摘要
本文应用孢粉分析对富蕴水磨沟探槽的地层年代和古环境进行了探讨,认为富蕴地区在新冰期第一期活动中气候干净,为寒冻荒漠植被;在大西洋期为暖干气候,生长了草原化荒漠植被;在其后的新冰期活动中为冷湿气候,发育了灌丛草原植被。结合新疆特殊的地理条件,将上述环境演变过程与国内外全新世气候波动研究结果相比较,并参考有关(14)~C数据,作者认为该探槽中发现的第一次古地震活动应晚于6000a,B.P,第二次古地震活动似应发生于2500a,B.P之后。
The seismologic trench in Shuimuo Valley of Fuyun is situated at the southwest foot of Artay Mountain, Xinjiang. Many pollen and sporo grains of herb, shrub and other plants have been found in the sediments from this trench. On the basis of the results obtained, it is believed that the climate in Fuyun was dry and cold in the New Ice-age I, the flora was cold desert then. Dry and warm climate was appeared in the Climatic Optimum of Holocene, and the surface was covered by grassed desert. The following New Ice-age activity brought about cool-wet climate, and the shrub-grassland developed there.Compared the environmental evolution process with the international research results on paleo-cli-mate fluctuation in Holocene, consulted 14C dating of some layers, the author considered that the first paleo-seismic traces, which was found in the trench, was formed later than 6000 a,B. P, the secondones later than 2500 a, B. P.
出处
《内陆地震》
1992年第4期388-393,共6页
Inland Earthquake
关键词
富蕴
探槽
孢粉分析
古环境
古地震
Fuyun Paleo-seism Trench section Sporo-pollen Paleo-environment
