最近几年,在世界上一部分太古代地质学家纷纷转向元古代地质研究的同时,另一部分地质学家仍在锲而不舍地钻研太古代地质问题。在所有的太古代地质难题中,争议最大的问题之一是绿岩带赖以形成的基底存在与否及其性质。提出该问题的原因是,世界上几乎所有的绿岩带都被后来的、大量的、多期次的花岗岩(以TTG质花岗岩为主)侵入穿切和包 In recent years, while part of the world’s Archean geologists have turned to Proterozoic geology studies, other geologists are still persistently studying Archean geological problems. Among all the archeological problems in the Archeology, one of the most controversial issues is the existence and nature of the basement upon which the Green Belt was formed. The reason for this problem is that almost all of the greenstone belts in the world are invaded by cuttings and parcels of later, large-scale and multi-stage granites (mainly TTG granites)