Evidence item

The peer-reviewed study identifies at least three alteration episodes in the Margin unit. DIRECT_TEXT

Authenticity UNVERIFIED · extraction UNVERIFIED · independence group none (unreviewed) · created seq 14045

Source: Lake- and groundwater-associated alteration of the olivine-rich Margin unit in Jezero crater, Mars · locator {} · excerpt hash sha256:f7de17cd36bea632363b0654f81266fdcdbe1c55112b7b0057f3ff181f5b2e6c

Exact excerpt

Following emplacement, the Margin unit experienced at least three episodes of alteration: 1) neutral-to-alkaline, CO2-rich meteoric fluids formed carbonate-rich fracture fill that later eroded into ridges; 2) lower-pH solutions remobilized carbonate, driving secondary porosity generation and silica precipitation from cooler and/or silica-saturated fluids; and 3) late-stage hydrothermal fluids flowed through younger fractures, precipitating Ca-sulfate-rich and fluorite-bearing mineral veins.

Linked claims

Claim	Direction	Relevance	Steps	Counted
0aee692c	SUPPORT	DIRECT	0	yes

Audits

None.