【摘要】 通过黄土区湖泊沉积研究来恢复古气候、古环境 ,是对黄土区古气候、古环境研究的补充和检验。通过山西运城盆地硝池湖泊沉积物的多环境代用指标分析 ,结合史料记载 ,探讨了该地区 11ka BP以来古气候演化和湖面波动的历史。研究表明 ,该地区存在 YD(Younger Dryas)事件 ,进入全新世后气候有变湿的趋势 ,最高湿润度发生在 7.88～ 5 .15和 5 ka BP后 ,气候逐渐变干。湖面波动与气候波动相关 ,全新世早期湖面开始上升 ,湖泊扩张 ,5 ka BP后湖泊萎缩 ,盐类结晶析出更多还原

【Abstract】 A 2 8 m long sediment sequence was collected from the center of the Xiaochi Lake,Yuncheng basin in June 1997 and sampled at 2 cm intervals in the field.An 11 ka chronology was constructed by 6 14 C dating results.The history of palaeoclimate and fluctuation of lake level was studied on the basis of chemical elements,pigments,carbonate content and Ostracoda records in the sediment together with historical data.Around 11 kaBP,it was cold and arid.The palaeoclimate became wet at the beginning of Holocene and the degree of wetness came to its peak during 7 88～5 15 kaBP.The climate tended to become dry from 5 kaBP.The lake level fluctuated due to palaeoclimatic variation.The lake enlarged from Holocene but shrank at 5 kaBP.更多还原