Facies, grain shape and composition of Late Pleistocene, unconsolidated, volcanoclastic turbidites (Lesser Antilles, IODP 340 Sites 1397 and 1398): Understanding volcanic and climatic forcing of submarine mass flows
Final Report Abstract
Ion microprobe measurements on zircon separated from volcanoclastic turbidites resulted in a reliable chronological frame ≤ 850 ka for the sampled part of U1398B (IODP 340). A sedimentation rate of 4.8 cm/ka has been calculated for carbonatic ooze (the local background sedimentation at the site of U1398B in the Grenada basin west of the Lesser Antilles). The results of our petrological investigation of U1398B volcanoclastic turbidites allows the assumption that detritus originated mainly from volcanic centres on Dominica and Martinique. Turbidites deposited c. 410 ka contain amphibole typical for the Pitons du Carbet complex in western Martinique. The magmagenetic model with magma reservoirs at shallow and deeper levels, derived from onshore studies in the Lesser Antilles, is well reflected by our geobarothermometry on offshore volcanoclastic detritus.
Publications
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(2012). Heat flow in the Lesser Antilles island arc and adjacent back arc Grenada basin. Geochemistry, Geophysics, Geosystems, 13(8)
Manga, M., Hornbach, M. J., Le Friant, A., Ishizuka, O., Stroncik, N., Adachi, T., Aljahdali, M., Boudon, G., Breitkreuz, C. et al.
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(2014). Late Pleistocene stratigraphy of IODP Site U1396 and compiled chronology offshore of south and south west Montserrat, Lesser Antilles. Geochemistry, Geophysics, Geosystems, 15(7), 3000-3020
Wall-Palmer, D., Coussens, M., Talling, P. J., Jutzeler, M., Cassidy, M., Marchant, I., Palmer, M.R., Watt, S.F.L., Smart, C.W., Fisher, J.K., Hart, M.B., Fraass, A., Trofimovs, J., Le Friant, A., Ishizuka, O., Adachi, T., Aljahdali, M., Boudon, G., Breitkreuz, C. et al.
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(2015). Permeability and pressure measurements in Lesser Antilles submarine slides: Evidence for pressure-driven slow-slip failure. Journal of Geophysical Research: Solid Earth, 120(12), 7986-8011
Hornbach, M.J., Manga, M., Genecov, M., Valdez, R., Miller, P., Saffer, D., Adelstein, E., Lafuerza, S., Adachi, T., Breitkreuz, C. et al.
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(2015). Submarine record of volcanic island construction and collapse in the Lesser Antilles arc: First scientific drilling of submarine volcanic island landslides by IODP Expedition 340. Geochemistry, Geophysics, Geosystems, 16(2), 420-442
Le Friant, A., Ishizuka, O., Boudon, G., Palmer, M. R., Talling, P. J., Villemant, B., Adachi, T., Aljahdali, M., Breitkreuz, C. et al.
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(2019): Granulometry and microtextures on grain surfaces from subaerial and submarine deposits of recent eruptions of Soufrière Hills Volcano, Montserrat.- Freiberg Online Geosci. FOG, vol. 55: 1-71
Richter, M.-L. and Breitkreuz, C.
