摘要
内蒙古伊盟地区哈马尔太碱湖沉积特征和孢粉组合特征反映了该区近５ｋａ以来的古植被古气候变迁。研究表明，此期间该区植被由阔叶、灌木草原变为疏树灌木草原，最后变为荒漠草原。在这５ｋａ中存在两次暖期两次冷期，近１．６ｋａ以来以冷干为主。湿润气候只存在于４．５～５．５ｋａＢ．Ｐ．，气候总的趋势是由较湿润变干旱直至干燥。
The sporopollen association and alkali deposition in Hamaertai alkali lake in Yikezhao League, Inner Mongolia provide imformations about the paleoclimatic evolution of the recent 5ka span in the vast region around the lake. The time span saw the paleovegetational evolution from broadleaf tree and bush lush grassland through bush spotting grassland to desert grassland. Not just this, paleclimatic changes were striking as well, doing two cold stages and two warm stages in turn. The climate has been characteristic mainly of coldness and aridness since 1.6ka ago and wetness only since between 4.5ka and 5.5ka ago, a rough climatic trend from wet to arid even to dry.
出处
《化工矿产地质》
CAS
1996年第4期295-299,共5页
Geology of Chemical Minerals
关键词
伊盟碱湖
沉积特征
孢粉组合
古植被
古气候
sporopollen association
paleovegetation
paleoclimate
alkali lakes in Yikezhao League
