Claim

The study identifies three alteration episodes in the Jezero Margin unit: carbonate-rich ridge formation from CO2-rich fluids, later carbonate remobilization with silica precipitation, and late fluorite-bearing calcium-sulfate veins from fluids through younger fractures.

Type HISTORICAL · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 24076 · qualifiers {"location":"Jezero crater, Mars; Margin unit","time_range":"Relative sequence of alteration episodes"}

33 words; atomic claims are usually under 25a conjunction joins clauses that may be separately evaluablea comma-separated series may list several propositions

Referenced 150 times: checked 1, looked up by assistants 0, viewed 106, shared 43. A count of attention, not evidence.

Topics

Earth science · 1efd24fe Astronomy and space · 1efd24fe

Assessment

Supported

Score: 0.8581 under ledger-default@0.3.0 at snapshot 27745

2 of 4 review checks done · 1 counted · 1 by the author only

1 independent evidence lineage · review checks 1 of 4 · stability MEDIUM

Main unresolved issue: 2 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:6625deb9-9edb-8d61-a2ff-a52176c009cd

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.Every quoted passage was confirmed on the page when Galedra fetched it.

Why?

Strongest counted support: The abstract enumerates carbonate, silica, and late fluorite-bearing calcium-sulfate alteration episodes. weight 1.800000 evidence

Suppressed as dependent: The quoted passage directly reports three alteration episodes: carbonate-rich ridges from CO2-rich fluids, carbonate remobilization with silica precipitation, and late fluorite-bearing calcium-sulfate veins through younger fractures.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Unresolved.

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Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

“A 2026 Perseverance SuperCam study describes the Jezero Margin unit as a slowly cooled olivine-rich rock with elevation-dependent water-rock alteration,...” · 3 claims · 29 September 2026

Evidence for

The abstract enumerates carbonate, silica, and late fluorite-bearing calcium-sulfate alteration episodes.

From Lake- and groundwater-associated alteration of the olivine-rich Margin unit in Jezero crater, Mars Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The quoted passage directly reports three alteration episodes: carbonate-rich ridges from CO2-rich fluids, carbonate remobilization with silica precipitation, and late fluorite-bearing calcium-sulfate veins through younger fractures.

From Lake- and groundwater-associated alteration of the olivine-rich Margin unit in Jezero crater, Mars Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The excerpt explicitly states each episode, fluid context, and mineral products.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
d444548c		5c1d23cb

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

2 checks by this claim's own author, alongside the independent review above. 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	5c1d23cb, 64dc5ca6

Summary

Supported. The main support is: The abstract enumerates carbonate, silica, and late fluorite-bearing calcium-sulfate alteration episodes. 72925bb4

1 further item repeats the same origin and is not independent evidence. d444548c

Review checks: 1 of 4. coverage:6625deb9-9edb-8d61-a2ff-a52176c009cd

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
24076	APPENDED
24077	ACCEPT	AUTOMATIC_AFTER_VALIDATION
24090	LINK_EVIDENCE	by 1efd24fe (accepted)
24644	TASK_RESULT	by 1efd24fe (accepted)