摘要
银川盆地中更新世以来的孢粉记录及据此所重建的古气候参数 ,揭示了该区中更新世以来的古气候演变特征 ,其演变经过了温湿→凉湿→温和→冷湿→温干→凉较湿→冷湿→温干→凉润→温较干→温干的变化 ,并与新疆地区、黄土高原以及深海 δ1 8O曲线进行了对比 ,结果表明各地的古环境变化大致同步 ,该区由于位置靠西 ,邻近沙漠 ,最近地质历史时期的区域性干旱特色明显。
The sporopollen records and reconstructed parameters reveal the characters of paleoclimate changes since mid Pleistocene in Yinchuan basin.The paleoclimate changes are shown by humid temperate→humid cool→temperate→humid cold→temperate arid→comparatively humid cool→humid cold→temperate arid→cool moist→comparatively temperate arid→temperate arid periods, compared with those of Xinjiang,Loess Plateau and the deep sea δ 18 O curve.It tells that the changes of paleoenvironment were roughly synchronous.Yinchuan basin is located near a desert so that it apparently presents regional arid characteristics in the modern geological history.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2001年第3期43-49,共7页
Marine Geology & Quaternary Geology
基金
原地质矿产部部控项目"银川平原农业生产基地地下水资源和环境地质综合勘探评价"
