摘要
对中国东部新生代玄武岩及其包体的Ｓｒ Ｎｄ 同位素资料的总结表明，中国东部现今岩石圈地幔具有强烈亏损性质，现今岩石圈地幔是新生的。岩石圈减薄主要发生在中生代晚期，并与中国东部大面积、强烈的中生代岩浆活动在时间上相对应，且具有自西向东岩石圈减薄逐渐增强的趋势。分析表明，中生代期间印度洋型软流圈地幔的侵入与中国东部的岩石圈减薄密切相关。
The comprehensive summary about the SrNd isotopic features of Cenozoic basalt and their mantle xenoliths indicates the present lithospheric mantle in Eastern China is intensively depleted and newly formed. The lithospheric thinning, most took place in Late Mesozoic, which was corresponded to the same age of large areal and intensive igneous activities in this area,became stronger from west to east in intensity.The detail analysis suggests this kind of lithospheric thinning is closely related to the diffusion of Indiantype asthenosphere in Mesozoic.
出处
《长春科技大学学报》
CSCD
1999年第4期313-318,共6页
Journal of Changchun University of Science and Technology
基金
国家自然科学基金
国土资源部"九五"重点科技攻关项目
