NDLI: Characterizing water/rock interaction in simulated comet nuclei via calorimetry: tool for in-situ science, laboratory analysis, and sample preservation

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Characterizing water/rock interaction in simulated comet nuclei via calorimetry: tool for in-situ science, laboratory analysis, and sample preservation

Content Provider	NASA Technical Reports Server (NTRS)
Author	Allton, Judith H. Gooding, James L.
Copyright Year	1991
Description	Although results from the Giotto and Vega spacecraft flybys of comet P/Halley indicate a complex chemistry for both the ices and dust in the nucleus, carbonaceous chondrite meteorites are still regarded as useful analogs for the rocky components. Carbonaceous chondrites mixed with water enable simulation of water/rock interactions which may occur in cometary nuclei. Three general types of interactions can be expected between water and minerals at sub-freezing temperatures: heterogeneous nucleation of ice by insoluble minerals; adsorption of water vapor by hygroscopic phases; and freezing and melting point depression of liquid water sustained by soluble minerals. Two series of experiments were performed in a differential scanning calorimeter (DSC) with homogenized powders of the following whole-rock meteorites and comparison samples: Allende (CV3), Murchison (CM2), Orgueil (CI), Holbrook (L6), and Pasamonte (eucrite) meteorites as well as on peridotite (PCC-1, USGS), saponite (Sap-Ca-1, CMS), montmorillonite (STx-1, CMS), and serpentine (Franciscan Formation, California). Results are briefly discussed.
File Size	148347
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19910016669
Archival Resource Key	ark:/13960/t16m8546x
Language	English
Publisher Date	1991-01-01
Access Restriction	Open
Subject Keyword	Astrophysics Comets Peridotite Nucleation Montmorillonite Calorimeters Vapor Phases Meteoritic Composition Serpentine Ice Minerals Heat Measurement Water Vapor Melting Points Giotto Mission Heterogeneity Dust Adsorption Comet Nuclei Moisture Content 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	Article

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