摘要
本文首先评述了俯冲作用的研究现状,着重讨论俯冲增生、俯冲浸蚀及其地质意义。作者从比较俯冲学出发,提出俯冲作用在在着旋回性,认为智利型俯冲带与马里亚纳型俯冲带的相互转化造成了张压交替的构造旋回。地质时期地槽的多旋回发展受到俯冲作用旋回的控制。俯冲板片倾角、俯冲速率的变化影响到上覆板块的构造应力场,中国地区构造应力场的演变与中国周缘俯冲型式的变更有关。
This paper discusses the present situation of the study of subduction, and places emphasis on the subduction accretion, erosion and its geological significance. A cyclicity in the subduction is put foreward on the basis of the comparative subductology. It is believed that the alternation of the Chilean-type subduction zones with Mariana-type subduction zones may build up a tectonic cycle in which compressive action alternates with extensive one. The polycyclic development of geosynclinal belts is controlled by the cyclicity of subduction during e geological time. The changes in the dip of descending slab and in the rate of subduction have an influence on tectonic stress fields of an overriding plate. The evolution of tectonic stress fields in China areas is related to the alternation of the subduction types around China.
出处
《海洋通报》
CAS
CSCD
北大核心
1990年第2期77-83,共7页
Marine Science Bulletin
