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

海岛火山裂谷带与不稳定侧翼之间的应力相互作用

• 批准号: 50541226
• 负责人: Privatdozent Dr. Armin Freundt
• 金额: --
• 依托单位: Forschungseinheit Magmatische und Hydrothermale Systeme
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/50541226?language=en
• 关键词: Stress; interaction; between; rift; zones

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.

大型火山机构的发育受到侵入裂谷带和侧翼运动耦合的影响。因此，对不稳定侧面的尺寸和动力学的完全理解可以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。工作计划分为三个阶段。第一阶段是对夏威夷群岛、留尼汪岛和耶罗岛的地理信息系统数据库进行汇编和分析，以便从几何角度描述它们的裂谷带和不稳定的侧翼。在第二阶段，我们将进行模拟实验，以确定裂谷和侧翼运动期间变形的主要机制。在第三阶段，我们将使用数值模型定量研究与裂谷侵入和侧翼运动相关的静态应力变化。地理信息系统中所有获得的数据的最终组合将有助于更好地了解夏威夷、留尼汪岛和耶罗岛以及一般洋岛火山的裂谷带和不稳定侧翼的几何和动态耦合。

项目成果

Vertical and lateral collapse of Tharsis Tholus, Mars

火星塔尔西斯托勒斯的垂直和横向塌陷

• DOI: 10.1016/j.epsl.2011.03.012
• 发表时间: 2011
• 期刊: Earth and Planetary Science Letters
• 影响因子: 5.3
• 作者: Platz T;Münn S;Walter TR;Procter JN;McGuire PC;Dumke A;Neukum G
• 通讯作者: Neukum G