CARBMED
The Holocene cool-water carbonates of the Western Mediterranean Sea
This is a joint project with Christian Hübscher (Hamburg), Juan Carlos Braga (Granada), Gerhard Schmiedl (Hamburg), Thomas Lüdmann (Hamburg), and Klaus Reicherter (Aachen). The project is funded by the Deutsche Forschungsgemeinschaft.
Abstract
The objective of this study is to present key models for cool-water carbonates in the Western Mediterranean, and to document the reaction of these systems to Holocene palaeoclimatic and sea-level change. This will be achieved through an interdisciplinary analysis of samples and geophysical data recovered during the cruise M69/1 of the research vessel METEOR on Alboran Ridge, in the bay of Oran, and on the southern shelf of the island of Mallorca. Based on sediment texture and composition, as well as macropaleontology, facies will be defined and temporal changes of facies zonations will be shown. Mapping thickness variations and sediment geometries in parasound profiles will allow to establish a sequence stratigraphic model. Linking sedimentological and geophysical data, and using absolute age dates, for the first time it will be possible to produce a model of the Holocene cool-water carbonate sequence in the Mediterranean Sea. Analyses of the foraminiferal faunas and generation of planktonic and benthic stable isotope records will provide information on the impact of climatic and oceanographic changes on the neritic carbonate ecosystems and will allow the comparison of these signals with the deep-sea record. Based on Recent distribution patterns, transfer functions will be generated and applied to the sediment cores for quantitative paleobathymetric reconstructions. Linking these data with sequence stratigraphy and carbonate facies data, we will be able to separate the impact of the postglacial eustatic sea-level rise from regional neotectonic and sedimentological processes.