Lithospheric structure and seismicity of the Rwenzori mountains as part of the Albertine rift system

作为阿尔伯丁裂谷系统一部分的鲁文佐里山脉的岩石圈结构和地震活动

• 批准号: 21317149
• 负责人: Professor Dr. Georg Rümpker
• 金额: --
• 依托单位: Fachrichtung Geophysik
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/21317149?language=en
• 关键词: Lithospheric; structure; seismicity; Rwenzori; mountains

We propose a seismological experiment to study the velocity structure and seismicity of the Rwenzori region. A temporary network consisting of 25 seismic stations will be deployed in the area for a period of 18 months. The earthquake data that will be recorded during this time can be divided into two major groups: (a) Recordings from teleseismic events will be analyzed to image the structural details (seismic velocity, attenuation and anisotropy) of the crust and upper mantle in this region. This will provide important constraints for the modeling of geodynamic processes responsible for the formation of the Rwenzori mountains (Project D2). (b) Recordings of local earthquakes will be used to map active fault zones in the Rwenzori region. This will provide information on current tectonic movements and earthquake risk. The interpretation of our results will be performed in close cooperation with structural studies based on magnetotelluric investigations (Project A2). Our interpretation of seismic velocities and anisotropy will benefit from the proposed studies on mantle xenoliths (Project A3). During the second half of this 6-year project we plan to extend the experimental investigation to a larger area along the western branch of the East African Rift System (EARS), which is characterized by pronounced seismic activity. Previous large-scale seismological experiments have focused mainly on the less-active eastern branch.

我们提出了一个地震学实验，研究速度结构和地震活动的鲁文佐里地区。将在该地区部署一个由25个地震台站组成的临时网络，为期18个月。在此期间将记录的地震数据可分为两大类：（a）将分析地震事件的记录，以便对该地区地壳和上地幔的结构细节（地震速度、衰减和各向异性）进行成像。这将为鲁文佐里山脉形成的地球动力学过程建模（项目D2）提供重要的制约因素。(b)当地地震的记录将用于绘制鲁文佐里地区的活动断层带地图。这将提供有关当前构造运动和地震风险的信息。对我们结果的解释将与基于大地电磁调查（项目A2）的结构研究密切合作。我们对地震速度和各向异性的解释将受益于对地幔捕虏体的拟议研究（项目A3）。在这个为期6年的项目的后半期，我们计划将实验性调查扩大到沿东非裂谷系（EARS）西部分支的沿着更大的地区，该地区的特点是明显的地震活动。以前的大规模地震学实验主要集中在不太活跃的东部分支。