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SPP 1144:  From Mantle to Ocean: Energy, Material and Life Cycles on Spreading Axes

Subject Area Geosciences
Biology
Medicine
Term from 2003 to 2009
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 5471797
 
The aim of the Priority Programme is to carry out a multi-disciplinary, multi-segment scale study of the mid-ocean spreading system in the Atlantic. For this work two areas (15°N and 4-11°S) have been selected. The programme has two particulary highly innovative features:-- the integrated study of pre-defined areas of groups covering the highly disparate fields of petrology, volcanology, geodynamics, geophysics, hydrothermalism, microbiology, macrobiology, oceanography, water chemistry and convection modelling;-- the use of a state-of-the-art remotely-operated vehicle (ROV) for precise well-located sampling and observation of the seafloor.A detailed surface sampling will provide indications of regional variations in eruption processes, magma sources and hydrothermal deposits as well as the spatial distribution of faunal assemblages. Short drill cores will extend our knowledge into the subsurface. Geophysical investigations should give insights into the entire crust and deeper parts of the mantle.Using investigations in the same areas over several years we will get information about temporal variations in the different processes at spreading axes (e.g. eruptions, tections, hydrothermal and biological activities), information which will extend our present-day three-dimensional view of the ridges to include a time-axis.All investigations are of great relevance for the international ridge community. The InterRidge-initiative, which was established in 1992, is an important tool for the successful coordination of studies related to spreading axes. InterRidge promotes interdisciplinary, international studies at oceanic spreading axes through the exchange of information.
DFG Programme Priority Programmes
International Connection Brazil, Denmark, New Zealand, Switzerland, USA

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