云南东川拱王山、轿子山地区末次冰期冰川演化序列

Glaciation Sequences of the Last Glaciation in Gongwangshan and Jiaozishan Mountain in Northeastern Yunnan Province

通过野外调查和室内试验数据综合分析 ,确定了拱王山末次冰期以来的冰期演化序列 ,认为本区末次冰期的时代分别为倒数第二次冰期 ,TL 年代为 10～ 11万年 ;末次冰期早期 ,4～ 5万年 ;末次冰盛期 ,1.8～ 2 .5万年和晚冰期 ,时代为 1万年左右 ,各期的古雪线高度分别为 370 0～ 35 5 0 m、372 0 m、375 0～ 370 0 m、以及 395 0 m。

By means of the field investigation and experimental analysis in the laboratory, especially based on the absolute ages, the authors confirm the glacier evolution series of the last glaciation in Gongwangshan Mountain. The penultimate (100～110 ka B.P.), the early (40～50 ka B.P.), the lastglacial maximum (18～25 ka B.P.) and the late stages (around 10 ka B.P.) glacial remains once occurred in the research region. The corresponding ancient snowline altitudes are 3 700~3 550m, 3 720m, 3 750m and 3 950m .