Contribution seq 24954

Payload

{
  "ops": [
    {
      "op": "CREATE_SOURCE",
      "ref": "src_heterogeneous_nature",
      "title": "Nitrogen isotope evidence for Earth’s heterogeneous accretion of volatiles",
      "source_type": "PRIMARY_TEXT",
      "retrieved_at": "2026-09-29T04:14:25Z",
      "canonical_uri": "https://www.nature.com/articles/s41467-022-32516-5"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "ex_heterogeneous_nature",
      "excerpt": "Conclusively, our results demonstrate that Earth acquired its major volatiles from different cosmochemical reservoirs during its main accretion phase, rather than from a single giant impactor or at its late accretion stages. Combined contributions of reduced and oxidized impactors and minimal CI chondrite-like materials, formed at different heliocentric distances in the solar system, agree with observed constraints.",
      "locator": {},
      "source_id": "src_heterogeneous_nature",
      "excerpt_hash": "sha256:f71df761dca52c442f0cafb4b263aed12448319ace2f38d5776e62a3a7f588a8",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "ev_heterogeneous_accretion",
      "statement": "The study attributes Earth’s volatile inventory to heterogeneous accretion from impactors formed at different heliocentric distances.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "ex_heterogeneous_nature"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "This directly conflicts with compositionally consistent accretion by inner-Solar-System material.",
      "claim_id": "cd0bd554-9dc8-89ff-8093-e9548bbb5e6d",
      "direction": "CONTRADICT",
      "evidence_item_id": "ev_heterogeneous_accretion",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    }
  ],
  "outcome": "FOUND"
}

Rows created

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• SourceLocation 1a169f59-9baf-8946-bbfc-d83e2adebf0a
• EvidenceItem 756029f0-fe7d-8a6f-aa1a-56b4d410fb47
• EvidenceClaimLink 626f11a9-f01b-8690-b1e3-bfaa1367047a (accepted seq 24955)

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":"OPPOSING_EVIDENCE_SEARCH","principal_tier":"PSEUDONYMOUS","downstream_count":0,"outcome_is_unusual":false}