NDLI: Water/rock interactions in experimentally simulated dirty snowball and dirty iceball cometary nuclei

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Water/rock interactions in experimentally simulated dirty snowball and dirty iceball cometary nuclei

Content Provider	NASA Technical Reports Server (NTRS)
Author	Allton, Judith H. Gooding, James L.
Copyright Year	1991
Description	In the dirty snowball model for cometary nuclei, comet-nucleus materials are regarded as mixtures of volatile ices and relatively non-volatile minerals or chemical compounds. Carbonaceous chondrite meteorites are regarded as useful analogs for the rocky component. To help elucidate the possible physical geochemistry of cometary nuclei, preliminary results are reported of calorimetric experiments with two-component systems involving carbonaceous chondrites and water ice. Based on collective knowledge of the physics of water ice, three general types of interactions can be expected between water and minerals at sub-freezing temperatures: (1) heterogeneous nucleation of ice by insoluble minerals; (2) adsorption of water vapor by hygroscopic phases; and (3) freezing- and melting-point depression of liquid water sustained by soluble minerals. The relative and absolute magnitude of all three effects are expected to vary with mineral composition.
File Size	241035
Page Count	3
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19920001670
Archival Resource Key	ark:/13960/t9f52kc93
Language	English
Publisher Date	1991-06-01
Access Restriction	Open
Subject Keyword	Astrophysics Comets Water Nucleation Calorimeters Vapor Phases Solubility Meteoritic Composition Geochemistry Ice Minerals Water Vapor Melting Points Freezing Fluid-solid Interactions Interstellar Chemistry Comet Nuclei Astronomical Models Chemical Composition Carbonaceous Chondrites Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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