青海唐古拉地区晚更新世湖相沉积特征、古植被及17.4kaB.P.以来气候转型期的厘定

Late Pleistocene epoch lake facies sedimentary characteristics, paleoplant-cover and definition of climate transformation since 17.4 ka B.P.Tanggula area, Qinghai

摘要: 通过年代学研究、沉积特征与配套的植物学分析,确定出唐古拉地区晚更新世以来的古植被演化的3个阶段,相应的古气候经历了干寒-湿润-干寒旋回性的演变过程。同时,从晚更新世湖相沉积物中厘定出风成—水成的气候转型事件,大致发生在17.4kaB.P(TL),而植被特征也出现了从草本、木本发育为主转变为以草本占绝对优势的阶段,并于17.4kaB.P(TL)后风成堆积物中出现植物花粉的低峰带。
- 唐古拉地区 /
- 晚更新世 /
- 古植被 /
- 气候转型
Abstract: According to chronology research, sedimentary characteristics and interrelated botany analysis. It can make sure that three stages of paleo-plant cover evolve since Late Pleistocene epoch over Tanggula area, the paleoclimate had gone throngh the cyclical develop procress of dryness,cold-moist-dryness,cold.Meanwhile,the climate transformation event of wind-water had been defined from the Late Pleistocene epoch lake facies sediment, which occurred about 17.4 ka B.P.(TL).Corresponding plant cover characteristics also changed the stages from the main part of herbaceous-woody plant to the absolute advantage of herbaceous plant and low sporo-pollen zone appeared in the eolian deposite after 17.4 ka B.P.(TL).
- Tanggula area /
- Late Pleistocene epoch /
- paleo-plant cover /
- climate transformation