Pathways of volatile migration in the crust beneath Harrat Lunayyir (Saudi Arabia) during the unrest in 2009 revealed by attenuation tomography

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• 作者：Ilya Sychev^a ; ^{ilya.sychev@gmail.com} ; Ivan Koulakov^a ; ^b ; ^{ivan.science@gmail.com} ; Sami El Khrepy^c ; ^d ; ^{k_sami11@yahoo.com} ; Nassir Al-Arifi^c ; ^{nalarifi@ksu.edu.sa}
• 关键词：Harrat Lunayyir ; Attenuation ; Seismic tomography ; Seismic unrest ; Volatile migration
• 刊名：Journal of Volcanology and Geothermal Research
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：330
• 期：Complete
• 页码：1-13
• 全文大小：4014 K
• 卷排序：330

文摘

We present P and S wave attenuation models beneath Harrat Lunayyir (Saudi Arabia). We use the t* measurements for events recorded during an unrest in April–June 2009. P and S models reveal the same high-attenuation zone in the upper crust. This zone marked by seismicity possibly indicates the pathway of gas output. The cause of the Lunayyir unrest is a volatile injection from a deep magma source.