Origin and Evolution of the Cadomia Terrane: Systematic Characterization of Basement

在过去，板块构造学的一个主要问题是确定大陆块体的位置，但是随着时代的增加，这些板块重建变得越来越不同，直到前寒武纪，巨大的不确定性导致了重大的争议。这个问题的部分原因是由于缺乏对单个地壳块体均匀身份的认识。该项目包括对法国北部的前寒武纪岩石进行系统的地球化学分析，以确定它们与环大西洋地区其他地壳块体的关系。收集的化学成分、同位素和年龄信息将用于测试几种可能的岩石相关性，从而更好地了解前寒武纪构造。

9614620 Samson A major problem in plate tectonics is defining the positions of continental blocks in the past, but these plate reconstructions become increasingly different with increase in age, until the Precambrian, where the large uncertainties lead to major controversies. Part of the problem stems from the lack of knowledge of the even identity of individual crustal blocks. The project involved the systematic geochemical analysis of Precambrian rocks in northern France to determine their relationship to other crustal blocks in the circum Atlantic region. The chemical compositional, isotopic, and age information to be collected will be used to test several possible correlations of the rocks which will in turn lead to a better understand of Precambrian tectonics.