湖北黄岗晚更新世孢粉动态组合的统计分析及古气候性质  

THE STATISTICAL ANALYSIS OF SPORO-POLLEN ASSOCIA-TION AND PALAEOCLIMATE NATURE OF LATE PLEISTOCENE IN HUANGGANG, HUBEI

作　　者：田明中[1] 曹伯勋[1] 

机构地区：[1]中国地质大学地质系

出　　处：《地球科学（中国地质大学学报）》1990年第5期505-513,共9页Earth Science-Journal of China University of Geosciences

摘　　要：本文对湖北黄岗龙王山晚更新世沉积物进行了系统的孢粉分析。选取能反映环境标志的几种变量用聚类分析方法进行了孢粉组合的划分并用相似系数值来检核孢粉动态组合的规律。研究表明,组合的中间层上下相似植被的cosθ值在0.92～0.99,从而揭示出第四纪孢粉组合变化的内在规律,指出本区晚更新世的古气候特征是由暖向冷变化的降温期,而不是完整的冷(或暖)气候旋回。There isn't information about sporo-pollen until now in the Middle Yangtze River area.The authors have made a systematic sporo-pollen analysis in sediments of Late Pleistocene in Longwangshan of Huanggang, Hubei. The some variables representing marks of environments were processed by the cluster analysis. The eight associations from the bottom up to the top are as follows: 1. Quercus-Ul-mus; 2. Pinus-Ephedra-Myrica-; 3. UIrnus-Gramineae; 4. Qaercus-Cupressaceae; 5. Quercus-Compositae; 6. Quercus-UImus; 7. Pinas-Taxodiaceae-Compositae-Polypodiaceae; 8. Quercas-Salix-Cupressaceae. The rules of sporo-pollen associ-ations were tested by the similarity coefficient. From the above analysis is drawn a conclusion that the cos0 values of the similar vegetations of the above and be-low of the middle bed range from 0.92 to 0.99, which has revealed the rule of changes in Quaternary sporo-pollen association, and indicated that the climate changed from warm to cool in paleoclimate in Late Pleistocene in this area instead of a complete cool or warm cycle.

关 键 词：晚更新世 孢粉 组合 聚类分析 

分 类 号：Q914.81[天文地球—古生物学与地层学]