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

9316945格伦维尔省的比克福德是北美最年轻的前寒武纪省份，沿大西洋海岸分布广泛，但暴露程度不同，并延伸到德克萨斯州和墨西哥。这项提案将调查德克萨斯州范霍恩附近的一个关键暴露区域，此前的研究表明，该区域从构造腹地较低的角闪岩等级的上地壳岩石到原始的未变质沉积岩。这项工作将涉及广泛的年龄测定，以将变形事件限制在现有的地质框架内，并将开发该地区格伦维尔地体的演化模型。这些结果将适用于美国中部1.5-1.35Ga“非造山”花岗岩-流纹岩省的形成，以及关于北美南部与邻近大陆之间存在晚元古代联系的假说。

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.