Active Tectonics of Diffuse Intracontinental Deformation

小行星9725766 目前还不清楚，如果陆内板块边界，通常表示为广泛的扩散变形区，表现为一个系统的微板块，或作为一个连续体。 大盆地是一个典型的例子，一个地区，以这种方式行事。 为了确定今天观察到的应变模式是否反映了微板块的趋势，建立了一个18站的全球定位系统网络，并已运行了一年。 该奖项提供了额外的三年资金，以完成总共四年的监测网络。 在此之后，速率不确定性将足以区分微孔板和连续体行为。 要解决的基本科学问题将是更好地理解大陆内板块边界。 这种理解是一个基本的概念，以增加我们的知识板块构造。 此外，这些地区的地震危险性可以进一步量化。 为此，重要的是要知道板内应变是否局限于地震带内，或者地震活动是否长期迁移穿过相对均匀的应变积累的宽区域。 为了解决这个问题，主要研究员正在使用一系列GPS站来计算年位移（mm/yr）及其分布。 由此，可以计算应力和应变，并检查应力场以回答这些问题。 ***

9725766 Wernicke It is unclear if intracontinental plate boundaries, usually expressed as wide zones of diffuse deformation, behave as a system of microplates, or as a continuum. The Great Basin is a prime example of an area that behaves in this way. To determine if the observed strain pattern of today reflects a microplate trend, an 18 station GPS network has been established and has been operating for one year. This award provides an additional three years of funding to complete a total of four years of monitoring the network. After such time, the rate uncertainties will be sufficient to distinguish between microplate and continuum behavior. The basic scientific question to be solved will be a better understanding of intracontinental plate boundaries. This understanding is a fundamental concept to add to our knowledge of plate tectonics. In addition, the seismic hazard of such areas may be further quantified. To such an end, it is important to know if intraplate strain is localized within seismic belts, or if seismicity migrates secularly across a wide zone of relatively uniform strain accumulation. To solve this question, the Principal Investigator is using a series of GPS stations to compute yearly displacement in mm/yr and its distribution. From this, stress and strain can be calculated and the stress field examined to answer these questions. ***