| 摘要: |
| 近年在羊湖地区全新世沉积物中采获了大量的孢粉化石,依据孢粉的种类、含量变化及年龄值划分了孢粉组合带,建立了孢粉组合序列,识别出3个气候变化旋回,初步分析了该地区1.3万年以来的古气候变化规律,具有环境研究意义。 |
| 关键词: 孢粉组合 古气候 1.3万年 羊湖 藏北 |
| DOI： |
| 附件 |
| 投稿时间：2004-03-15 |
| 基金项目:1∶25万奥依亚依拉克幅、羊湖幅区域地质调查项目(19991300009071)。 |
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| The palaeoclimatic changes since 13 ka as revealed by sporopollen assemblages in the Yanghu region,northern Xizang |
| HUANG Yong, MOU Shi-yong, HE Yong-zhong, ZHU Xun, CHEN Ren |
| (Guizhou Institute of Geological Survey, Guiyang 550005, Guizhou, China) |
| Abstract: |
| Numerous sporopollen fossils have been taken in recent years from the Holocene sediments in the Yanghu region,northern Xizang. The assemblage zones and sequences of the sporopollen assemblages are established on the basis of the types,contents and ages. The assemblage zones include from the base upwards:(1) Ephedra-Quercus-Chenopodiaceae Artemisia (Zone Ⅰ),(2) Ephedra-Chenopodiaceae Artemisia (Zone Ⅱ),(3) Betulaceae-Quercus-Chenopodiaceae (Zone Ⅲ),and (4) Ephedra-Chenopodiaceae Artemisia (Zone Ⅳ) zones in the ZK1 borehole section,and (1) Chenopodiaceae (Zone Ⅰ),(2) Betulaceae-Quercus-Chenopodiaceae (Zone Ⅱ),and (3) Ephedra-Chenopodiaceae Artemisia (Zone Ⅲ) zones in the IP16 section. Three cycles of palaeoclimatic changes are also recognized. The palaeoclimatic changes indicated by these cycles are believed to be of important environmental significance. |
| Key words: sporopollen assemblage palaeoclimate 13 ka Yanghu Lake northern Xizang |
