西藏林芝地区第四系新知

NEW KNOWLEDGE OF THE QUATERNARY STRATA OF THE LINZHI AREA, TIBET

对西藏林芝—米林盆地的更新世及其以后的沉积进行了调查研究,磁性地层分析表明这些湖积物的历史不到4万年,在米林的古湖泊沉积物中采获Polypodiaceae等晚更新世孢粉,于米林县白过多更新世湖积之上全新统冲积中新发现林芝智人的头盖骨、牙齿及石斧等,为研究青藏高原第四纪地质作用和古环境、古气候变化及古人类活动等提供了新资料。

The Pleistocene sediments in the Linzhi--Milin Basin of Tibet have been surveyed and studied. The magnetostratigraphic study shows that these lacustrine deposits are less than 40 ka B.P. in age. The Late Pleistocene flora and sporo-pollen, Polypodiaceae and so on, were collected from the ancient lacustrine deposits of the Milin Basin. Skill, teeth and stone axes of Linzhi Homo sapiens were found in the Holocene alluvial soil above the Pleistocence lacustrine deposits at Baiguoduo of Milin County, providing new data for the studies of the Quaternary geology, palaeovironments, palaeoclimate change, and ancient human activities.