COMPARISON BETWEEN CARBONATE RECORD OF HEQING CORE, δ¹⁸O RECORD OF THE DEEP SEA AND GRAIN SIZE RECORD OF THE CONTINENTAL LOESS

Based on the scale of time of Heqing core confirmed by astronomical tune, this paper compares the curve of carbonate content of Heqing core with that of the deep sea δ¹⁸O and the loess grain size. The results show that the carbonate record of Heqing core is earlier than deep sea δ¹⁸O record and the grain size record of the continental loess during the mid-Pleistocene revolution, meaning that the uplift of Tibet Plateau plays an important role among the mid-Pleistocene revolution. Further, the curve of the carbonate content of Heqing core corresponds well with that of the deep sea δ¹⁸O, reflecting that the change of the global ice volume plays an important role in the evolution of southwest monsoon.