RAPID: Testing the erosion signature of coseismic landslides using cosmogenic catchment wide erosion rates - a case study of the 2016 Kaikoura Earthquake, New Zealand

RAPID：使用宇宙成因流域广泛侵蚀率测试同震滑坡的侵蚀特征 - 以 2016 年新西兰凯库拉地震为例

• 批准号: 1719622
• 负责人: Alison Duvall
• 金额: $ 3.01万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1719622&HistoricalAwards=false
• 关键词: RAPID; Testing; erosion; signature; coseismic

The 14 November 2016 M 7.8 Kaikoura Earthquake in New Zealand triggered thousands of landslides, blocked major highways and destroyed rail system infrastructure, leaving 1000 residents and tourists trapped in the seaside town of Kaikoura. This event and the investigator's previous research and sampling in the region presents a rare opportunity to study erosion associated with widespread landslides that occur at the same time as major earthquakes. This Rapid Response Research (RAPID) project will examine the erosion associated with these landslides using modern geological techniques. It will enhance international collaboration between the US and New Zealand and involve three graduate students in the scientific research process. The project is led by an early career female investigator.This project will address the following questions of relevance to the geomorphology and geochronology communities: 1) What effect does coseismic landsliding have on detrital cosmogenic radionuclide (CRN) derived basin wide erosion rates? and 2) What is the contribution of periodic but widespread coseismic landslides to erosional mass flux in tectonically active mountain belts such as the Kaikoura Ranges? The principal investigator and her team will address these questions by doing repeat detrital 10Be CRN measurements in six drainages shaken by the earthquake. These samples will be used to examine basin-wide erosion rates following extensive coseismic landsliding. Landsliding is predicted to complicate detrital CRN measurements of basin wide erosion rates. This study will circumvent this complication by constraining erosion rates before (with previously collected samples) and directly following a large earthquake (to be sampled this January 2017).

2016年11月14日，新西兰7.8 Kaikoura地震引发了数千条滑坡，封锁了主要高速公路和破坏的铁路系统基础设施，使1000名居民和游客被困在Kaikoura的海滨小镇。该事件以及研究人员先前在该地区的研究和抽样提供了一个难得的机会，可以研究与主要地震同时发生的广泛滑坡相关的侵蚀。这项快速响应研究（快速）项目将使用现代地质技术研究与这些滑坡相关的侵蚀。它将增强美国和新西兰之间的国际合作，并让三名研究生参与科学研究过程。该项目由早期职业女性调查员领导。该项目将解决以下与地貌学和地球人工学群落相关的问题：1）1）Coseismiscic Landsliding对碎屑宇宙性放射性核素（CRN）衍生的盆地宽侵蚀率有什么影响？ 2）周期性但广泛的coseis震滑落对构造活跃的山带（例如Kaikoura Ranges）中侵蚀性质量通量的贡献是什么？首席调查员和她的团队将通过在地震动摇的六个排水管中进行重复10BE CRN测量来解决这些问题。这些样品将用于检查广泛的Coseissic土地滑动后盆地范围的侵蚀率。预计陆滑使盆地广泛侵蚀率的碎屑CRN测量变得复杂。这项研究将通过限制侵蚀率（以前收集的样本）并直接在大地震发生后（将于今年1月采样）来避免这种并发症。