Earth Sciences

Jarosite formation in deep Antarctic ice provides a window into acidic, water-limited weathering on Mars

G. Baccolo, B. Delmonte, et al.

Discover how jarosite, a ferric-potassium hydroxide sulfate found in Martian sediments, has been identified within deep Antarctic ice. This remarkable study, conducted by Giovanni Baccolo, Barbara Delmonte, P. B. Niles, and others, reveals the intriguing interaction between aeolian dust and atmospheric aerosols, shedding light on the geological importance of paleo-ice processes on Mars.

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Abstract

Jarosite, a ferric-potassium hydroxide sulfate, has been found in Martian surficial sediments. This study reports the discovery of jarosite within deep Antarctic ice, formed through the interaction of aeolian dust and acidic atmospheric aerosols. This englacial diagenetic mechanism supports the ice-weathering model for jarosite formation on Mars, highlighting the geological importance of paleo-ice processes on the planet. The findings have implications for paleoclimatic reconstructions and the englacial history of Antarctic meteorites.

Publisher

Nature Communications

Published On

Jan 19, 2021

Authors

Giovanni Baccolo, Barbara Delmonte, P. B. Niles, Giannantonio Cibin, Elena Di Stefano, Dariush Hampai, Lindsay Keller, Valter Maggi, Augusto Marcelli, Joseph Michalski, Christopher Snead, Massimo Frezzotti

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