GNGTS 2015 - Atti del 34° Convegno Nazionale

GNGTS 2015 S essione 3.1 35 Eagles et al. (2005) proposed an Eocene age (between 34.7 and 41 Myr) for the development of the Dove Basin, based on magnetic anomaly models and on the depth of the oceanic basement. Barker et al. (2013) suggested an age between 42 and 43 Myr for the oceanic crust, on the base of heat flow data. Galindo-Zaldivar et al. (2014) proposed, considering petrological, geochemical and geophysical data, integrated by absolute dating of dredge samples, that the Dove Basin was a back-arc basin developed from the Late Oligocene to the Early Miocene with a final volcanic episode at around 18 Myr. Analysis of seismic data. Seismic Data description. The multichannel seismic reflection profile used in this work is the portion of the line IT95-167 crossing the Dove Basin in the south Scotia Sea. The data were collected by the Italian National Program for Antartic Research Fig. 2 – a) Portion of post-stack time migrated seismic profile I95-167 from SP1600 to SP2070; the blue arrows depict the extension of the observed BSR; b) application of Apparent Polarity seismic attribute obtained by Petrel software; the blue arrows indicate the position of BSR, which evidences a positive polarity; c) pre stack depth migrated section that let to reconstruct the real geometry of the layers and the depth of the BSR at about 600 m below the sea bottom.