Seismic - Gravimetric Models in the North region of the Cuyo basin, Argentina

LUNA,E.D.; GARCIA, A.M.; ALVAREZ,O.; NOVARA I.; CARUGATI,G.

FOZ DE IGUAZU

Congreso; MEETING OF THE AMERICAS 2010; 2010

AGU

In the northern of Cuyo Basin in Argentina, gravimetric and seismic interpretation were done with the support of geological interpretation to the means of making a upper crustal integrator model in two sections of the study area. From the processing of gravimetric data, there was a Bouguer map of anomalies obtained, which was adequately filtered to the purpose of obtaining residual anomalies linked to the upper crustal. The analysis of these Bouguer residual anomalies allowed to identifying the Jocoli graven, on the front of to fold and thrust belt of Precordillera. To the East of the graven and to the South of Pie de Palo range, a high gravimetric can be observed, in abidance with previous geophysical studies. After analyzed the morphology of Bouguer anomalies, the depths and distributions of generating sources of the anomalies were determined through the Werner and Euler deconvolutions as well as the average spectrum power for the structures of the study area. Anomaly enhancement techniques such as analytical signal, tilt and phase of tilt were done to highlight different wavelength anomalies. With the obtained results, two upper crustal models were done in two sections. The models proved the Bouguer residual anomaly and the interpretation of the seismic horizons. In the model located to the South of the study area, a basin sedimentary infilled by Triassic sediments (of 800 to 1000 m) and around 7 km of Tertiary-Quaternary sediments were interpreted, indicating the area of thin and thick-skinned tectonic clash. In the North seismic - gravimetric model, a zone of low speed/low density was identified, linked to Triassic deposits which would generate expectation of hydrocarbons exploration