{
  "abstract": "The Mid-Atlantic Ridge (MAR) between the Marathon and Vema Transform Faults exhibits contrasting tectono-magmatic domains shaped by transform faults, non-transform discontinuities, and detachment faults. This study analyzes the 11 • N and 12 • N supersegments using high-resolution multibeam bathymetry and crustalthickness estimates from filtered RMBA inversion. We examine how variations in crustal thickness and lithospheric structural configuration along the ridge axis relate to segmentation by non-transform discontinuities and to morphological asymmetries at ridge-transform intersections in this sector of the MAR. The 11 • N supersegment, divided into the 11 • 55′N and 11 • 20′N segments, shows stronger tectonic segmentation than the 12 • N supersegment, with enhanced along-axis structural relief and locally rugged axial-valley morphologies. These characteristics are associated with asymmetric faulting patterns consistent with spatially variable tectonic extension and spatially discontinuous volcanic features. In contrast, the 12 • N supersegment shows segment-scale crustal-thickness maxima concentrated near the axial domain, while superficial volcanic expression is less continuously developed near the major discontinuities, consistent with increased tectonic accommodation in those areas. Detachment-related terrains are preferentially concentrated near ridge-transform intersections and non-transform discontinuities. In this supersegment, higher crustal-thickness estimates are concentrated within the axial domain and segment center, whereas domains adjacent to RTIs and NTDs are characterized by detachment-related terrains and reduced continuity of surficial volcanic construction. At the ridge-transform intersections, contrasting behaviors are observed. The Marathon ridge-transform intersection, located at the northern end of the 12 • N supersegment, exhibits limited recent volcanic expression and short-lived and spatially restricted faulting. In contrast, the Vema RTI, at the southern end of the 11 • N supersegment, is dominated by extensive detachment faulting and a prominent massif, consistent with a more mature detachment-dominated configuration. Overall, the contrasting segmentation of the 11 • N and 12 • N supersegments reflects systematic along-axis variations in magmatic contribution and lithospheric structural configuration, particularly near ridge-transform intersections and non-transform discontinuities.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "name": "Patrícia Reis Alencar Oliveira"
    },
    {
      "name": "Márcia Maia"
    },
    {
      "name": "Moab Paxedes Gomes"
    },
    {
      "name": "Heliásio Augusto Simões"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/exr9ydvjej56g.bib",
  "cited_by": 0,
  "doi": "10.1016/j.margeo.2026.107768",
  "fulltext_url": null,
  "id": "exr9ydvjej56g",
  "issns": [
    "0025-3227"
  ],
  "landing_url": "https://hal.science/hal-05848549v1",
  "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"
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      "hal",
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      "openalex",
      "1907|Geological and Geophysical Studies"
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  "openalex": "W7152511250",
  "pdf_url": "https://hal.science/hal-05848549/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-02",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/exr9ydvjej56g.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:17Z",
      "native_id": "hal-05848549",
      "source": "hal",
      "url": "https://hal.science/hal-05848549v1"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "hal:2.sdu.stu.gm",
      "subfield": "geology-geochemistry"
    },
    {
      "field": "earth",
      "origin": "hal:2.sdu.stu.gp",
      "subfield": "geophysics"
    }
  ],
  "title": "The magmatic and tectonic role in spreading styles at ridge–transform intersections between the Marathon and Vema Transform Faults",
  "title_text": "The magmatic and tectonic role in spreading styles at ridge–transform intersections between the Marathon and Vema Transform Faults",
  "type": "peer-reviewed",
  "updated_at": "2026-11-04T12:20:48Z",
  "url": "https://research.draconitic.com/paper/exr9ydvjej56g",
  "venue": "Marine Geology",
  "versions": []
}