Thermophysical, Rheological and Mechanical Measurements on Icy Compositions with Application to Solar System Ices

Details Thermophysical, Rheological and Mechanical Measurements on Icy Compositions with Application to Solar System Ices Thermophysical, Rheological and Mechanical Measurements on Icy Compositions with Application to Solar System Ices

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.p42b..06h&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #P42B-06

Physics

0770 Properties, 6020 Ices, 6063 Volcanism (5480, 8450)

Scientific paper

In this talk, we will discuss objectives and preliminary results for a research effort that uses a combined experimental and theoretical approach to: 1) determine fundamental physical properties of icy moon materials (ices and candidate cryomagmas) at small scales through cryogenic laboratory experiments; and 2) through modeling, extend these experimental results to explain observations at planetary length scales. These data will be used to help model the observed properties of planetary icy moons, in two important areas: 1) cryovolcanism; and 2) geophysical and tectonic processes, including mechanical response at tidal frequencies. New data from cryogenic laboratory experiments, on relevant icy systems, are needed to improve our ability to model these phenomena. Our experimental work will focus on three areas: 1) calorimetric studies of water-ice systems to construct relevant phase diagrams; 2) measurements of the bulk rheology (stress vs. strain rate) for cryovolcanic candidate fluids and mixed-phase (slurry) materials at different temperatures and crystal/solid fractions; and 3) mechanical property measurements (under compression) for solid specimens to obtain the Young's modulus at cryogenic temperatures. These experimental results will enable improved interpretations of the geophysical processes operant on Enceladus, Titan and Europa, i.e., crack propagation, crustal cycling, and band formation. This work was carried out at the Jet Propulsion Laboratory-California Institute of Technology, under contract to NASA.

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