Geotechnical properties of select convergent margin sediments.
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| Other Authors: | , , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1981.
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| Subjects: | |
| Online Access: | Link to ProQuest Copy Link to OAKTrust copy |
| Abstract: | Geotechnical property analyses on sediments recovered by DSDP drilling on select convergent margins were integrated to determine the variability in these properties along the lower trench inner slope and to delineate the effects of convergence on these properties. Consolidation states range from very underconsolidated to highly overconsolidated with preconsolidation pressures exceeding 46,000 kPa in Quaternary sediments. Underconsolidated sediments are attributed to high sedimentation rates, low sediment permeability relative to the length of the drainage path, laterally applied stresses, induced pore pressures resulting from the subduction of high water content pelagic sediments and physicochemical interparticle bonding. Factors contributing to the state of overconsolidation include tectonically induced overpressures, removal of overburden by mass movement processes, low sediment accumulation rates, and great age. Vertical gradients of index properties also vary greatly with the maximum gradient associated with overconsolidated sediments. Values of porosity exceed 30% at all margins studied suggesting this represents the minimum value attainable solely by the effects of convergence. ... |
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| Item Description: | "Major subject: Oceanography." Typescript (photocopy). Vita. |
| Physical Description: | xv, 168 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references (leaves 158-167). |