本文讨论的Pb-Pb法和Rb-Sr法全岩同位素资料用于解决苏格兰西北部刘易斯杂岩中一些由广泛野外研究所产生的争论和问题。本节有关太古宙地壳演化中新地壳生长对先前存在的地壳“再造”的相对重要性,也在此一并提出。刘易斯杂岩是一个曾遭到两次主要构造—热力事件的前寒武纪片麻岩岩层;一次是含较年轻“腊克斯福特(Laxfordian)”闪岩相事件的更老“斯考利(scourian)”辉石 The Pb-Pb and Rb-Sr isotopic data discussed in this paper are used to address some of the controversies and problems arising from extensive field studies in the Lewisian complex in northwestern Scotland. The relative importance of this new crustal growth to the pre-existing crustal “reengineering” in the Archean crustal evolution is also presented here. The Lewis Complex is a Precambrian gneiss rock that once suffered two major tectono-thermal events; one is the older, Skagley, which contains the younger “amphibolite facies” from Laxfordian (scourian) "pyroxene