{
  "abstract": "Understanding the multiscale mechanical behavior of clay-rich rocks is critical for assessing fault reactivation and the long-term integrity of underground waste repositories. This study investigates the evolution of microdeformation in Tournemire's shale samples under compressive stress by integrating high-resolution imaging (from an environmental scanning electron microscope) with ultrasonic P-wave velocity measurements. Our results demonstrate that deformation initiates through shear along pre-existing, inclined clay-rich bands around clasts. These heterogeneities, inherited from diagenesis, control strain localization that triggers the dilatancy onset. We show that these structural changes significantly alter the magnitude and direction of P-wave velocities, providing a direct link between microstructural damage and elastic anisotropy.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "name": "Matthieu Lusseyran"
    },
    {
      "name": "Audrey Bonnelye"
    },
    {
      "name": "Alexandre Dimanov"
    },
    {
      "name": "Alexandre Tanguy"
    },
    {
      "name": "Pierre Dick"
    },
    {
      "name": "Jérôme Fortin"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9dk1nejrbjp9v.bib",
  "cited_by": 0,
  "doi": "10.1029/2025gl120970",
  "fulltext_url": null,
  "id": "9dk1nejrbjp9v",
  "issns": [
    "0094-8276",
    "1944-8007"
  ],
  "landing_url": "https://hal.science/hal-05761080v1",
  "language": "en",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.sdu"
    ],
    [
      "hal",
      "1.sdu.stu"
    ],
    [
      "hal",
      "2.sdu.stu.gp"
    ],
    [
      "openalex",
      "2211|Rock Mechanics and Modeling"
    ]
  ],
  "openalex": "W7202089578",
  "pdf_url": "https://hal.science/hal-05761080/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-10",
  "publisher": "American Geophysical Union",
  "ris": "https://research.draconitic.com/paper/9dk1nejrbjp9v.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:39Z",
      "native_id": "hal-05761080",
      "source": "hal",
      "url": "https://hal.science/hal-05761080v1"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "hal:2.sdu.stu.gp",
      "subfield": "geophysics"
    }
  ],
  "title": "Evolution of P‐wave Anisotropy as an Indicator of Pre‐failure Deformation in Shale",
  "title_text": "Evolution of P‐wave Anisotropy as an Indicator of Pre‐failure Deformation in Shale",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:39Z",
  "url": "https://research.draconitic.com/paper/9dk1nejrbjp9v",
  "venue": "Geophysical Research Letters",
  "versions": []
}