摘要
本文讨论巴里坤湖 ZK0024孔全新世以来微量元素演化规律的古气候意义,并结合孢粉微体及^(14)C 测定的分析,论述了钻孔剖面中微量元素高值均出现在暖干期、低值则几乎都出现在冷湿期.微量元素及比值在剖面中自下而上有规律的波动,反映了古气候的冷湿与暖干的交替变化,并与山区的冰期,间冰期呈良好的对应关系。
On the basis of the trace element analysis of ZK0024 drill in Barkol Lake in the Holocene,in combination with the data on the sporo-pollen,micropaleont- ology and ^(14)C dating,the palaeoclimate significance from the evolution law of trace elements in ZK0024 drill of Barkol Lake since the Holocene is discussed. The higher and lower values of trace element ratios are corresponds to the warm -dry and cold-humid periods respectively.The regular change of trace clements and their ratios from bottom to top reflects the change of cold-humid and warm -dry alternation of palaeoclimate.The new idea is proposed that the cold-humid period corresponds to the glacial age and the warm-dry period to the interglacial epoch.It is considered that the palaeoclimate evolution pattern belong to the monsoon climate region since the Late Pleistocene.
出处
《地理科学》
CSSCI
CSCD
北大核心
1990年第2期150-158,192,共9页
Scientia Geographica Sinica
基金
国家自然科学基金资助课题
关键词
微量元素
古气候
干旱
Trace elements
Cold humid and warm-dry alternation
Tending to drought
