Quantifying the interaction of seismicity and gas transport in fractured hard rock at earthquake focal depth (DAFGAS-II)

量化地震震源深度处裂隙硬岩中地震活动与气体输送的相互作用 (DAFGAS-II)

• 批准号: 216428757
• 负责人: Professor Dr. Jörg Erzinger
• 金额: --
• 依托单位: Sektion 3.1: Anorganische und Isotopengeochemie
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/216428757?language=en
• 关键词: Quantifying; interaction; seismicity; gas; transport

The direct observation of gas transport in fractured hard rock and the seismic signal recording performed at 3.54 km depth, TauTona gold mine, South Africa, are the basic results of our recently completed ICDP-project DAFGAS, conducted in the framework of the international NELSAM-DAFSAM project, Natural Earthquake Laboratory in South African Mines - Drilling Active Faults in South African Mine. The significant variations of certain geogases and the local seismic signal attested the blasting triggered geogas transport through fractured hard rock. But lacking isochronal geogas and seismic data prevented the explicit cross-correlation data analysis. The aim of this current project is the collection of contemporaneous geogas and seismic data as basis prerequisite for the further understanding of the interrelation between fluid flow and seismicity at earthquake focal depth. With our existing sensor based gas monitoring system, four reactivated seismometers, and support from the seismic surveillance team of the TauTona mine and from students from the University of the Free State, Bloemfontein, SA, we are confident of reaching this aim.

在南非TauTona金矿3.54 km深处进行的断裂硬岩中气体运移的直接观测和地震信号记录是我们最近完成的ICDP项目DAFGAS的基本成果，该项目是在国际NELSAM-DAFSAM项目南非矿山自然地震实验室-南非矿山活动断层钻探的框架内进行的。某些地气和当地地震信号的显着变化证明了爆破触发地气通过破碎的硬岩传输。但由于缺乏等时地气和地震数据，无法进行显式互相关数据分析。本项目的目的是收集同期地气和地震数据，作为进一步了解震源深度流体流动与地震活动之间相互关系的基础先决条件。凭借我们现有的基于传感器的气体监测系统、四个重新启动的地震仪以及来自TauTona矿山地震监测团队和南非布隆方丹自由州大学学生的支持，我们有信心实现这一目标。