地理科学 ›› 1982, Vol. 2 ›› Issue (4): 319-326.doi: 10.13249/j.cnki.sgs.1982.04.319

• 论文 • 上一篇    下一篇

以沉积学方法论“北京猿人”生活时期的古气候

谢又予   

  1. 中国科学院地理研究所
  • 出版日期:1982-07-20 发布日期:1982-07-20

THE PALEOCLIMATE RESEARCH OF THE PERIOD OF “PEKING MAN” WITH METHOD OF SEDIMENTOLOGY

Xie Youyu   

  1. Institute of Geography, Academia Sinica
  • Online:1982-07-20 Published:1982-07-20

摘要: 在确定古气候状况方面,生物化石无疑具有重要的作用,而沉积学方法作为一种补充手段,更具有可获得古气候演化序列的连续资料和不受化石丰缺局限的优点。本文采用沉积学方法对“北京猿人”洞穴堆积物进行了综合分析研究,为“猿人”生活时期的古气候研究提供了新的佐证。同时,也使第四纪的研究从晚更新世延伸到中更新世,并赋予了确切的时间标尺。不妥之处,请指正。

Abstract: It is often feasible to study paleoclimate by sedimentology means.Its advan tage is that a continual sequence of climate changes can be established without limited by the lack of fossils,etc.However,it must be noted that the method of synthetic analysis should be used and also that some special and efficient methods should be chosen according to specified geologic and geomorphic conditions; not all methods are good for use.For instance,in a limestone area the change of content of calcium carbonate in dispersive state is relating to the bedrock rather than dipending on the climate during deposition.Conversely,when cllcium carbonate is present in cemented state,the degree of weathering and recrystallizing of the calcium Carbonate itself as well as the volume and size of the fragmentary limestone in the deposits,and whether they themselves to be solute or cemented, all these can reflect definite climate environment. From results of various analysis for sediments accumulated in the cave of “Peking Man”,(i.e.the existing state of the calcium carbonate,the clay mineral composition,the index of geochemic,the degree of surface corrosion of quartz sand and the mineral characteristics of the debris in the sediments) six different climate stages can be divided for the period of 800,000 Y.B.P.-230,000 Y.B.P,. and they can fully reflect the changes between cold and warm as well as between arid and humid conditions.Besides,this shows that the monsoon climate had been formed in East China in Mid-Pleistocene.And the climate during pleistocene period in North China roughly corresponds to the present climate in the Huaiho River basin,and sometimes corresponds to the warm temperate zone climate in the Yangtze River basin. The general tendency of the climate change during Mid-Pleistocene was changing from semi-humid warm temperate climate to semi-arid temperate climate. There is not arty trace of glaciation to be found from the analytical results of all sediment samples collecting from the whole stratigraphy section in the cave of “Peking Man”.