研究澳大利亚地台在太古代以后的地质发展历史,对于分析古构造及贡瓦纳次大陆的演化有着重要意义,因为在元古代(即26—17亿年,在里菲前),在澳大利亚及其它贡瓦纳大陆首次广泛出现了地台及地槽型杂岩。因而与显生代一样可以确定出不同的构造单元,后者证明澳大利亚的广大地区,在元古代开始阶段就已存在成熟的大陆壳,并开始发育有地台和后克拉通构造[地台内部地堑及冒地槽]类型,而在澳大利亚地台东部地区大陆壳或者没有完全形成,或者遭受了破坏。这 Studying the geological development history of the Australian platform after the Archean period is of great importance to the analysis of palaeostructure and the evolution of the Gongwana sub-continent because in the Proterozoic (ie, between 2.6 and 1.7 billion years ago at Lefiye), in Australia and others For the first time in the mainland of tribundas, platforms and trough-type complexes have emerged. Thus, as with the Paleozoic, different tectonic units can be identified, the latter proving that in Australia the mature continental crust already exists at the beginning of the Proterozoic and that the development of terraces and post-craton structures [within the platform Graben and sands], whereas the continental crust in the eastern part of the Australian platform was either incompletely formed or damaged. This