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实验，以研究rwenzori地区的速度结构和地震性。由25个地震站组成的临时网络将在该地区部署18个月。在此期间将记录的地震数据可以分为两个主要组：（a）将分析远距离事件的记录，以图像该地区的地壳和上层甲壳的结构细节（地震速度，衰减和各向异性）。这将为负责形成Rwenzori山的地球动力学过程的建模提供重要的限制（项目D2）。 （b）局部地震的记录将用于绘制Rwenzori地区的活动断层区。这将提供有关当前构造运动和地震风险的信息。我们的结果的解释将与基于磁铁研究的结构研究密切合作（项目A2）。我们对地震速度和各向异性的解释将受益于拟议的地幔异种石（Project A3）。在这个为期6年的项目的下半年，我们计划将实验研究扩展到东非裂谷系统（EARS）的西部分支的较大区域，该区域的特征是明显的地震活动。以前的大规模地震实验主要集中在较小的东部分支上。