COLLABORATIVE RESEARCH: Timing and Correlation of Tectonic Events in Grenville-Age Province, Trans-Pecos Texas

小行星9316945 格伦维尔省是北美最年轻的前寒武纪省，面积很大，但沿着大西洋海岸裸露，并延伸到德克萨斯州和墨西哥。 本建议书将调查德克萨斯州范霍恩附近的一个关键出露区域，该区域之前的工作表明，从构造腹地的较低角闪岩品位上地壳岩石到原始未变质沉积岩存在渐变。这项工作将涉及广泛的年代测定，以限制现有地质框架内的变形事件，并将制定该地区格伦维尔火山岩演化的模型。 结果将适用于1.5-1.35Ga的“非造山”花岗岩流纹岩省的美国中部的代和晚元古代北美南部和邻近大陆之间的连接的假设。

9316945 Bickford The Grenville province is the youngest precambrian province in North America and is extensive but variably exposed along the Atlantic coast and extends into Texas and Mexico. This proposal will investigate a key area of exposure near Van Horn Texas where prior work has shown a gradation from lower amphibolite grade upper crustal rocks in the tectonic hinterland to pristine unmetamorphosed sedimentary rocks. The work will involve extensive age dating to constrain deformational events within the existing geologic framework and will develop models for the evolution of the Grenville terrane in this area. Results will apply to the generation of the 1.5-1.35Ga "Anorogenic" granite-rhyolite province of the central United States and to hypotheses of a late proterozoic connection between Southern North America and adjacent continents.