Data report: Oedometer and triaxial tests of sediment from the Chile Triple Junction

Feeser, Volker and Brückmann, Warner (1995) Data report: Oedometer and triaxial tests of sediment from the Chile Triple Junction Proceedings of the Ocean Drilling Program: Scientific Results, 141 . pp. 407-416.

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Deep-sea sediments deposited at or near an actively spreading
mid-ocean ridge experience a distinctly different thermal history than
sediments deposited in other marine geotectonic settings. For sediments
of a given age the impact of high heat flow decreases with
increasing distance from the ridge. This simple relation is superimposed
in the active spreading ridge along the margin of Southern
Chile—the Chile Triple Junction—by the process of sediment accretion.
Both processes, heat flow and lateral thrusting, strongly modify
the mechanical behavior of sediment accreted.
The original intent was to study the mechanical state of accreted
sediment recovered during Ocean Drilling Program (ODP) Leg 141,
both unaltered and altered diagenetically by hydrothermal fluids, to
differentiate the effects of thermal and mechanical diagenesis. The
research program included high-pressure oedometer as well as triaxial
testing to quantify the relative importance of both diagenetic
processes for shear strength and consolidation behavior.
Unfortunately, whole-round core samples available from Leg 141
appeared to be inadequately preserved and only a limited number of
specimens could be used for mechanical testing. Therefore, most of
the pre-cruise goals could not be attained. This paper reports the
results of oedometer as well triaxial tests obtained from a restricted
testing program.

Document Type: Article
Keywords: Chile Triple Junction; ODP Leg 141; deep-sea sediments
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
Kiel University
Refereed: No
ISSN: 1096-7451
Projects: ODP
Date Deposited: 03 Mar 2016 09:47
Last Modified: 25 Oct 2016 12:06

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