Lindhorst, S., Appoo, J., Artschwager, M., Bialik, O., Birkicht, Matthias, Bissessur, D., Braga, J.-C., Budke, L., Bunzel, D., Coopen, P., Eberhardt, B., Eggers, D., Eisermann, J.O., El Gareb, F., Emeis, K., Geßner, A.-L., Hüge, Fabian, Knaack-Völker, H., Kornrumpf, N., Lenz, N., Lüdmann, T., Metzke, M., Naderipour, C., Neziraj, G., Reijmer, J., Reolid, J., Reule, N., Rixen, Tim, Saitz, Y., Schäfer, W., Schutter, I., Siddiqui, Claire, Sorry, A., Taphorn, B., Vosen, S., Wasilewski, T. and Welsch, A. (2019) Saya de Malha Carbonates, Oceanography and Biogeochemistry (Western Indian Ocean), Cruise No. SO270, 2019-09-06 - 2019-10-23, Hong Kong (China) - Port Louis (Mauritius) (Englisch). . SONNE-Berichte, SO270 . Gutachterpanel Forschungsschiffe, Bonn, 102 pp. DOI https://doi.org/10.2312/cr_so270.

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Abstract

Cruise RV SONNE SO270 (MASCARA) sailed from September 5 to October 24 2019. The cruise aimed on geological investigation of the Saya de Malha Bank, a poorly studied tropical carbonate platform in the western Indian Ocean, and part of the Mascarene Plateau. Data
acquisition during the cruise followed an interdisciplinary approach, comprising geophysical (multi-channel seismics), hydroacoustical (multibeam, PARASOUND), oceanographical (CTD, ADCP), biogeochemical (analyses of water column and sediment samples), sedimentological (texture and composition of surface sediments and sediment cores, OFOS), as well as paleontological and biological (foraminifera and plankton analyses) methods. In total, 995 nm of
reflection seismic, 5872 nm of multibeam bathymetry, and 4392 nm of PARASOUND data were acquired, as well as 96 stations were approached for sediment sampling, water column measurements, plankton sampling, and/or ocean floor observation. Main scientific aim was to test the hypothesis that the Saya de Malha Bank is a tropical carbonate platform controlled by water mass boundaries and currents, which exert a strong control on sedimentation, ecosystems and biogeochemistry. Post-cruise research will concentrate on (1) amending models of carbonate sequence stratigraphy, (2) developing a sedimentological model for a carbonate platform under the influence of internal waves, and (3) establishing a model of carbonate sedimentation in an area with varying biogeochemical nature. Based on this, the project aims at unlocking the record of paleoceanographical changes and of sea-level fluctuations recorded in the deposits of the Saya the Malha Bank. The results are expected to extend our knowledge about controlling factors on carbonate deposition, which is relevant for both, a better understanding of how carbonate platforms may evolve in our changing world, and for an improved interpretation of carbonate platform successions in the geological record.

Document Type: Report (Cruise Report)
Programme Area: PA2
Research affiliation: Infrastructure > Chemistry Laboratory
Biogeochemistry and Geology > Carbon and Nutrient Cycling
Affiliations > Not ZMT
DOI etc.: https://doi.org/10.2312/cr_so270
ISSN: 2510-764X
Date Deposited: 04 May 2022 14:01
Last Modified: 04 May 2022 14:05
URI: http://cris.leibniz-zmt.de/id/eprint/4918

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