東アジアにおける初期人類技術観を覆す西溝遺跡の発見 (Xigou Site Discovery Challenges Long-Held Views on Early Human Technology in East Asia)

2026-01-28 中国科学院(CAS)

中国科学院古脊椎動物・古人類研究所(IVPP)を中心とする国際研究チームは、中国中部・丹江口水庫地域の西溝(Xigou)遺跡で、約16万~7万2千年前にさかのぼる高度な石器技術の証拠を発見し、Nature Communications に発表した。複数のルミネッセンス年代測定により、信頼性の高い年代枠組みを確立。2601点の石器分析から、小型剥片の体系的生産や規格化された加工が確認され、高い技術的洗練が示された。さらに、東アジア最古となる柄付き石器(複合道具)を確認し、計画性や素材理解の進展を裏付けた。これらは、中国の初期人類が技術的に保守的だったという従来像を覆し、Homo longi や Homo juluensis など大型脳をもつ複数人類の共存と行動の複雑化を示唆する。

東アジアにおける初期人類技術観を覆す西溝遺跡の発見 (Xigou Site Discovery Challenges Long-Held Views on Early Human Technology in East Asia)
Location of the Xigou site. (Image by IVPP)

<関連情報>

中国中部における技術革新と柄付き武器の技術(約16万~7万2000年前) Technological innovations and hafted technology in central China ~160,000–72,000 years ago

Jian-Ping Yue,Guo-Ding Song,Shi-Xia Yang,Shu-Gang Kang,Jing-Ya Li,Ben Marwick,Andreu Ollé,Juan Luis Fernández-Marchena,Pei-Xian Shu,Hao-Yu Liu,Yu-Xiu Zhang,Fa-Xiang Huan,Qing-Po Zhao,Bao-Tong Qiao,Zhong-Shan Shen,Cheng-Long Deng & Michael Petraglia
Nature Communications  Published:27 January 2026
DOI:https://doi.org/10.1038/s41467-025-67601-y

Abstract

Technological innovations in Africa and western Europe in the later part of the Middle Pleistocene signal the behavioural complexity of hominin populations. Yet, at the same time, it has long been believed that hominin technologies in Eastern Asia lack signs of innovation and sophistication. Here, we report on technological innovations occurring at Xigou, in the Danjiangkou Reservoir Region, central China, dating to ~160,000–72,000 years ago. Technological, typological, and functional analyses reveal the presence of advanced technological behaviours spanning over a 90,000-year period. The Xigou hominins used core-on-flake and discoid methods to effectively obtain small dimensional flakes to manufacture a diverse range of tool forms. The identification of the hafted tools provides the earliest evidence for composite tools in Eastern Asia, to our knowledge. Technological innovations revealed at Xigou and other contemporary sites in China correspond with increasing evidence for Late Quaternary hominin morphological variability, including larger brain sizes, such as demonstrated at Lingjing (Xuchang) in central China. The complex technological advancements recorded at Xigou indicate that hominins developed adaptive strategies that enhanced their survivability across fluctuating environments of the late Middle Pleistocene and middle Late Pleistocene in Eastern Asia.

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