中文摘要：

文章在运用自动轨道调谐方法确定鹤庆钻孔时间标尺的基础上，首先分阶段探讨鹤庆钻孔碳酸盐指标的演化特点，然后采用频谱分析和滤波分析方法，通过对鹤庆钻孔碳酸盐沉积记录的分析，探索西南季风轨道尺度的演化规律。综合分析结果显示：天文因素是影响西南季风演化的重要因素，但并非惟一因素，西南季风的演化中存在着中更新世转型和1．55MaB．P．附近的转型，后者推测与青藏高原隆升及全球冰体积变化有关；在西南季风演化的不同阶段出现100ka，73ka，66ka，54ka，41ka，30ka，23ka，19ka，15ka和10．7ka等周期。

英文摘要：

Heqing Basin is located at the junction of southeast Qinghai-Tibetan Plateau and northwest Yunnan-Guizhou Plateau ,China. The basin belongs to the southwest monsoon region, with its environmental evolution deeply affected by the southwest monsoon. The Heqing Core lies in the center of the Heqing Basin. The core is about 737. 72m long and dominated by lacustrine deposits. 1989 samples were collected. Carbonate content was determined by titration. By using automatic orbital tuning method to ascertain the time scale of the Heqing Core, we firstly discussed the evolutionary characters of carbonate content in the core. Three evolutionary stages have been recognized： 2. 78 - 1.55MaB. P., 1.55 -0. 99MaB. P., and 0. 99 - 0MaB. P. During 2. 78 - 1.55MaB. P., carbonate content showed a tendency of low value-high value-low value ; during 1.55 -0. 99MaB. P., the periodic gyration character of carbonate content was very much outstanding ; while from 0. 99MaB. P. to 0, fluctuant period of carbonate content was evidently longer. We then adopted Spectral analysis and Filter methods to analyse carbonate content and explore the regulation of the orbital scale evolution of the southwest monsoon.. The result shows that the astronomical factor is not the only unique but an important factor for the evolution of the southwest monsoon. Two revolutions, the Mid-Pleistocene Revolution and the near 1.55MaB. P Revolution are recognized during the evolutionary history of the southwest monsoon. As for the near 1.55MaB. P. Revolution, it is inferred to be related with the uplift of the Tibet Plateau and the change of the global ice volume. Furthermore, there are different cycles such as 100ka, 73ka, 66ka, 54ka, 41ka, 30ka, 23ka,19ka, 15ka and 10. 7ka in the various stages of the evolution of the southwest monsoon.