青藏高原西南部仲巴地区已发现有3处细石器遗存地点,在仲巴地区选取了一个全新世风成沉积剖面进行年代测试分析以及粒度、地球化学元素等环境指标的分析,探讨仲巴地区的人类活动与气候变化及风沙活动的关系,进而推算细石器遗存的时代.8.9~7.3 ka BP为气候湿润,风沙活动弱,成壤作用较强的时期,自然资源相对丰富,能够为细石器先民提供良好的狩猎活动条件.到7.3~3.8 ka BP时期,气候干燥,风沙活动强,不利于人类活动.因此推测该区细石器遗存的形成时代在8.9~7.3 ka BP左右.
英文摘要:
Three Microlith relic sites have been found in Zhongba area, southwestern margin of Qinghai-Tibet Plateau.Anaeolian deposit (ZZ) near Microlith relid sites was chosen,accelerator mass spectrometry (AMS) ~(14)C analysis and optically stimulated luminescence (OSL) of ZZ were used to determine ages, grain size and geochemical parameters were analysed. Relationship between Holocene environment and human activities was reconstructed, the time of Microlith human activities in Zhangba area was determined. It was found that from 8.9 ka BP to 7.3 ka BP, climate was humid, aeolian activity was weak with strong pedogenesis, with relative abundance of natural resources which were good for hunting of Micorlith human. From 7.3 ka BP to 3.8 ka BP, climate was dry, aeolian activity was strong, which was not conducive to human activities. It is therefore concluded that the formation time of Zhongba Microlith relics might be from 8.9-7.3 ka BP.