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Hydrated Salt Minerals on Ganymede's Surface: Evidence of an Ocean Below

Thomas B. McCord, Gary B. Hansen, and Charles A. HibbittsAuthors Info & Affiliations
Science
25 May 2001
Vol 292, Issue 5521
pp. 1523-1525
DOI: 10.1126/science.1059916
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Abstract

Reflectance spectra from Galileo's near-infrared mapping spectrometer (NIMS) suggests that the surface of Ganymede, the largest satellite of Jupiter, contains hydrated materials. These materials are interpreted to be similar to those found on Europa, that is, mostly frozen magnesium sulfate brines that are derived from a subsurface briny layer of fluid.

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We thank F. Fanale and R. Pappalardo for helpful comments. Supported by NASA grants NAG5-10514, NAG5-8983, and JPL-960443. This is University of Hawaii publication no. 1145 (HIGP) and 5470 (SOEST).
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Information & Authors

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Published In

Science
Volume 292 | Issue 5521
25 May 2001

Submission history

Received: 15 February 2001
Accepted: 19 April 2001
Published in print: 25 May 2001

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Authors

Affiliations

Thomas B. McCord*
Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, Hawaii.
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Gary B. Hansen
Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, Hawaii.
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Charles A. Hibbitts
Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, Hawaii.
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Notes

*
To whom correspondence should be addressed. E-mail: [email protected]

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  • Thomas B. McCord et al.
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Hydrated Salt Minerals on Ganymede's Surface: Evidence of an Ocean Below.Science292,1523-1525(2001).DOI:10.1126/science.1059916

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