Distribution and Isotopic Character of Archean Basement within the Early Proterozoic Trans-Hudson Orogen, Saskatchewan: Implications for Tectonic Interpretation

9418367比克福德 坦斯-哈德逊造山带是地球上保存最广泛的早元古代造山带，从美国中北部延伸到格陵兰岛。 它与1.a-1.8Ga的Penokean和Wopmay造山带同时代，并且在两个并列的板块--东南部的太古宙上级克拉通和西北部的太古宙Hearne和Rae省--之间保存了主要是幼年弧岩和后来的岩体的拼贴画方面是独一无二的。 加拿大Lithoprobe反射地震剖面横跨造山带，揭示了上级和Rae/Hearne碰撞的复杂历史，然而碰撞造山作用的性质和运动学在很大程度上是不受约束的。 该计划将利用几种同位素体系的显著差异来区分和对比这些碎片和它们的碎片，并利用空间分布来推断碰撞的构造样式和运动学。 研究结果不仅有助于加深对该造山带的认识，而且有助于重建劳伦提斯早期的组合。

9418367 Bickford The Tans-Hudson orogen is the most extensively preserved Early Proterozoic Orogenic belt on earth extending from north-central US to Greenland. It is coeval with the 1.a-1.8Ga Penokean and Wopmay orogens and is unique in preserving a collage of mainly juvenile arc rocks and later plutons between the two juxtaposed terranes- the Archean Superior craton ont he southeast and the Archean Hearne and Rae provinces on the northwest. The Canadian Lithoprobe reflection seismic section across the orogen has revealed a complex history of the collision of the Superior and Rae/Hearne cratons, however the nature and kinematics of the collisional orogensis is largely unconstrained. This program will utilize distinctive differences in several isotopic system to differentiate an correlate these terranes and their fragments and to use the spatial distributions to infer tectonic style and kinematics of the collision. Results will not only improve understanding of this orogen, but help reconstruct early assembly of Laurentia.