Imaging crustal structures through a passive seismic imaging approach in a mining area in Saxony, Germany

<p>We have used several flooding-induced microseismic events that occurred in an abandoned mining area to image geological structures close to the hypocentres in the vicinity of the mine. The events have been located using a migration-based localization approach. We used the recorded full wave...

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Autores principales:	H. Hassani, F. Hloušek, S. Buske, O. Wallner
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Geology QE1-996.5 Stratigraphy QE640-699
Acceso en línea:	https://doaj.org/article/9726c10443214ab7940286769f114e6a
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spelling	oai:doaj.org-article:9726c10443214ab7940286769f114e6a2021-11-30T07:53:13ZImaging crustal structures through a passive seismic imaging approach in a mining area in Saxony, Germany10.5194/se-12-2703-20211869-95101869-9529https://doaj.org/article/9726c10443214ab7940286769f114e6a2021-11-01T00:00:00Zhttps://se.copernicus.org/articles/12/2703/2021/se-12-2703-2021.pdfhttps://doaj.org/toc/1869-9510https://doaj.org/toc/1869-9529<p>We have used several flooding-induced microseismic events that occurred in an abandoned mining area to image geological structures close to the hypocentres in the vicinity of the mine. The events have been located using a migration-based localization approach. We used the recorded full waveforms of these localized microseismic events and have processed these passive source data as if they resulted from active sources at the known hypocentre location and origin time defined by the applied location approach. The imaging was then performed using a focusing 3D prestack depth migration approach for the secondary P-wave arrivals. The needed 3D migration velocity model was taken from a recent 3D active (controlled-source) seismic survey in that area. We observed several clear and pronounced reflectors in our obtained 3D seismic image cube, some of them related to a major fault zone in that area and some correlating well with information from the nearby mining activities. We compared our results to the 3D seismic image cube obtained directly from the 3D active seismic survey and have found new structures with our approach that were not known yet, probably because of their steep dips which the 3D active seismic survey had not illuminated. The location of the hypocentres at depth with respect to the illumination angles of those structures proved to be favourable in that case, and our 3D passive image complements the 3D active seismic image in an elegant way, thereby revealing new structures that cannot be imaged otherwise with surface seismic configurations alone.</p>H. HassaniF. HloušekS. BuskeO. WallnerCopernicus PublicationsarticleGeologyQE1-996.5StratigraphyQE640-699ENSolid Earth, Vol 12, Pp 2703-2715 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geology QE1-996.5 Stratigraphy QE640-699
spellingShingle	Geology QE1-996.5 Stratigraphy QE640-699 H. Hassani F. Hloušek S. Buske O. Wallner Imaging crustal structures through a passive seismic imaging approach in a mining area in Saxony, Germany
description	<p>We have used several flooding-induced microseismic events that occurred in an abandoned mining area to image geological structures close to the hypocentres in the vicinity of the mine. The events have been located using a migration-based localization approach. We used the recorded full waveforms of these localized microseismic events and have processed these passive source data as if they resulted from active sources at the known hypocentre location and origin time defined by the applied location approach. The imaging was then performed using a focusing 3D prestack depth migration approach for the secondary P-wave arrivals. The needed 3D migration velocity model was taken from a recent 3D active (controlled-source) seismic survey in that area. We observed several clear and pronounced reflectors in our obtained 3D seismic image cube, some of them related to a major fault zone in that area and some correlating well with information from the nearby mining activities. We compared our results to the 3D seismic image cube obtained directly from the 3D active seismic survey and have found new structures with our approach that were not known yet, probably because of their steep dips which the 3D active seismic survey had not illuminated. The location of the hypocentres at depth with respect to the illumination angles of those structures proved to be favourable in that case, and our 3D passive image complements the 3D active seismic image in an elegant way, thereby revealing new structures that cannot be imaged otherwise with surface seismic configurations alone.</p>
format	article
author	H. Hassani F. Hloušek S. Buske O. Wallner
author_facet	H. Hassani F. Hloušek S. Buske O. Wallner
author_sort	H. Hassani
title	Imaging crustal structures through a passive seismic imaging approach in a mining area in Saxony, Germany
title_short	Imaging crustal structures through a passive seismic imaging approach in a mining area in Saxony, Germany
title_full	Imaging crustal structures through a passive seismic imaging approach in a mining area in Saxony, Germany
title_fullStr	Imaging crustal structures through a passive seismic imaging approach in a mining area in Saxony, Germany
title_full_unstemmed	Imaging crustal structures through a passive seismic imaging approach in a mining area in Saxony, Germany
title_sort	imaging crustal structures through a passive seismic imaging approach in a mining area in saxony, germany
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/9726c10443214ab7940286769f114e6a
work_keys_str_mv	AT hhassani imagingcrustalstructuresthroughapassiveseismicimagingapproachinaminingareainsaxonygermany AT fhlousek imagingcrustalstructuresthroughapassiveseismicimagingapproachinaminingareainsaxonygermany AT sbuske imagingcrustalstructuresthroughapassiveseismicimagingapproachinaminingareainsaxonygermany AT owallner imagingcrustalstructuresthroughapassiveseismicimagingapproachinaminingareainsaxonygermany
_version_	1718406764738641920

Imaging crustal structures through a passive seismic imaging approach in a mining area in Saxony, Germany

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