Proposal for a Planning Workshop: Deformation Rates at 10 to 10 Million Years: An Active Trust Belt in the Central Andes

大陆地球动力学中最深刻的问题之一是如何将同震滑动事件期间10-6年时间尺度上的地球变形与数百万至数千万年尺度上的造山过程联系起来。瞬时形变如何整合超过6个数量级(或更多)的时间采样窗口来产生我们今天看到的造山带？如今，随着许多地球科学家例行公事地将GPS测量的速率外推到造山时间尺度上，很好地理解这种做法的陷阱变得越来越重要。巨大的山带是由逆冲系统形成的，到目前为止，这些系统还没有像走滑控制的系统或盆地和山脉等伸展系统那样得到深入研究。由于之前的大量工作以及相对简单的板块设置，阿根廷西部的Precordillera是世界上研究真正的造山过程的最佳地点之一，时间范围从几十年到数百万年。这一奖项为一个讲习班提供了资金，使该区域的专家以及完成我们对不同时间采样窗口的形变划分的理解所需的技术专家汇聚一堂。讲习班的目的是明确确定该区域的研究类型，以便进一步了解不同时间尺度上的变形之间的联系。与会者将包括InSAR和GPS大地测量、地震地震学、古地震学和构造地貌学以及构造地质学和地层学方面的专家。

0430760AllmendingerOne of the most profound questions in continental geodynamics is how to relate deformation of the earth at time scales of 10-6 years during a coseismic slip event to mountain building processes at the scale of millions to tens of millions of years. How does the instantaneous deformation integrate over 6 orders of magnitude (or more) of temporal sampling windows to produce the orogens we see today? As many geoscientists these days routinely extrapolate GPS measured rates to mountain building time scales, it is becoming increasingly important to understand well the pitfalls of such practices.Great mountain belts are made by thrust systems which, to date, have not been studied as intensively as strike-slip dominated systems or extensional regimes such as the Basin and Range. Thanks to extensive previous work as well as a relatively simple plate setting, the Precordillera of western Argentina is one of the best places in the world to study true mountain building processes at a range of temporal scales from decades to millions of years. This award provides funds for a workshop to bring together experts on this region as well as experts in techniques necessary to complete our understanding of deformation partitioning at different temporal sampling windows. The objective of the workshop is to identify clearly the types of studies in this region that will further the understanding of the links between deformations at different time scales. The attendees will include experts on InSar and GPS geodesy, earthquake seismology, paleoseismology and tectonic geomorphology, and structural geology and stratigraphy.