Caracterización geológica y geofísica de los basaltos de la Sierra de Queupuniyeu, provincia de Río Negro.

KOSTADINOFF, J; BJERG, E A; LABUDIA, C; NTAFLOS, TH

Rio Cuarto

Congreso; VII Congreso de Mineralogia y Metalogenia; 2004

<!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} @page Section1 {size:21.0cm 842.0pt; margin:70.9pt 3.0cm 70.9pt 3.0cm; mso-header-margin:35.45pt; mso-footer-margin:35.45pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> Dimension and geometry of the volcanic conduits feeding the basaltic lavas of the Sierra de Queupuniyeu was estimated based on rock densities and magnetic susceptibilities. Our results indicate that volcanism took place along several parallel narrow conduits, coincident with regional faults recognized in this area. The magnitude of the magnetic anomalies reflects the high magnetic susceptibility of the basaltic rocks, with values exceeding 0.040 SI. Low values of gamma radioactivity reflect the mantle origin of the basaltic rocks constituting the Sierra de Queupuniyeu.