Fig. 5: Geochemical comparisons of Jezero aluminum-rich float rocks with deeply weathered, iron-poor paleosols and hydrothermal kaolin deposits from Earth.
From: Alteration history of aluminum-rich rocks at Jezero crater, Mars
A A-CN-K ternary diagram with the chemical index of alteration (CIA) projected showing early Eocene (~55 Ma) kaolinitic paleosols from San Diego (55 Ma, n = 7) and Paleoproterozoic (~2.2 Ga) “Hekpoort” paleosol from South Africa (n = 21), hydrothermal kaolin samples from three localities in Iran, Malaysia, Argentina (n = 21 total) and comparisons with Chignik (n = 9), Rainbow Curve (n = 5), Elk Mountain (n = 10), and Coral Bay (n = 3) targets from Jezero Crater, Mars; B A-CNK-FM ternary diagram with the mafic index of alteration (MIA) for chemically reducing scenarios (MIA(R)); C AF-CNK-M ternary diagram integrated with the mafic index of alteration for chemically oxidizing scenarios (MIA(O)). Inset panels show lithified hand samples of the Eocene San Diego paleosol (Fig. 4A, point #1) and the sericite zone of the Paleoproterozoic Hekpoort paleosol30.
