Electromagnetic, rock magnetic, and geochemical properties of surficial sediments in Eckernförde Bay

Submarine groundwater discharge in coastal settings can massively modify the hydraulic and geochemical conditions of the seafloor. Resulting local anomalies in the morphology and physical properties of surface sediments are usually explored with seismo-acoustic imaging techniques. Controlled source electromagnetic imaging offers an innovative dual approach to seep characterization by its ability to detect pore-water electrical conductivity, hence salinity, as well as sediment magnetic susceptibility, hence preservation or diagenetic alteration of iron oxides. The newly developed electromagnetic (EM) profiler Neridis II successfully realized this concept for a first time with a high-resolution survey of freshwater seeps in Eckernförde Bay (SW Baltic Sea). We demonstrate that EM profiling, complemented and validated by acoustic as well as sample-based rock magnetic and geochemical methods, can create a crisp and revealing fingerprint image of freshwater seepage and related reductive alteration of near-surface sediments. Our findings imply that (1) freshwater penetrates the pore space of Holocene mud sediments by both diffuse and focused advection, (2) pockmarks are marked by focused freshwater seepage, underlying sand highs, reduced mud thickness, higher porosity, fining of grain size, and anoxic conditions, (3) depletion of Fe oxides, especially magnetite, is more pervasive within pockmarks due to higher concentrations of organic and sulfidic reaction partners, and (4) freshwater advection reduces sediment magnetic susceptibility by a combination of pore-water injection (dilution) and magnetite reduction (depletion). The conductivity vs. susceptibility biplot resolves subtle lateral litho- and hydrofacies variations.

Whole rock geochemistry and stable isotopes of rocks, fragments and foraminifers from two ODP Leg 166 holes

Total carbon and carbonate contents, quantitative carbonate mineralogy, trace metal concentrations, and stable isotope compositions were determined on a suite of samples from the Miocene sections at Sites 1006 and 1007. The Miocene section at Site 1007, located at the toe-of-slope, contains a relatively high proportion of bank-derived components and becomes fully lithified at a depth of ~300 meters below seafloor (mbsf). By contrast, Miocene sediments at Site 1006, situated in Neogene drift deposits in the Straits of Florida and composed primarily of pelagic carbonates, do not become fully lithified until a depth of ~675 mbsf. Diagenetic and compositional contrasts between Sites 1006 and 1007 are reflected in geochemical data derived from sediment samples from each site.

Estudio descriptivo de las bandas locales de Rock del ambiente under Posadeño desde la visión de sus músicos : Dimensiones sobre el/los cuerpo/s

En este trabajo se propone responder al siguiente interrogante: "¿cómo construyen una identidad a través de la corporalidad los músicos de bandas locales de rock del ambiente under?" Para ello se tratará de indagar sobre la visión, prácticas y valores de los músicos de las bandas locales sobre su ambiente y cómo viven ese ambiente a través de las diferentes representaciones corporales que logran construir. Es decir, como montan a través del cuerpo una identidad con marcas características como ser: vestimenta, tatuajes, movimientos corporales, arreglos del cabello, consumo de alcohol y drogas, cuidado del cuerpo, etc. Qué los diferencias de otros ambientes, y que a su vez los hacen propios y muy característicos de su hábitat. La estrategia metodológica elegida para esta propuesta de trabajo que comenzó en el año 2012 y sigue en curso, es de carácter cualitativo (observación y entrevistas), ya que permite recuperar la intencionalidad de los actores, reconocer el contexto en el cual se desarrollan las interacciones y sus diversas actividades. También se están tomando fotografías y videos cortos para un mejor registro y observación analítica de sus prácticas performativas. Se tomó como área de estudio a un conjunto de bares representativos de la ciudad de Posadas: "La Bionda Pub", "La Mexicana Bar", etc. Los casos a tener en cuenta para este trabajo, son músicos de bandas locales de rock con edades que van desde los 14 a los 48 años