The location of the West African craton (WAC) has been poorly constrained in the Paleoproterozoic–Mesoproterozoic supercontinent Nuna (also known as Columbia). Previous Nuna reconstruction models suggested that the WAC was connected to Amazonia in a way similar to their relative position in Gondwana. By an integrated paleomagnetic and geochronological study of the Proterozoic mafic dikes in the Anti-Atlas Belt, Morocco, we provide two reliable paleomagnetic poles to test this connection. Incorporating our new poles with quality-filtered poles from the neighboring cratons of the WAC, we propose an inverted WAC-Amazonia connection, with the northern WAC attached to northeastern Amazonia, as well as a refined configuration of Nuna. Global large igneous province records also conform to our new reconstruction. The inverted WAC-Amazonia connection suggests a substantial change in their relative orientation from Nuna to Gondwana, providing an additional example of large-magnitude cumulative azimuthal rotations between adjacent continental blocks over supercontinental cycles.

中文翻译：

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重新定位古元古代-中元古代努纳超大陆的西非克拉通

西非克拉通 (WAC) 的位置在古元古代-中元古代努纳超大陆（也称为哥伦比亚）中受到的限制很差。之前的 Nuna 重建模型表明，WAC 与亚马逊河的连接方式类似于它们在冈瓦纳的相对位置。通过对摩洛哥反阿特拉斯带中元古代基性岩脉的综合古地磁和地质年代学研究，我们提供了两个可靠的古地磁极来测试这种联系。将我们的新极点与来自 WAC 邻近克拉通的优质过滤极点相结合，我们提出了一个倒置的 WAC-亚马逊连接，北部 WAC 连接到亚马逊东北部，以及 Nuna 的精细配置。全球火成岩大省记录也符合我们新的重建。