First results of SONNE cruise SO121

The Red Sea is a very young ocean, and is one of the most interesting areas on Earth (ocean in statu nascendi). It is the only ocean where hydrothermal activity associated with ore formation occurs in a sterile environment (anoxic, hot, saline). In addition, its geographical position means that it is predestined to record the monsoonal history of the region in detailed sedimentary sequences. The major aim of the present project is to investigate the dynamics of hydrothermal systems in selected Deeps (Atlantis-II, Discovery, Kebrit, Al Wajh), Additional palaeoceanographic and microbiological questions should also be addressed. Specific aims are: 1. To study the hydrographic changes in individual Deeps (hydrothermal region Atlantis-II) and to investigate the causes of the temperature increase in the last few years (increased heat flow - higher temperature of the brine supply - higher brine flow rates?). 2.a. To document the influence of the hydrothermal systems on the sedimentary organic matter in the Deeps. In particular, the thermogenic production and migration of hydrocarbons in the sediments will be studied. The complex formation mechanisms (bacterial, thermogenic) of short-chain hydrocarbons (trace gases) will also be examined, 2.b. in addition, the polar and macromolecular fraction in samples from the various deeps will be studied in order to elucidate the formation, structure and source of the macromolecular oil fraction. 3. To clarify the palaeoceanographic conditions, sea-level changes and the climatic history (relationship of the circulation system and nutrient supply to the monsoon) of the southern Red Sea. 4. To separate microorganisms from the brines and to characterise them in terms of their metabolic physiology and ecology, and to describe their taxonomy.

Creso y Solón en el espejo de la Atlántida platónica

La influencia de las Historias de Heródoto en los dos relatos platónicos sobre la Atlántida (en el Timeo y en el Critias) ha sido ampliamente señalada. Sin embargo, hasta ahora no se ha tenido en cuenta de manera específica la influencia de la historia de Creso de Heródoto (y de ella, sobre todo, la construcción de la figura de Solón) en la narración platónica. Buscaremos, a través de la guía del personaje Solón, establecer nuevas conclusiones sobre el estatuto del relato atlántico, así como precisiones sobre su género literario y sobre su relación con la filosofía y la historia en Platón.