
Copyright
The Lanshanmiao (LSM) Palaeolithic site, which was excavated in the summer of 2017 by the Zhejiang Provincial Institute of Cultural Relics and Archaeology, is the only excavated palaeolithic site in central Zhejiang Province to date. Luminescence dating methods, including optical stimulated luminescence (OSL) and thermal transfer OSL (TT-OSL) for quartz and post-infrared (IR) stimulated luminescence (pIRIR290) for feldspar, were used to determine the age of the LSM site. The results showed that the LSM section developed before 145.5 ± 12.5 ka and ended after 17.1 ± 1.0 ka. The TT-OSL dating of samples NJU2576 and NJU2615 showed that palaeolithic artifact-bearing layer was between 150 and 100 ka in age. The age range of the palaeolithic layer mainly corresponded to the transition between Marine Isotope Stage (MIS) 6 and MIS5. Our study showed that hominins prominently occupied the LSM site during the glacial and interglacial stages, when it exhibited a floodplain environment.
LU Ying , SUN Xuefeng , XU Xinmin , LIU Yalin , YI Shuangwen . Luminescence dating of reticulated red clay buried in Lanshanmiao Paleolithic site in Zhejiang Province, southern China[J]. Journal of Geographical Sciences, 2020 , 30(9) : 1436 -1450 . DOI: 10.1007/s11442-020-1791-y
Figure 1 Locations of the LSM (9), Qiliting (QLT) (5), and Yindinggang (YDG) (3) sites and other areas in the Zhejiang Province, including 1-Zijinshan, 2-Hexi Cave No. 1, 4-Wangjiashan, 6-Shangmakan, 7-Tonglu Man, and 8-Jiande Man |
Figure 2 Fieldwork at the LSM site and the stone artifacts uncovered (a. Scenery at the LSM Palaeolithic site; b. LSM stratigraphy with blue points indicating the sampling positions; c. palaeolithic artifacts) |
Figure 3 (a) and (b) DRC acquired using the quartz OSL for samples NJU2572 and NJU2574; (c) radial plot of quartz aliquots obtained by OSL for sample NJU2572; (d) DRC acquired with the quartz TT-OSL for sample NJU2574 (The inset of (a), (b) and (d) shows the decay curves of the natural signal) |
Figure 4 (a) and (b) DRC obtained using TT-OSL and pIRIR290 for sample NJU2615 (The inset shows the decay curves.); (c) and (d) radial plot for NJU2578, using quartz TT-OSL and feldspar pIRIR290, respectively |
Figure 5 Curves of the magnetic susceptibility, radiation dose (U, Th, and K), and water content |
Table 1 Dating results of quartz OSL, TT-OSL, and feldspar pIRIR290 dating methods |
Lab No. | Depth (m) | wc (%) | U (ppm) | Th (ppm) | K (%) | Dose rate (Gy/ka) | De (Gy) | Age (ka) | |||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
OSL & TT | pIRIR290 | OSL | TT-OSL | pIRIR290 | OSL | TT-OSL | pIRIR290 | ||||||
NJU2572 | 0.10 | 18.2 | 2.88±0.11 | 14.1±0.38 | 0.87±0.04 | 2.44±0.11 | - | 41.7±1.4 | 47.0±7.6 | - | 17.1±1.0 | 19.9±3.4 | - |
NJU2574 | 0.75 | 18.0 | 2.67±0.10 | 13.6±0.38 | 0.86±0.04 | 2.30±0.11 | - | >217 | 222.5±4.8 | - | >94 | 96.8±5.4 | - |
NJU2576 | 1.45 | 16.3 | 2.89±0.11 | 14.4±0.39 | 0.88±0.04 | 2.42±0.12 | - | - | 291.4±39.4 | - | - | 120.3±17.5 | - |
NJU2577 | 1.75 | 14.6 | 3.21±0.12 | 14.7±0.40 | 0.82±0.04 | 2.48±0.12 | - | - | 311.1±45.1 | - | - | 125.6±19.4 | - |
NJU2578 | 2.75 | 15.6 | 3.44±0.12 | 15.7±0.42 | 1.03±0.04 | 2.73±0.13 | 3.20±0.13 | >331 | 346.7±17.3 | 376±14 | >121 | 126.9±9.3 | 118±7 |
NJU2615 | 4.00 | 18.6 | 3.36±0.13 | 14.9±0.42 | 0.91±0.04 | 2.47±0.12 | 3.00±0.12 | - | 358.7±24.6 | 412±42 | - | 145.5±12.5 | 167±18 |
* “>” means saturated age estimation; “wc” = water content |
Figure 6 The LSM section, ages, and the cultural layer correspondence to marine oxygen isotopic stages |
We thank Zeng Qiongxuan, Xu Xinghua, and Lu Yiming for their assistance.
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