The first radiometric age by isochron 26Al/10Be burial dating for the Early Pleistocene Yuanmou hominin site, southern China

Quantifying Late Pleistocene to Holocene Erosion Rates in the Hami Basin, China: Insights Into Pleistocene Dust Dynamics of an East Asian Stony Desert

“…Following the procedures of Luo et al. (2020), all eleven sandstone samples were processed for quartz separation at the pre‐treatment laboratory of the China University of Geosciences (Wuhan). The purified quartz, checked by inductively coupled plasma‐optical emission spectrometry (ICP‐OES), was spiked with ∼0.3 mg of a 9 Be carrier (1,041 ± 8 ppm 9 Be) and 10 Be/ 9 Be ratios were measured using the Accelerator Mass Spectrometer at the PRIME Lab in Purdue University.…”

“…The paired samples from different sites were collected from relatively proximal positions with varying elevation and different morphological locations (i.e., the interior or edge and the upwind or downwind regions of the yardang field) to aid in elucidating the spatial variability of erosion rates (Figure 2 and Table S1 in Supporting Information S1). Following the procedures of Luo et al (2020), all eleven sandstone samples were processed for quartz separation at the pre-treatment laboratory of the China University of Geosciences (Wuhan). The purified quartz, checked by inductively coupled plasma-optical emission spectrometry (ICP-OES), was spiked with ∼0.3 mg of a 9 Be carrier (1,041 ± 8 ppm 9 Be) and 10 Be/ 9 Be ratios were measured using the Accelerator Mass Spectrometer at the PRIME Lab in Purdue University.…”

Javanese Homo erectus on the move in SE Asia ca. 1.8 Ma

“…At a more general scale, our TCN ages obtained for the first appearance datum of H. erectus in Sangiran advocate for an early peopling of Sundaland by H. erectus, contemporary with their Chinese [25,48] and Georgian [49,50] counterparts. This result reignites the long-standing controversy over the Homo erectus on the move origin and dispersal pathways of archaic humans [26,48,51] and invites a reexamination of the out-of-Africa paradigm, which provides a global roadmap for the dispersal of the genus Homo, but which one-way direction may be questioned [12,[52][53][54][55].…”

“…Homo erectus on the move A refined knowledge of this time period is crucial to decipher the dispersal and behavior of Javanese H. erectus for at least two reasons. First, depending on this age, it is unclear if Javanese H. erectus directly arrived along the coastlines in a single out-of-Africa episode, or discontinuously stemmed from smaller size groups that expanded earlier in China [24,25]; it implies that early humans could have entered Sundaland from different entry points in mainland Asia (Fig. 1a).…”

Chronological problems in Chinese human fossil sites

“…TL测年法 测定古人类用火烧烤过的石制品年代已达40多万 年 [15] . ESR以及ESR/U系测年法的材料主要为大型食草 类哺乳动物牙齿的牙珐琅质部分, 测年范围可以达到 和1.70 Ma [27] 、 图 3 (网络版彩色)古人类遗址常用测年方法定年范围示意图 Figure 3 (Color online) Dating range of methods used in human fossil sites ESR年代1.10~1.60 Ma [28] , 以及化石层上部砾石的 26 Al/ 10 Be埋藏年龄1.54 Ma [29] . 虽然测年结果存在较大 差异, 但考虑古地磁年代1.70 Ma [ 和1.62~1.63 Ma [31] , 化 石层下部 26 Al/ 10 Be埋藏年代为1.8 Ma [23] , 以及生物地层 为早更新世 [32] .…”