摘要
实地考察研究了中国黄土分布区及其它地区上新世末期以来的各种地质事件，用多种测年法和古土壤断代法确定了黄土、水系、沉积、侵蚀、火山、断裂等气候和构造事件的发生年代，指出第四纪事件具有一种准周期为０．４Ｍａ的同步群发性，提出了一种描述地球内外地质动力全球性变化的“气候－构造旋回”模式。
During the Quaternary there occurred swarms of events in North, South, West and East China, as well as in other continents. During the initial stage of terrace formation, i.e.,when the climate was very cold in accompaniment of the development of thick sandy loess and glaciers, Neotectonics, volcanism and erosion were higlily active. The Quaternary events may be divided into seven stages including the global paleoclimate, paleohydrology, paleo-erosion, paleovolcanism and Neotectonics,which share much in common with respect to their age and periodicity. The quasiperiod is about 0.4Ma. Based on this some hypotheses are presented, i. e., “the Neotectonic activation is usually accompanied by drastic changes in climate” and “under the unified control of the planetary movement of the earth, the climatic-tectonic cycles and the swarms of events have a quasi-period of about 0.4Ma”. There have been recognized 8 climatic-tectonic cycles since the Late Pliocene, whose ages are 3.00-2.48, 2.48-2.07, 2.07-1.67, 1.67-1.26, 1.26-0.85, 0.85-0.47, 0.47-0.10 and 0.10-0Ma B.P. The synchronical cycles may be controlled by the movement (orbit and rotation) of the earth. This is a new model of global changes,which is applicable to international correlation.
出处
《地球化学》
CAS
CSCD
北大核心
1994年第1期69-79,共11页
Geochimica
基金
国家基金
中国科学院黄土资助
第四纪地质开放研究实验室资助
关键词
准周期
事件群发性
气候
构造旋回
Ma quasi-period
swarms of events
climatic-tectonic cycles
global change
