Author:
Canora Carolina,Cuevas Rodríguez Jaime,Martínez Díaz José Jesús,Garralón Antonio
Abstract
Continental carbonates, such as travertines and tufas, formed from CO2-rich groundwater degassing as it emerges at the Earth’s surface, are often associated with major crustal-scale faults. The Carraclaca site, in the Lorca-Totana section of the Alhama de Murcia Fault, Spain, presents a complex geomorphological landscape controlled by active tectonics. The geology here records the interaction between Quaternary alluvial fans, travertines, and a pop-up structure developed in a transpressional section of the fault. The Alhama de Murcia Fault is an 80 km long left-lateral strike-slip fault that is one of the main seismogenic structures in the Iberian Peninsula. In this work, we examined the relation between travertine precipitation in the Carraclaca site and the tectonic activity of this fault zone through morphological and geochemical studies. The δ13C and δ18O isotopic signals indicate that the carbonate deposits are hydrothermal. In addition, the 87Sr/86Sr ratios in the samples suggest subsurface fluid interaction with the Miocene sediments and the Alpujárride basement, located below the alluvial deposits. Tectonic activity in the Alhama de Murcia Fault might generate the opening of deep water circulation in the crust every time a seismic event occurs, giving rise to hydrothermally derived carbonates precipitation. Deep waters rise and reach the surface interacting with meteoric waters, resulting in travertine formation. Therefore, the Carraclaca carbonate deposits study can inform us about the seismogenic cycle of the fault in the Lorca-Totana section.
Funder
Universidad Complutense de Madrid
Subject
General Earth and Planetary Sciences
Reference100 articles.
1. Tasas de acortamiento locales en el afloramiento de los Baños de Carraclaca. Segmento Lorca-Totana de la Falla de Alhama de Murcia;Alonso-Henar,2018
2. Morphology and structural setting of quaternary travertines at pamukkale, Turkey;Altunel;Geol. J.
3. Active fissuring, faulting and travertine deposition at Pamukkale, Western Turkey;Altunel
4. Miocene extensional deformation in the region of aguilas–mazarrón (eastern betic cordillera);Alvarez;Estud. Geol.,1989
5. Palaeoclimatic records from stable isotopes in riverine tufas: Synthesis and review;Andrews;Earth-Science Rev.,2006
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