Search

Facts confirming the hypothesis of contourite sediment infill of the Equatorial Mid-Ocean Canyon (EMOC) are presented. We examined two cores recovered in Cruises 37 and 43 of the R/V Akademik Ioffe (2012, 2013). The cores recovered upper Quaternary miopelagic clays on the EMOC floor (AI-3149) and the adjacent abyssal plain (AI-2620). The study of these cores unraveled significant differences in their composition. In contrast to the lithologically homogeneous Core AI-2620, Core AI-3149 includes interlayers enriched in the biogenic CaCO, terrigenous silt, and authigenic ferromanganese micronodules. These peculiarities are attributed to activity of the Antarctic Bottom Water (AABW) contour currents along the EMOC. [ABSTRACT FROM AUTHOR]

The article focuses on the investigation done on Pernambuco Seamounts in the Brazil basin. It mentions that structure of the upper part of the sedimentary covered seamount is analyzed by using a SES 2000 deep seismoacoustic profilograph whereas bottom relief was investigated by using an ELAC echosounder. It states that the volcanic rocks are related with subalkali trachy basalts by their petrochemical parameters and are characterized by high titanium (Ti) and phosphorous (P) contents. It also mentions that the rocks of petrochemical parameters are similar with basalts which makes volcanic bodies in the oceanic islands.