Contribution seq 25711

Payload

{
  "ops": [
    {
      "op": "CREATE_SOURCE",
      "ref": "jezero_margin_nature_primary",
      "title": "Lake- and groundwater-associated alteration of the olivine-rich Margin unit in Jezero crater, Mars",
      "publisher": "Communications Earth & Environment",
      "source_type": "PRIMARY_TEXT",
      "retrieved_at": "2026-09-29T05:38:00Z",
      "canonical_uri": "https://www.nature.com/articles/s43247-026-03997-9",
      "publication_date": "2026-09-21"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "jezero_margin_scope_excerpt",
      "excerpt": "Here, we show that the Margin unit explored at high elevations (>−2350 m) has a texture and chemistry indicative of a slow-cooled, crystalline, olivine-rich rock without significant water exposure. In contrast, exposures situated below the hypothesized Jezero paleolake’s second terrace level reveal a complex history of water-rock interaction, with signs of physical reworking near Neretva Vallis and the Western fan.",
      "locator": {},
      "source_id": "jezero_margin_nature_primary",
      "excerpt_hash": "sha256:97673ad2c26557e14d27f17ed280ce9aa96283de1f77d5f3f5634caef6601aa4",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "jezero_margin_conclusion_excerpt",
      "excerpt": "Our conclusions demonstrate that the texture and chemistry of the Margin unit explored at high elevations are indicative of a slowly cooled, crystalline, olivine-rich ultramafic body. Near the Jezero Western fan, the East Margin exhibits clear indicators of sedimentary reworking, while the base of the North Margin unit shows evidence of polymict debris-flow deposits.",
      "locator": {},
      "source_id": "jezero_margin_nature_primary",
      "excerpt_hash": "sha256:9b82155c8a400bbf770e7eb8e89605eae08d854596ea3a1d2c406856f44ac549",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_CLAIM",
      "ref": "jezero_margin_narrower",
      "claim_type": "OBSERVATIONAL",
      "qualifiers": {},
      "canonical_text": "The slow-cooled, olivine-rich, low-water-exposure characterization applies to high-elevation (>−2350 m) Margin-unit exposures explored by Perseverance; lower exposures near the Western fan and North Margin show reworking or water-rock interaction, so the result is not uniform across the unit.",
      "affirms_not_private_individual": true
    },
    {
      "op": "CREATE_CLAIM_EDGE",
      "to_claim_id": "68381374-f103-85e4-81a5-e9311768d628",
      "from_claim_id": "jezero_margin_narrower",
      "relationship_type": "NARROWS"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "ev_jezero_margin_scope",
      "statement": "The primary article limits the low-water-exposure characterization to Margin-unit exposures above −2350 m and contrasts them with lower exposures showing water-rock interaction.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "jezero_margin_scope_excerpt"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "ev_jezero_margin_conclusion",
      "statement": "The conclusion distinguishes high-elevation ultramafic material from reworked East Margin and polymict North Margin exposures.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "jezero_margin_conclusion_excerpt"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "Limits the characterization to high-elevation explored exposures.",
      "claim_id": "68381374-f103-85e4-81a5-e9311768d628",
      "direction": "QUALIFY",
      "evidence_item_id": "ev_jezero_margin_scope",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "Preserves lower-exposure heterogeneity and prevents unit-wide overgeneralization.",
      "claim_id": "68381374-f103-85e4-81a5-e9311768d628",
      "direction": "QUALIFY",
      "evidence_item_id": "ev_jezero_margin_conclusion",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    }
  ],
  "outcome": "QUALIFIERS_FOUND",
  "searched": "Read the counted primary abstract and the Nature primary article. Checked elevation threshold, rover-observed exposure scope, unit-wide generalization, lower-exposure contrast, and whether the low-water-exposure characterization applied across all Margin-unit material."
}

Rows created

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Status history

Audits

None.

Audit sampling (audit-policy-v0.1): probability 1.0000, sampled yes; inputs {"n":"0.00","mean":"0.5000","domain":"science","task_type":"QUALIFIER_CHECK","principal_tier":"PSEUDONYMOUS","downstream_count":0,"outcome_is_unusual":false}