中文摘要：

通过对云南寻甸仙人洞XR1石笋进行TIMS-U系测年、氧碳同位素、有机碳含量分析,重建了寻甸地区中全新世季风气候演化模式：（1）8.0－6.0ka B.P.为温暖湿润期;（2）6.0－5.1ka B.P.为气候突变期,气候由温湿变为冷干;（3）5.1－2.1ka B.P.为凉干期。通过石笋有机碳含量与石笋δ18O记录对比,认为石笋有机碳可以反映气候变化,但是存在滞后效应。最后,利用XR1石笋δ18O记录与北半球33°N太阳辐射量,本文初步分析了云南寻甸地区中全新世气候变化的驱动因素：寻甸地区中全新世气候的整体变化趋势受33°N太阳辐射量控制,同时受中全新世火山活动的影响。

英文摘要：

By dating ages of TIMS-U series and analyzing carbon and oxygen isotope and content of organic carbon in XR1 stalagmite from Xianren Cave in Xundian, Yunnan, the paper reconstructs monsoon climate change pattern during the middle Holoeene in Xundian. It can be divided into three climate periods approximately： （1） 8.0-6.0ka B. P. was warm and wet period; （2） 6.0-5. lka B.P. was climate change period. During the period, climate changed from wet and warm to cold and dry; （3） 5.1-2. lka B.P. was climate recovering period. In the period, the climate changed from cold and dry to the average climate level of the Middle Holocene. After contrasting organic carbon variation to δ^18 O record , it reveals that organic carbon in stalagmite can reflect climate change. But organic carbon variation lags to climate change. At last, on the basis of δ^18O record and summer solar radiation at 33°N latitude, the driven factors of climate change in Xundian, Yunnan Province dring the mid-Holocene is analyzed. The result show the climatic changing trend in Xundian, Yunnan Province was controlled by summer solar radiation at 33°N latitude and may affected by volcanic activity during the mid-Holocene.