早更新世末中更新世早期的环境事件与灾变  

Environmental events and catastrophes from the end of early pleistocene to the early stage of middle pleistocene

作　　者：周厚云[1] 

机构地区：[1]中国科学院广州地球化学研究所,广东广州510640

出　　处：《自然灾害学报》2000年第2期123-129,共7页Journal of Natural Disasters

基　　金：国家自然科学青年基金!49702031;广东省自然科学基金;广东省科技攻关项目

摘　　要：综述了发生在早更新世末到中更新世早期，即大致从1.1～0．7MaBP的各种环境事件，包括气候异常变化、构造活化、侵蚀沉积事件、天文事件、生物迁徙以及古地磁的异常等。其中气候异常和构造活化是基本的环境事件，对其它事件有控制作用。根据气候异常和构造活化的特征，可以认为，从1.1MaBP到0.7MaBP是一个连续的环境异常过程．这一时期各类环境事件集中发生，坏境事件或为灾变的原因，或为灾变的结果。In this paper, the author descfibes several kinds of environmental events (includingabnormal changes of climate, tectonic activation, erosion and deposition events, astronomicalevents, migrations of creature and some other events such as the reversal of paleo -magneticpo1ar) from the end of Early Pleistocene to the early stage of Middle Pleistocene, approximately1.1- 0.7MaB.P.. Abnormal changes of climate and tectonic activation are the essential forsome other environmental events, such as erosion, deposition events and migrations ofcreature, and contro1 these events. There are two clusters of impact events which are supposedto happen at about 1.1 Ma B.P. and 0.7Ma B.P. respectively and the paleo - magnetic polarreverse three times duril1g the time of 1.1 ~0.7 Ma B.P.. Based on the characteristics of abnor-mal changes of climate and tectonic activation, the author combines these events together andregards the whole period from 1.1 to 0.7 Ma B.P. as a continuous procession full of abnor-lnal environmental events. Some environmental events are the causes of catastrophes, and someare the results. There are close relationships between environmental events and naturalcatastrophes.

关 键 词：环境事件 灾变 早更新世 中更新世 古气候 

分 类 号：P534.631[天文地球—第四纪地质学] P532[天文地球—古生物学与地层学]