Territorio e Identidad en los movimientos de desocupados en Argentina, el caso de la CTD-Aníbal Verón

Nos proponemos, a través del análisis empírico del caso CTD Aníbal Verón, análisis de sus prácticas y discursos, aportar comprensión a la compleja relación identidad-política-territorio. Nos concentraremos en la delimitación de las nociones de territorialidad e identidad política como dimensiones fundamentales. La CTD-AV sintetiza componentes reivindicativos y políticos en sus prácticas y relaciones, y consideramos que el territorio es un componente fundamental que configura la identidad colectiva e introduce en ésta la idea de lo político puesto que se define en un proceso de conflicto y disputa que abre el espacio del antagonismo. En diferentes experiencias-localizaciones de la CTD se desarrollan procesos de politización asociados a diferentes concepciones de territorio que analizamos para comprender su alcance y significado.

Sample locations, CTD data, mean spring and annual temperatures and salinities from World Ocean Atlas (WOA, 2001), and ICP-OES Mg/Ca data

Due to its strong gradient in salinity and small temperature gradient the Mediterranean provides an ideal setting to study the impact of salinity on the incorporation of Mg into foraminiferal tests. We have investigated tests of Globorotalia inflata and Globigerina bulloides in plankton tow and core top samples from the Western Mediterranean using ICP-OES for bulk analyses and LA-ICP-MS for analyses of individual chambers in single specimens. Mg/Ca observed in G. inflata are consistent with existing calibrations, whereas G. bulloides had significantly higher Mg/Ca than predicted, particularly in core top samples from the easterly stations. Scanning Electron Microscopy and Laser Ablation ICP-MS revealed secondary overgrowths on some tests, which could explain the observed high core top Mg/Ca. We suggest that the Mediterranean intermediate and deep water supersaturated with respect to calcite cause these overgrowths and therefore increased bulk Mg/Ca. However, the different species are influenced by diagenesis to different degrees probably due to different test morphologies. Our results provide new perspectives on reported anomalously high Mg/Ca in sedimentary foraminifera and the applicability of the Mg/Ca paleothermometry in high salinity settings, by showing that (1) part of the signal is generated by precipitation of inorganic calcite on the foraminifer test due to increased calcite saturation state of the water and (2) species with high surface-to-volume shell surfaces are potentially more affected by secondary Mg-rich calcite encrustation.