Stress interaction between rift zones and unstable flanks on ocean island volcanoes

大型火山机构的发育受侵入裂谷带和侧翼运动耦合的影响。因此，对不稳定侧翼的尺寸和动力学的完全理解可能允许设想裂谷带的几何范围，反之亦然。该项目的目的是创建一个统一的模型，描述裂谷带和变形火山侧翼的几何和动态相互作用。工作计划包括三个阶段。第一阶段是汇编和分析夏威夷、留尼汪和耶罗岛的地理信息系统数据库，以便从几何学上确定其断裂带和不稳定侧翼的特征。在第二阶段，我们将进行模拟实验，以确定在裂谷和侧翼运动的变形的主要机制。在第三阶段，我们将使用数值模型来定量研究与裂谷侵入和侧翼运动相关的静态应力变化。最后将地理信息系统中获得的所有数据结合起来，将能更好地了解夏威夷、留尼汪岛和耶罗岛以及一般的海洋岛屿火山的断裂带和不稳定侧翼的几何和动态耦合。

The development of large volcanic edifices is affected by the coupling of intrusive rift zones and flank movement. Complete understanding of the dimension and dynamics of an unstable flank may hence allow conceiving the geometric extent of rift zones, and vice versa. The aim of this project is to create a unifying model that describes the geometric and dynamic interactions of rift zones and deforming volcano flanks. The working plan encompasses three phases. The first phase is the compilation and analysis of a GIS-database for the islands of Hawaii, La Réunion and El Hierro in order to geometrically characterize their rift zones und unstable flanks. In the second phase we will perform analog experiments to identify the principal mechanisms of deformation during rifting and flank movement. In the third phase we will use numerical models to quantitatively study static stress changes associated with rift intrusions and flank movement. A final combination of all the obtained data in the GIS-system shall yield a better understanding of the geometric and dynamic coupling of rift zones and unstable flanks at Hawaii, La Réunion and El Hierro, and at ocean island volcanoes in general.