Extensional Strain Rates in the Basin and Range Province

盆山伸展构造一直是众多地质和地球物理研究的重点，但在伸展作用与岩浆作用的关系、伸展速度等方面仍存在一些重大问题。这项研究将对内华达州中东部、西部和亚利桑那州西部的同拉张火山岩和变质岩进行40Ar/39Ar测年。结果将解决应变率的问题，以及跨域的伸展是同步的还是历时的，以及岩浆作用是否与伸展同时发生。

Basin and range extensional tectonics has been the focus of considerable geological and geophysical investigation, however, there are several major problems remaining such as the relation- ship between extension and magmatism and the rate of extension. This study will involve 40 Ar/39 Ar dating of synextensional volcanic rocks and metamorphic rocks from east-central and western Nevada and western Arizona. Results will address the question of strain rates and whether extension was synchronous or diachronous across domains and if magmatism was concurrent with extension.