2016•Proceedings of the Integrated Ocean Drilling Program. Expedition reports/Proceedings of the Integrated Ocean Drilling ProgramOpen access
Synthesis: stratigraphy and age control for IODP Sites U1394, U1395, and U1396 offshore Montserrat in the Lesser Antilles
Maya Coussens, Deborah Wall-Palmer, Peter J. Talling, Sebastian F.L. Watt, Stuart J. Hatter, Michael Cassidy, Mike Clare, Martin Jutzeler, Robert G. Hatfield, M. C. McCanta, Kyoko S. Kataoka, Daisuke Endo, Martin R. Palmer, Adam J. Stinton, Akihiko Fujinawa, Georges Boudon, Anne Le Friant, Osamu Ishizuka, Thomas Gernon, T. Adachi, Mohammed H. Aljahdali, Christoph Breitkreuz, A.J. Frass, M. J. Hornbach, Élodie Lebas, Sara Lafuerza, Fukashi Maeno, Michael Manga, Michael Martínez-Colón, James McManus, Sally Morgan, Takeshi Saito, Angela L. Slagle, K.S.V. Subramanyam, Yoshihiko Tamura, J. Trofimovs, Benoı̂t Villemant, F. Wang, Expedition 340 Scientists
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Abstract
This data report focuses on Holes U1394B, U1395B, and U1396C located offshore Montserrat.These holes were drilled during Integrated Ocean Drilling Program Expedition 340 and contain deposits associated with the growth and decay of the volcanic island of Montserrat.Hole U1394B dates to ~353 ka and is composed of 17 bioclastic turbidites, 24 mixed turbidites, 55 volcaniclastic turbidites, and 32 tephra fall layers within a background stratigraphy of hemipelagic marine mud.Hole U1395B dates to older than 1 Ma and contains 18 bioclastic turbidites, 27 mixed turbidites, 43 volcaniclastic turbidites, and 52 tephra fall layers.The uppermost 7 m of Hole U1396C covers ~1 My of stratigraphy and contains 1 bioclastic turbidite, 1 mixed turbidite, 9 volcaniclastic turbidites, and 13 tephra fall layers.Tephra fall and some volcaniclastic deposits are associated with episodes of island building, whereas bioclastic turbidites, mixed turbidites, and some volcaniclastic turbidites are associated with large landslide events from Montserrat.Integrated Ocean Drilling Program (IODP) Expedition 340 in 2012 provided some of the few long cores from offshore oceanic volcanic islands (>1 Ma) and the first that penetrated through major submarine landslide deposits (Le Friant et al., 2012, 2015).During the Expedition a total of nine sites were drilled offshore Montserrat, Martinique, and Dominica in the Lesser Antilles (Expedition 340 Scientists, 2012) (Fig. F1).
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