云南腾冲盆地晚更新世孢粉组合及古植被、古气候和古环境演化  

LATE PLEISTOCENE SPOROPOLLEN ASSEMBLAGESAND EVOLUTION OF PALAEOVEGETATION, PAL-AEOCLIMATE AND PALAEOENVIRONMENTS INTENGCHONG BASIN, WESTERN YUNNAN

作　　者：秦勇[1] 费安玮 金奎励[3] 韩德馨[3] 金晓珏 

机构地区：[1]中国矿业大学地质系 [2]中国石油大学地质系 [3]中国矿业大学北京研究生部 [4]云南省煤炭科学研究所

出　　处：《海洋地质与第四纪地质》1992年第1期109-118,共10页Marine Geology & Quaternary Geology

摘　　要：根据69个钻孔样品的孢粉及9个硅藻分析,讨论了滇西腾冲盆地晚更新世植被、气候及环境的变迁。在研究区可划分出四个孢粉优势带和三个硅藻优势带,此盆地晚更新世古环境经历了三个演化阶段,不仅与新构造运动有关,而古气候对古植被和古环境起到控制作用。According to the sporopollen assemblages of 69 drilling core samples and combining with the data of diatom and peat plant remains, the authors discussed the evolution of the Late Pleistocene palaeo-vegetation,-climate and -environments in the Tengchong Basin, western Yunnan. Four sporopollen assembly zones and three diatom assembly zones were distinguished in the studied sedimentary section that is about 100 meters in thickness and tells an alternate palaeoclimatic variation of cool/humid-temperate/dry-cool/humid. The trend of Late Pleistocene climate evolution in the studied area showed no difference from that in other areas of the world, but there was a particular corresponding relation of Glacial/Pluvial Periods and Intergla-cial/ Interpluvial Periods in Tengchong. Corresponding with the palaeoclimatic variation, the palaeoenvironments underwent three evolving stages: (1) deep lake with slowly flowing and poorly untritious water body; (2) shallow lake with rather fast flowing and neutral or weakly alkaline water body; (3) shallow lake-marsh/swamp with weakly acidic medium and rich nutrients. The evolution that the lake was progressingly filled up, became shallow and then marshy or swampy, was not only related to the neotectonics, but also implied the control of the palaeoclimate on apalaeovegetation and palaeoenvironments.

关 键 词：孢粉组合 古植被 云南 晚更新世 

分 类 号：Q914.663.1[天文地球—古生物学与地层学]