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DIGITAL.CSIC
Article . 2017 . Peer-reviewed
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Condiciones ambientales de la Sima del Vapor: relación con la Falla de Alhama de Murcia y su actividad tectónica reciente

Authors: Pérez López, Raúl; Sánchez-Moral, Sergio; Cuezva, Soledad; Martínez-Díaz, J. J.; Quiles, L.; Bañón, E.; Marcos-Nuez, A.;

Condiciones ambientales de la Sima del Vapor: relación con la Falla de Alhama de Murcia y su actividad tectónica reciente

Abstract

[ES] La Sima del Vapor, localizada en Alhama de Murcia, presenta unas características ambientales que la hacen única en su género. A su elevada temperatura, 40ºC y su escasez en oxígeno, 17%, hay que sumarle una elevada cantidad de CO2, 10.900 ppm, en sus escasos 85 metros de desarrollo vertical. En este trabajo, hemos llevado a cabo un muestreo del aire en el interior de la sima para estudiar la traza isotópica del CO2 y del CH4 y poder determinar su origen. Por otro lado, al estar desarrollada a favor de la Falla de Alhama de Murcia, hemos introducido una serie de registradores en continuo de temperatura y CO2, para analizar su variabilidad en el tiempo y su potencial relación con la sismicidad asociada a dicha falla, y registrada entre septiembre del año 2015 y enero del 2016. En concreto, la cueva se desarrolla en el segmento de Alhama - Alcantarilla, con 21 km de longitud media y apareciendo como una falla en desagarre con componente inverso. Los perfiles de temperatura en profundidad indican un gradiente geotérmico subsuperficial de 3,2ºC/100m.

[EN] The Vapor cave, located within the Murcia province (SE of Spain), exhibits a peculiar environmental parameters, high temperature (40ºC), scarce oxygen (17%) and high values of CO2 (>10,000 ppm).The depth reaches 80 m and it is constrained by the Alhama de Murcia Fault, one of the most seismically active faults in the Iberian Peninsula.In this work, we have carried out a gas content analysis for the atmosphere inside the cave, mainly CO2 and CH4, and their isotopic analysis. Moreover, a set of loggers were placed at different depths with the aim to get a temporal series of temperature and carbon dioxide. The correlation between these parameters and the earthquakes recorded in the vicinity brings us an opportunity for understanding the dynamics of this fault. The trace of this fault, approximately 21 km, with geometry of oblique sinistral fault, suggests a potential earthquake of M6. The estimated vertical geothermal gradient is 3.2ºC/100m.

Este trabajo ha sido financiado parcialmente por los proyectos SISMOSIMA, CGL2013-47412-C2-2-P, INTERGEO CGL2013- 47412-C2-1-P y el proyecto CGL2013-43324-R en los análisis isotópicos del C.

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Country
Spain
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Keywords

Cueva, Falla activa, Cave, Alta temperatura, Murcia, CO2, High temperature, Active fault

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
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