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Meeteetse area, Bridger Basin, Lower Mt. Sharp, Aeolis Mons (Mount Sharp), Gale Crater, Aeolis quadrangle, Mars

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First record of a clear observation of fracture-associated Si-high diagenetic halos within the Murray fm. bedrock. Calcium sulfate veins with sharp transition between light- and dark-toned bedrock, among others (i.e., smooth transitions also observed in the area). The sharp transition was connected with (1) blocking the fluid responsible for diagenetic halos by the vein filling, or (2) veins being localized along mechanical boundaries between types of lithologies.

The area is suggested as a link between diagenesis of the Stimson fm. (at the Bridger Basin) and possible diagenesis of the Murray fm. (at Marias Pass). Thus, an ancient lake at the Gale Crater may be linked to sandstone by the same diagenetic process.

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References

Gasda, P.J., Frydenvang, J., Wiens, R.C., Grotzinger, J.P., Watkins, J.A., Stein, N., Edgett, K.S., Newsom, H., Clark, B., Anderson, R., Bridges, N., Clegg, S., Maurice, S., the MSL Team (2016): Potential link between high-silica diagenetic features in both eolian and lacustrine rock units measured in Gale Crater with MSL. 47th Lunar and Planetary Science Conference: pdf no. 1675

 
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