米氏旋回基本原理及其在陆相湖盆分析中的应用前景

Basic principle of Milankovitch cycle and it's prospect in terrigenous lake basin analysis

米氏旋回是指峰值时间跨度为 2 0～ 5 0 0ka、日地天文轨道参数的周期性变化 ,以及由此产生的气候和沉积地层的旋回性变化。米氏旋回主要通过改变地球表面的太阳辐射能对气候变化进行控制 ,并对沉积作用产生重要的影响。通过沉积地层观测数据的时序分析可以重建米氏旋回 ,对地层的成因和过程进行研究。米氏旋回代表地层学和古气候学研究的前沿课题 ,不仅在深海沉积物的研究中得到了广泛应用 ,对陆相含油气盆地地层分析和油气储集层的预测也都具有重要意义。

Milankovitch cycle refers to the periodic changes of the earth?sun astronomical orbit parameters whose peak time is 20～500ka and the cyclicity changes of climate and sedimentary formations caused by the former. Milankocitch cycle reacts dominantly on climate changes and sedimentation by modifying the sun's radiant energy absorbed on the earth's surface. Milankovitch cycle may be reconstructed and the origin of the formations and its process are studied by time series analysis for observed data of the sedimentary formations. Milankovitch cycle, as a leading edge of the stratigraphy and paleoclimatology, not only is widely applied in the study on deep?sea sediments but also is of great significance both on formation analysis and hydrocarbon reservoir prediction for terrigenous oil?gas?bearing basins.