Chemical Gardens Under Mars Conditions: Imaging Chemical Garden Growth In Situ in an Environmental Scanning Electron Microscope Sainz Díaz, Claro Ignacio Escribano, Bruno Sánchez Almazo, Isabel María Cartwright, Julyan H. E. The authors acknowledge funding from Spanish MINCINN project grant FIS2016-77692-C2-2P along with European FEDER funds the European COST Action CA17120 supported by the EU Framework Programme Horizon 2020, and the PCIN-2017-098 project. 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. 2021-07-02T07:45:44Z 2021-07-02T07:45:44Z 2021-04-26 info:eu-repo/semantics/article Sainz-Díaz, C. I... [et al.] (2021). Chemical gardens under Mars conditions: Imaging chemical garden growth in situ in an environmental scanning electron microscope. Geophysical Research Letters, 48, e2021GL092883. [https://doi.org/10.1029/2021GL092883] http://hdl.handle.net/10481/69465 10.1029/2021GL092883 eng http://creativecommons.org/licenses/by-nc/3.0/es/ info:eu-repo/semantics/openAccess Atribución-NoComercial 3.0 España Wiley-Blackwell Publishing