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Chemical Gardens Under Mars Conditions: Imaging Chemical Garden Growth In Situ in an Environmental Scanning Electron Microscope
Author(s) -
SainzDíaz C. Ignacio,
Escribano Bruno,
SánchezAlmazo Isabel,
Cartwright Julyan H. E.
Publication year - 2021
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2021gl092883
Subject(s) - mars exploration program , scanning electron microscope , environmental scanning electron microscope , astrobiology , metal , electron microscope , materials science , microscope , in situ , aluminium , earth (classical element) , mineralogy , geology , chemical engineering , chemistry , composite material , optics , metallurgy , physics , organic chemistry , engineering , mathematical physics
We have performed and visualized chemical garden growth experiments directly in situ in an environmental scanning electron microscope. The microscope chamber simulates the surface of Mars. We demonstrate that chemical gardens can form under the conditions of temperature and pressure existing on Mars in the presence of liquid water, silicates, and metal salts. Using chemical gardens from aluminum salts, tubes were formed where the external surface is formed principally by silicate and the inner surface is predominantly aluminum oxide‐hydroxide. It should thus be expected that similar growths of metal salts may be found in geological explorations of water‐rich environments during the search for life on Mars.