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| 1 | Technological innovations at the onset of the Mid-Pleistocene Climate Transition in high-latitude East Asia显示文摘The interplay between Pleistocene climatic variability and hominin adaptations to diverse terrestrial ecosystems is a key topic in human evolutionary studies.Early and Middle Pleistocene environmental change and its relation to hominin behavioural responses has been a subject of great interest in Africa and Europe,though little information is available for other key regions of the Old World,particularly from Eastern Asia.Here we examine key Early Pleistocene sites of the Nihewan Basin,in high-latitude northern China,dating between~1.4 and 1.0 million years ago(Ma).We compare stone-tool assemblages from three Early Pleistocene sites in the Nihewan Basin,including detailed assessment of stone-tool refitting sequences at the~1.1-Ma-old site of Cenjiawan.Increased toolmaking skills and technological innovations are evident in the Nihewan Basin at the onset of the Mid-Pleistocene Climate Transition(MPT).Examination of the lithic technology of the Nihewan sites,together with an assessment of other key Palaeolithic sites of China,indicates that toolkits show increasing diversity at the outset of the MPT and in its aftermath.The overall evidence indicates the adaptive flexibility of early hominins to ecosystem changes since the MPT,though regional abandonments are also apparent in high latitudes,likely owing to cold and oscillating environmental conditions.The view presented here sharply contrasts with traditional arguments that stone-tool technologies of China are homogeneous and continuous over the course of the Early Pleistocene. | Shi-Xia Yang Fa-Gang Wang Fei Xie Jian-Ping Yue Cheng-Long Deng Ri-Xiang Zhu Michael D.Petraglia | 2021 | National Science Review2021，8，1： | 6 |
| 2 | 华北泥河湾盆地铺路哺乳动物群的磁性地层学定年显示文摘华北泥河湾盆地的晚新生代河湖相沉积地层,产出了十分丰富的旧石器和哺乳动物化石,记录了早期人类活动以及晚上新世以来哺乳动物群的演化过程.作为广义泥河湾动物群之一,铺路动物群化石点位于盆地内的壶流河东侧,含有晚上新世及早更新世哺乳动物化石.本文结合生物地层学和岩石地层学,对含铺路哺乳动物化石的河湖相沉积物,进行详细的岩石磁学及高分辨率的磁性地层学研究,旨在对铺路哺乳动物群进行精确定年.结果表明,铺路剖面河湖相沉积物的磁性矿物主要为磁铁矿、磁赤铁矿和赤铁矿,平均粒度以准单畴为主.铺路剖面河湖相沉积物记录了布容正极性时(Brunhes normal chron)早期、松山负极性时(Matuyama reverse chron)、高斯正极性时(Gauss normal chron)和吉尔伯特负极性时(Gilbert reverse chron)晚期,铺路动物群产出在留尼旺(Réunion)地磁漂移之前,凯纳(Kaena)负极性亚时之后,年代约为3.0~2.2 Ma.本研究结果将广义泥河湾动物群的年代下限延至约3.0 Ma.此外,结合泥河湾盆地古气候学及古环境学研究结果,表明在上新世与更新世过渡期间,泥河湾动物群的演化受气候环境变化的影响,更适应干旱寒冷的生存环境. | 李嘉皓 刘平 高显丽 | 2024 | 地球物理学报2024，67，1： | 0 |
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