Geomechanical Characterization of Submarine Volcano-Flank Sediments, Martinique, Lesser Antilles Arc

  • Sara Lafuerza
  • Anne Le Friant
  • Michael Manga
  • Georges Boudon
  • Benoit Villemant
  • Nicole Stroncik
  • Barry Voight
  • Matt Hornbach
  • Osamu Ishizuka
Chapter
Part of the Advances in Natural and Technological Hazards Research book series (NTHR, volume 37)

Abstract

Onshore-offshore geophysical studies conducted on Martinique have identified major flank collapse events of Montagne Pelée that generated large submarine mass wasting deposits. Here, we evaluate the preconditioning factors involved in the deformation and failure of marine sediments related to volcano-flank collapse events. We use core logging, sedimentological and geotechnical data of the upper 200 m of core at sites U1397, U1398, U1399 and U1400 drilled during the Integrated Ocean Drilling Program (IODP) expedition 340, west of Martinique. We find that the low hydraulic conductivity of hemipelagic sediment causes low rates of dewatering of turbidites and tephra layers allowing excess pore fluid pressures to persist at depth. Overpressure generation was likely enhanced during major flank collapses, leading to low shear strength and subsequent deformation of large volumes of marine sediments, as found at Site U1400.

Keywords

Undrained shear strength Consolidation properties Overpressure Sediment deformation Volcano-flank collapse Martinique 

Notes

Acknowledgments

This research is based on shipboard data and core samples provided by IODP and is supported by the Institut de Physique du Globe de Paris. The authors thank University of Barcelona and M. Guart for use of laboratory facilities for grain size analyses. We thank J. Locat and N. Sultan for reviews.

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Sara Lafuerza
    • 1
  • Anne Le Friant
    • 1
  • Michael Manga
    • 2
  • Georges Boudon
    • 1
  • Benoit Villemant
    • 3
  • Nicole Stroncik
    • 4
  • Barry Voight
    • 5
  • Matt Hornbach
    • 6
  • Osamu Ishizuka
    • 7
  1. 1.Institut de Physique du Globe de Paris, Sorbonne Paris CitéUniv Paris Diderot, UMR 7154 CNRSParisFrance
  2. 2.Department of Earth and Planetary ScienceUniversity of CaliforniaBerkeleyUSA
  3. 3.Laboratoire de Petrologie, Geochimie, VolcanologieUniversity Pierre et Marie Curie-Paris 6, UMR 7193, ISTEPParisFrance
  4. 4.Department of Geology and GeophysicsTexas A & MCollege StationUSA
  5. 5.GeosciencesPenn State UniversityUniversity ParkUSA
  6. 6.Department of Earth SciencesSouthern Methodist UniversityDallasUSA
  7. 7.Geological Survey of JapanAISTTsukubaJapan

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