A seismic hazard assessment for a tailing dam site in Minas Gerais - Brazil

Abstract

PreviousNext No Access13th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 26–29 August 2013A seismic hazard assessment for a tailing dam site in Minas Gerais - BrazilAuthors: Jackeline CastañedaTania BustamanteFrank PerezCelso RomanelJackeline CastañedaDEC/PUC-RJSearch for more papers by this author, Tania BustamanteDEC/PUC-RJSearch for more papers by this author, Frank PerezDEC/PUC-RJSearch for more papers by this author, and Celso RomanelDEC/PUC-RioSearch for more papers by this authorhttps://doi.org/10.1190/sbgf2013-362 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract This paper presents a seismic hazard analysis for a tailing dam site located in the state of Minas Gerais, in the Southeast region of Brazil, near the city of Mariana, with UTM coordinates E=659343,205 and N=7764575,57. According to Berrocal et al. (1993) the seismicity in the Southeast region presents a diffuse distribution, thus not allowing the clear identification of faults and other tectonic features as active seismogenic sources, even though it may be admitted that the occurrence of earthquakes in the region are associated to reactivation of older faults or the emergence of new ones. In this study the hazard seismic evaluation was estimated considering a polygonal area encompassing 472 events with magnitude 3 or higher collected from the Brazilian seismic catalog (IAG/USP), excluded the eventual aftershocks in order to ensure statistically independent data. Additionally, due to seismotectonic characteristics of the region, the attenuation law proposed by Toro (1997, 2002) was adopted to any epicentral distance and earthquake magnitude. The maximum horizontal acceleration in the bedrock (PGA) was determined considering recurrence periods of 72 years, 475 and 975 years for a 50 year life-span of the tailing dam. The probabilistic analyses presented herein were carried out using the software CRISIS2007. Keywords: seismic, South America, tectonics, earthquakePermalink: https://doi.org/10.1190/sbgf2013-362FiguresReferencesRelatedDetailsCited ByImportance of seismic wave frequency in FEM-based dynamic stress and displacement calculations of the earth slope9 February 2022 | Studia Geotechnica et Mechanica, Vol. 44, No. 1Validation of Rayleigh Wave Theoretical Formulation with Single-Station Rotational Records of Mine Tremors in Lower Silesian Copper Basin20 May 2021 | Sensors, Vol. 21, No. 10 13th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 26–29 August 2013ISSN (online):2159-6832Copyright: 2013 Pages: 2001 publication data© 2013 Published in electronic format with permission by the Brazilian Geophysical SocietyPublisher:Society of Exploration Geophysicists HistoryPublished: 09 Jan 2014 CITATION INFORMATION Jackeline Castañeda, Tania Bustamante, Frank Perez, and Celso Romanel, (2013), "A seismic hazard assessment for a tailing dam site in Minas Gerais - Brazil," SEG Global Meeting Abstracts : 1762-1767. https://doi.org/10.1190/sbgf2013-362 Plain-Language Summary KeywordsseismicSouth AmericatectonicsearthquakePDF DownloadLoading ...