以气候变化为标志的中国第四纪地层对比表

随着新技术方法的不断引入和地层学多元划分理论的提出,除了传统的岩石地层、生物地层和年代地层,又开拓了地貌地层、磁性地层、土壤地层、同位素地层、事件地层和旋回地层等新的分支。高分辨率古气候研究的需要,促使我们去探索第四纪地层,特别是陆相地层新的划分方案。本文作者在各自对不同的成因类型的第四纪沉积物的研究中,都或多或少参照深海氧同位素阶段进行过地层的划分和对比的尝试,自然就产生了以氧同位素阶段为参照的划分和对比第四纪地层的设想。我们“抛砖引玉”,提出了中国第四纪ＭＩＳ地层表,只求“有”,尚不能求“准”,希望我们的工作能够推进我国第四纪地层的研究,对第四纪科学的发展作出贡献。

TABLE OF CHINESE QUATERNARY STRATIGRAPHIC CORRELATION REMARKED WITH CLIMATE CHANGE

Rapid progresses have been made in stratigraphy during past decades with the new idea of multiple subdivision in theoretical stratigraphy itself and with the development of new techniques and by them being used in stratigraphic studies. Several new branches, such as magnetostratigraphy, pedostratigraphy, climatostratigraphy and stable isotope stratigraphy frequently appeared in the literature. These new branches are with special importance in the high resolution paleoclimatic research during the Quaternary. Most of the authors of this paper are thinking of a new way to subdivide and to correlate the stratigraphic sequences in their studies dealing with different kinds of Quatemary deposits in China. With the first successful attempt of the correlation of the Luochuan loess-paleosol sequence with deep sea sediments by Liu and Heller in early 80' s, several of us thereafter tried more or less to correlate our sequences to the marine isotope stages (MIS). The preliminary results of our practice stimulated us to perform a stratigraphical table of Quaternary deposits in China based mainly on the correlation with MIS. An attempt is made with the purpose of "throw out a minnow to catch a whale". We only tried to do it and did not expect the satisfactory at this moment. It seems we still have a long way to perform this table. We hope all Quaternary scientists in China will concern this stratigraphical table and gradually make it more perfect and therefore more useful.