An attempt towards direct dating of past earthquakes using trapped charge dating methods in the Central Alborz (Iran)

尝试使用厄尔布尔士中部地区（伊朗）的俘获电荷测年方法直接确定过去地震的年代

• 批准号: 507272784
• 负责人: Dr. Maryam Heydari
• 金额: --
• 依托单位: Professur für Sedimentologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/507272784?language=en
• 关键词: attempt; towards; direct; dating; past

Earthquakes occur around the world due to releasing energy from the Earth's interior. History indicates that this natural phenomenon can significantly endanger societies, particularly in regions situated at plate boundaries. One of these areas is Iran, with a long history of major earthquakes. As such, seismic hazard is a topic with high research priority for this region. Identifying active faults and estimating return periods (recurrence intervals) of large earthquakes are key scientific aims that play essential roles in earthquake risk assessment. There are various approaches to dating past earthquakes, including fault gouge dating. Although this technique has been employed for more than two decades on different active tectonics regions across the globe through trapped charge dating methods (ESR, luminescence dating), its application in Iran is unprecedented. In this project, for the first time, we plan to date fault gouges using trapped charge dating methods in the Central Alborz. This region is selected for this study since it encompasses the megacity of Tehran, including over 15 Mio. inhabitants in a larger area. The successful accomplishment of this project will open a doorway towards direct dating of past earthquakes in Quaternary time in Iran. It will significantly contribute to earthquake hazard assessment for this high-risk region.

由于地球内部释放能量，世界各地都会发生地震。历史表明，这种自然现象可能严重危害社会，特别是位于板块边界的地区。伊朗就是其中之一，该地区长期以来经常发生大地震。因此，地震灾害是该地区优先研究的课题。识别活动断层和估计大地震的重现期（重现间隔）是关键的科学目标，在地震风险评估中发挥着重要作用。有多种方法可以确定过去地震的年代，包括断层泥年代测定。尽管这项技术已经通过俘获电荷测年方法（ESR、发光测年）在全球不同的活动构造区域使用了二十多年，但它在伊朗的应用是前所未有的。在这个项目中，我们首次计划使用厄尔布尔士中部的俘获电荷测年方法来测定断层泥的年代。选择该地区进行本研究是因为它涵盖了德黑兰特大城市，其中包括超过 15 个 Mio。更大范围内的居民。该项目的成功完成将为直接确定伊朗第四纪过去地震的年代打开一扇大门。它将为该高风险地区的地震灾害评估做出重大贡献。