摘要
本文根据孢粉分析,推测古石灰华沉积时期的植被,是以蒿、藜为主的山地草原,散布有柳、栎、榆、桦等组成的落叶阔叶林块;古气候比现今温暖湿润,年平均气温约10—13℃,属暖温带半干旱气候,当时的海拔高度约1500—2000m。
In 1988, some plant-bearing calcic sinter were discovered and collected by the team of Scientific Expedition of Chinese Academy of Sciences to the Karakulun-Kunlun Mts. at 4600m. on the northern slope of middle Kunlun Mts. Its age is estimated to be from late Pliocene to early Pleistocene.
Sporo-pollen assemblage of the plant-bearing calcic sinter is dominanted by angiospermous pollen (91.4%). Arboreal and shrubs pollen occupies 23.2% in the total pollen. Broad-leaf trees' pollen are mainly Salix, Ulmus> Quercus and Betula. Herbaceous pollen occupies 75.4%y in which Artemisia and Chenopodiaceae are abundant and Xerophyte pollens occupy a high percentages. Sporo-pollen analysis data support that the age of the plant-bearing calcic sitner is from middle-late Pliocene to early Pleistocene. In that time Paleovegetation was mainly represented by mountain steppe (Artemisia, Chenopodiaceae....) mixed with deciduous broad-
Itaf forest (Salix, Quercus, Ulmus, Berula ...... in a warm and semidry climatic condition. Art
annual mean temperature is estimated about 10?13?C. Altitude of the place where plant-bearing calcic sinter grew at that time was probably 1 500-2 000 m.
出处
《地理学报》
EI
CSSCI
CSCD
北大核心
1991年第3期347-352,T002,共7页
Acta Geographica Sinica
基金
国家自然科学基金中国科学院重大项目成果之一。
关键词
化石
含植物
石灰华
孢粉
古环境
plant-bearing calcic sinter, sporo-pollen, paleo-environment.
