8 ka祁连山中段腹地人类活动的新证据

目前祁连山中段腹地有少量新石器时代遗址和较为丰富的青铜时代遗址，未发现更早的人类活动遗迹。近期对腹地内黄藏寺一处具有原生地层的细石器遗存剖面（HZS），系统采集其年代样品、环境指标（粒度、色度）样品及地层石器，开展实验测定和GIS模拟路线分析，结合青藏高原与周边区域已发表的史前人群研究资料，揭示祁连山中段腹地史前人群的活动时间、环境背景、与毗邻地区史前人群的联系及其交流路线。结果显示：史前人群约在7.98~6.10 ka期间于黄藏寺一带活动，这是祁连山中段腹地目前发现最早的史前人类活动证据。HZS剖面粒度、色度指示的全新世早中期温湿气候与祁连山中段腹地较好的生态环境，为细石器人群开展狩猎采集活动提供了适宜的自然条件。HZS剖面的细石器反映出该时段史前人群从事狩猎采集活动，其细石器体现的技术特征与青海湖盆地细石器技术较为相似，揭示了高原东北边缘山区与高原内部区域的史前人群具有密切联系。GIS模拟路线显示，黑河谷地可能为贯通河西走廊与青藏高原间史前人群迁移、交流的重要路线，而黄藏寺细石器遗存为该路线上一处狩猎地点。

8 ka New evidence of human activities in the central Qilian hinterland

The northeastern part of the Qinghai-Tibet Plateau is one of the earliest areas on the plateau where humans set foot and were active, with rich prehistoric cultural remains and a complete cultural sequence. However, there are only a few Neolithic sites and relatively abundant Bronze Age sites in the Central Qilian hinterland in the northeastern part of the plateau, lacking the remains of earlier human activities.