Tectonic evolution of core zones of orogenic belts - Canadian cordillera and Grenville province

请求提供资金，以支持对碰撞山区核心地带中地壳岩石的构造演化进行实地研究，并支付U-Pb地质年代学（年龄和热历史）实验室研究和研究生支助的相关费用。 研究是合作的，包括对地质学，地质年代学，研究计划设计，成果交流和专业发展的学生的培训和指导做出了重大贡献。 研究限制：（一）中地壳分布应变的几何形状、时间和作用，以及韧性逆冲和伸展剪切带系统;（二）岩石熔融、花岗岩产生和变形之间的关系;（三）Lithoprobe地球物理数据与地表岩石直接相关的意义;（四）用于确定地质事件日期的地质年代学数据复杂的原因。目的是描述中地壳如何响应和促进造山和崩塌，什么过程是有效的，以及核心区变形如何与造山带的其他部分相关。 Cordillance研究特别富有成果，因为所选的野外区域非常暴露，我们利用并建立了极好的地质和地球物理框架。 研究结果对认识造山带本身的演化和解释Lithoprobe地球物理资料具有重要意义。 我们正在更复杂的“面向过程”的问题上取得进展：i）地质年代学，对年龄数据的一般解释有影响，ii）结构地质学和构造学，对理解山脉带和更古老的前寒武纪地质省有影响。 这项研究的预期成果是重新解释的意义和时间的结构和岩石中的热历史，修订的几何和构造模型为加拿大科迪勒支和西部格伦维尔，完善的理解的建设和崩溃的山区带和指导学生。 研究成果对世界各地从事构造问题研究的地质学家和地质年代学家、科迪勒堡和格伦维尔地质学家、区域地质调查野外填图者和矿产勘探地质学家都有意义。

Funds are requested to support field-based research on the tectonic evolution of mid-crustal rocks in core zones of collisional mountain belts, and related costs for U-Pb geochronology (age and thermal history) laboratory studies and graduate student support.  Research is collaborative and includes a significant contribution to the training and mentoring of students in geology, geochronology, research program design, communication of results and professional development.  Research constrains: i) the geometry, timing and role of distributed strain, and ductile thrust and extensional shear zone systems, in the mid-crust; ii) the relationships between melting in rocks, granite production and deformation; iii) the significance of Lithoprobe geophysical data by direct correlation with rocks at the surface; and iv) reasons for the complexities of geochronology data used to date geological events. The aim is to characterize how the mid-crust responded to and facilitated mountain building and collapse, what processes were operative, and how core-zone deformation relates to the rest of the orogen.  Cordilleran research is particularly fruitful because the chosen field areas are very well exposed, and we utilize and build on a superb geological and geophysical framework.  The results are important in understanding the evolution of the mountain belt itself, and for interpretation of Lithoprobe geophysical data.  We are making progress on more sophisticated "process-oriented" problems in: i) geochronology, with implications for how age data are generally interpreted, and ii) structural geology and tectonics, with implications for understanding mountain belts and older Precambrian geologic provinces.  The anticipated outcomes of this research are reinterpretation of the significance and timing of structures and thermal history in rocks, revised geometric and tectonic models for the Canadian Cordilleran and western Grenville, refined understanding of the construction and collapse of mountain belts and mentoring students.  The research results are of interest to geologists and geochronologists working on tectonic problems worldwide, Cordilleran and Grenville geologists, field mappers in regional geological surveys and mineral exploration geologists.