摘要
Ｓｍ－Ｎｄ同位素研究结果显示，华北地台太古宙构造体制与地壳生长可分为二个发展阶段：２８００Ｍａ以前，地壳以幔源物质垂向增生为主；进入２８００Ｍａ以后，地壳物质开始进入地幔，并以水平运动为主要构造体制，反映板块构造机制在太古宙晚期地质演化中具有十分重要的作用。
The Sm-Nd isotopic results indicate that the Archean tectonic regimeand crust growth in Northern China Platform can be divided into two stages.Before 2800Ma, the crust was grown through vertical accretion of mantle material,but after that,the crust materials were started to be added to mantle under horizonal tectonic regime. This guggests that the plate tectomis plays an important rode in the later Archeangeological evolution.
基金
国家自然科学基金
