@article {Alcalde2013481, title = {{3-D reflection seismic imaging of the hontom{\'\i}n structure in the basque-cantabrian Basin (Spain)}}, journal = {Solid Earth}, volume = {4}, number = {2}, year = {2013}, pages = {481{\textendash}496}, abstract = {The Basque-Cantabrian Basin of the northern Iberia Peninsula constitutes a unique example of a major deformation system, featuring a dome structure developed by extensional tectonics followed by compressional reactivation. The occurrence of natural resources in the area and the possibility of establishing a geological storage site for carbon dioxide motivated the acquisition of a 3-D seismic reflection survey in 2010, centered on the Jurassic Hontom{\'\i}n dome. The objectives of this survey were to obtain a geological model of the overall structure and to establish a baseline model for a possible geological CO2 storage site. The 36 km2 survey included approximately 5000 mixed (Vibroseis and explosives) source points recorded with a 25 m inline source and receiver spacing. The target reservoir is a saline aquifer, at approximately 1450 m depth, encased and sealed by carbonate formations. Acquisition and processing parameters were influenced by the rough topography and relatively complex geology. A strong near-surface velocity inversion is evident in the data, affecting the quality of the data. The resulting 3-D image provides constraints on the key features of the geologic model. The Hontom{\'\i}n structure is interpreted to consist of an approximately 10 7 m2 large elongated dome with two major (W-E and NW-SE) striking faults bounding it. Preliminary capacity estimates indicate that about 1.2 Gt of CO2 can be stored in the target reservoir. {\textcopyright} 2013 Author(s).}, doi = {10.5194/se-4-481-2013}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84893313475\&partnerID=40\&md5=9d3f67fb71a49a58d6a7a48c1da54f43}, author = {Alcalde, J.a b and Mart{\'\i}, D.a and Juhlin, C.c and Malehmir, A.c and Sopher, D.c and Saura, E.a and Marz{\'a}n, I.a and Ayarza, P.d and Calahorrano, A.e and P{\'e}rez-Esta{\'u}n, A.a b and Carbonell, R.a} }