Tectonics of the Aracuai/Ribeira Orogenic Tongue of Southeastern Brazil, and its Significance for the Paleo- and Neoproterozoic Assembly of West Gondwana

9902730马歇尔板块构造理论与地球表面周围大陆地壳的重大历史重组是一致的，包括偶尔的次大陆组装，包括大部分大陆地壳在一个大的陆块中。 最近的证据表明，新元古代全球板块组装导致了普遍接受的一个重大重组的陆块，但几何形状，时间和机制的组装是有争议的。 该项目旨在提供西冈瓦纳超大陆中心地区的地壳形成和组装数据，该地区现位于巴西西南部。 这一结构和年龄测定研究的结果，预计将解决几个关键问题，新元古代构造，将是相当大的效用，在了解地壳集团和超大陆组装。

9902730MarshakPlate tectonics theory is compatible with major historic rearrangements of the continental crust around the surface of the earth, including occasional subcontinental assembly that includes most of the continental crust in one large landmass. Recent evidence for a neoproterozoic global plate assembly has led to general acceptance of a major reorganization of land masses, but the geometry, timing, and mechanism of assembly are controversial. This project is designed to provide crustal formulation and assembly data from an area at the heart of the West Gondwana supercontinent, now located in southwestern Brazil. Results of this structural and age-dating study are expected to resolve several key issues concerning neoproterozoic tectonism that will be of considerable utility in understanding crustal groups and supercontinental assembly.