早前寒武纪克拉通内的叠瓦拼贴构造

从早期地幔热对流的动力学特点出发,针对早前寒武纪克拉通内的一些有争议的问题进行了解释;认为不少绿岩地块或地体之间,绿岩与花岗片麻岩之间并非是因垂直运动造成的原地不整合接触,而是因大规模水平运动产生的叠瓦拼贴,这一思想将会帮助我们重新认识克拉通区早前寒武纪地壳演化,并进一步指导填图和地层划分以及找矿工作。

IMBRICATED AMALGAMATION TECTONICS IN EARLY PRECAMBRIAN CRATONS

The paper has satisfactorily shed tome light on a few unresolved problems in early precambrian cratons in view of dynamical characteristics of heat convection regime in early mantle. It is concluded that unconformities,which resulted from vertical movement, didnot predominate between greenstone terranes or greenstone terrane and gneissic basement,but imbricated amalgamation structures,which originated from large-scale horizonetal movement, were pervasive to collage them, the above conclusion is much conductive to our reevaluation of early precambrian evolution and helpful to mapping, stratigraphic reclassification and mineral exploration in most cratons.