摘要
通过对弧后盆地大地构造体制的讨论，作者认为其属活化作用的产物。根据地质、地球物理、地球化学等资料的分析，作者得出结论认为，由于东亚岛弧系岩石圈的均衡作用及海沟外侧冷却大洋岩石圈块体的下沉拖曳牵引等作用，使软流圈在岛弧系下方发生分异，这种分异作用带动东亚陆缘向东扩张，从而产生弧后的张开。文中还对其它模式做了概略的讨论。最后，作者将弧后盆地分为五个演化阶段，并对各阶段特征做了简述。
According to discussions on the geotectonic regime of back-are basins,the authorsthink that back-arc basins resulted from reactivation,By means of analyses of geology,geophysics,geochemistry and so on,we have come to a conclusion that because there ex-ists isostasy of lithosphere in the arcs and settling and pulling of slabs in the trenches,asthenospheres enter into differentiation,and the differentiation results in spreading inthe continental margins,for example,in East Asia. The spreading in the continental mar-gins is the basic reason that leads to the formation of the back-arc basins. Other modelshave also been discussed simply. Finally,we divided the evolution of the back-arc basinsinto five stages and meanwhile discussed the characteristics of each stage.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
1996年第4期63-69,共7页
Marine Geology & Quaternary Geology
基金
国家自然科学基金
关键词
东亚
弧合盆地
软流圈分异
陆缘扩张
形成
演化
East Asia back-arc basins differentiation of asthenospherespreading in continental margins
