COLLABORATIVE RESEARCH: Geochronologic and Geologic Framework of Western Amazonia and Its Bearing on Possible Reconstructions with Laurentia-Baltica

在整个超大陆旋回中，主要板块的构造和位置是一个长期目标，前寒武纪研究在其中起着很大的作用。然而，许多前寒武纪克拉通的资料不完整，需要对这些克拉通的潜在相关造山带、火成岩和沉积省以及构造进行研究，以验证重建和建立模型，南美洲亚马逊河流域是中元古代晚期的关键克拉通，可能与劳伦提亚-波罗的海超大陆以及随后的大陆破碎后的一系列大陆碎片有关。这项工作将涉及与巴西地质学家合作对若干地区进行地质年代学、地球化学和实地调查。研究结果将有助于分析超大陆旋回，并增加对亚马逊克拉通在劳伦蒂亚-波罗的海超大陆中所起作用的认识。

9705758 Condie The configuration and location of major plates throughout supercontinent cycles is a long-term goal in which precambrian research plays a large part. However, there are incomplete data for many Precambrian Cratons, and studies of potentially correlative orogenic belts, igneous and sedimentary provinces and structures in these cratons is needed to test reconstructions and to develop models Amazonia in South America is a key craton for late mesoproterozoic time, which may involve possible connections with the Laurentia-Baltica supercontinent, and the subsequent array of continental fragments after breakup. This work will involve geochronologic, geochemical and field investigations of several areas in cooperation with Brazilian geologists. Results are expected to facilitate analysis of supercontinent cycles and increase knowledge of the role played by the Amazon craton in the Laurentia-Baltica supercontinent.