内蒙古额济纳旗苏泊淖尔石制品的发现及当时的环境特征

Discovery of ancient artifacts at Sogo Nur, Ejin Qi, Inner Mongolia, and environmental features at that time.

在进行地质环境调查过程中,在内蒙古额济纳旗苏泊淖尔Ⅰ级湖积阶地面上发现古人类遗存的石制品,包括石砧、石斧、石片、石核等,大致应属于全新世的遗存。天鹅湖剖面距地表70.5cm深处14C测年结果为4930a±152a,表明该剖面主要形成于全新世,与苏泊淖尔石器的时代相同,其中的记录可反映古人类活动时期的气候特征。据孢粉组合变化可以确定,该区气候总体处于干旱—半干旱状态。剖面下部在相对干旱的背景下显示出一定程度的温湿气候环境,剖面中部则为干旱稳定发展期,成为全剖面干旱程度最强、温度较低的时期,而剖面上部又表现出温度和湿度略有升高的趋势。

Some prehistoric ancient human artifacts, including the stone block, axe, flakes and cores, are discovered on the surface of terrace-I of Sogo Nur, Ejin Qi, Inner Mongolia, during geological environmental surveys. Those artifacts are supposed to be Holocene remains. 14C dating of a sample taken from the section of Swan Lake at 70.5 cm below the surface gave an age of 4930±152 a, indicating that the section mainly formed in the Holocene, which is the same as the age of the stone implements found at Sogo Nur. Its record may reflect the climatic features during the activities of the ancient human species. According to spore-pollen analysis, the climate was generally arid or semiarid during this period. Three climate stages can be distinguished. The lower part of the section shows a somewhat warm-wet climate against the relatively dry background in the early stage. The middle part of the section denotes a period of steady development of the dry environment, representing the most arid and cold stage of the whole section. The upper part of the section shows the trend of increase in temperature and humidity in the late stage.