- Normally in paleoseismology, the study of the tectonic slip-rate is performed in trenches on the fault scarp, or by the estimation of fault movements from the geomorphic features. In this work, we have carried out a paleoseismic analysis of the Benis Fault, located in southeast Spain, combined with a geothermal analysis inside a deep cave related to the fault (-350 m). Thus, we have estimated the last earthquake magnitude and time of occurrence from evidence of ceiling collapse and displaced carbonate blocks inside a cave, which is developed across the fault. The magnitude was obtained from the application of the empirical relationship of the fault parameters and coseismic vertical displacement, yielding a value ranging between M 5.9 and M 6.5. Moreover, we dated this paleoearthquake by the paleontological record of a "Lynx pardinus spelaea", with an age of 65 +/- 18 ka BP. Additionally, we have measured the thermal profile of the Benis Cave (-350 m of depth), from single rock point temperature measurements during 2 years. TheNormally in paleoseismology, the study of the tectonic slip-rate is performed in trenches on the fault scarp, or by the estimation of fault movements from the geomorphic features. In this work, we have carried out a paleoseismic analysis of the Benis Fault, located in southeast Spain, combined with a geothermal analysis inside a deep cave related to the fault (-350 m). Thus, we have estimated the last earthquake magnitude and time of occurrence from evidence of ceiling collapse and displaced carbonate blocks inside a cave, which is developed across the fault. The magnitude was obtained from the application of the empirical relationship of the fault parameters and coseismic vertical displacement, yielding a value ranging between M 5.9 and M 6.5. Moreover, we dated this paleoearthquake by the paleontological record of a "Lynx pardinus spelaea", with an age of 65 +/- 18 ka BP. Additionally, we have measured the thermal profile of the Benis Cave (-350 m of depth), from single rock point temperature measurements during 2 years. The temperature profile shows three different parts inside the cave, the shallow heterogeneous thermal zone till 50 m depth; the homogeneous thermal zone 150 m till with constant temperature and the hetero-thermal deep zone, deeper than 150 m and till the deepest zone (350 m). Furthermore, we have estimated the Vertical Geothermal Gradient, 1.85 degrees C/100 m for the deepest zone (-150; -290 m). The temperature increases with depth, showing a reverse thermal profile in comparison with normal gradients in deep caves. Finally, we have calculated the heat flux of 0.46 mWm(2). (C) 2016 Elsevier Ltd and INQUA. All rights reserved.…
MetadatenVerfasserangaben: | Raul Perez-Lopez, Saul Martin-Velazquez, Sergio Sanchez-MoralORCiD, Magda PatyniakORCiDGND, Jose Lopez-Gutierrez, Soledad Cuezva, J. Lario, P. G. Silva, M. A. Rodriguez-Pascua, J. L. Giner-Robles |
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DOI: | https://doi.org/10.1016/j.quaint.2016.11.026 |
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ISSN: | 1040-6182 |
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ISSN: | 1873-4553 |
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Titel des übergeordneten Werks (Englisch): | Quaternary international : the journal of the International Union for Quaternary Research |
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Verlag: | Elsevier |
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Verlagsort: | Oxford |
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Publikationstyp: | Wissenschaftlicher Artikel |
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Sprache: | Englisch |
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Jahr der Erstveröffentlichung: | 2017 |
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Erscheinungsjahr: | 2017 |
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Datum der Freischaltung: | 20.04.2020 |
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Freies Schlagwort / Tag: | Active fault; Cave; Heat flux; Slip-rate; Speleoseismology |
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Band: | 451 |
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Seitenanzahl: | 11 |
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Erste Seite: | 165 |
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Letzte Seite: | 175 |
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Fördernde Institution: | "Espeleo-Club RESALTES" from Murcia province; MINECO-FEDER Spanish Ministry [SISMOSIMA CGL2013-47412-C2-2-P, CGL2015-67169-P] |
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Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
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Peer Review: | Referiert |
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Name der Einrichtung zum Zeitpunkt der Publikation: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Erd- und Umweltwissenschaften |
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