{
  "abstract": "The Sandmata Complex in the Aravalli orogen (NW India) preserves an extensive Paleoproterozoic geological record characterized by granulite-facies metamorphism, granitoid magmatism, and multiphase deformation. This study integrates structural, petrological, geochemical, and geochronological data to reconstruct the tectonomagmatic evolution of garnet-bearing granitoids and metamorphic history of the host gneisses in the Amet region. The gneisses record four deformation events (D 1 -D 4 ), whereas the granitoids preserve three deformation phases (D 1 -D 3 ). The D 2 -D 4 in gneisses correspond temporally D 1 -D 3 in the granitoids. Crystallographic preferred orientation (CPO) analyses of granitoids reveal a transition from monoclinic (S 1 ) to triclinic shear regimes (S 2 -S 3 ), indicating progressive noncoaxial deformation. Quartz CPO patterns record WNW-ESE-directed (D 1 ) and NE-SWdirected (D 2 -D 3 ) brittle-viscous shearing accompanied by dynamic recrystallization at 500-600 °C. The gneisses record syn-D 2 peak metamorphic conditions of 5.8-6.6 kbar, 660-680 °C. The Amet granitoids crystallized at 6.0-7.4 kbar, 730-775 °C, and contain inherited garnet cores (Grt-I) with peritectic rims (Grt-I rim) and matrix garnets (Grt-II). REE patterns and negative Eu anomalies in the pre-D 1 garnets indicate a two-stage growth history related to evolving melt composition and P-T conditions. U-Pb zircon dating constrains granitoid crystallization at ~1823 Ma. In-situ monazite geochronology records deformation events at ~1670 Ma (D 1 ) and ~949 Ma (D 2 -D 3 ), the latter representing an imprint of the Delhi Orogeny. These results indicate partial melting and magma emplacement, driven by long-lived subduction during the Aravalli orogeny. The findings of this study provide robust evidence of Paleoproterozoic magmatism and continent-scale collisions during ~2.1-1.8 Ga, highlighting the significance of Aravalli orogen in the assembly of the Columbia supercontinent.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "name": "Manisha Sahu"
    },
    {
      "name": "Anwesa Banerjee"
    },
    {
      "name": "Nathan Cogné"
    },
    {
      "name": "E Mariani"
    },
    {
      "name": "N Prabhakar"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5samt13608yzt.bib",
  "cited_by": 0,
  "doi": "10.1016/j.gsf.2026.102332",
  "fulltext_url": null,
  "id": "5samt13608yzt",
  "issns": [
    "1674-9871"
  ],
  "landing_url": "https://insu.hal.science/insu-05592111v2",
  "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.pe"
    ],
    [
      "openalex",
      "1908|Geological and Geochemical Analysis"
    ]
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  "openalex": "W7154158113",
  "pdf_url": "https://insu.hal.science/insu-05592111/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-02",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/5samt13608yzt.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:24Z",
      "native_id": "insu-05592111",
      "source": "hal",
      "url": "https://insu.hal.science/insu-05592111v2"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "hal:2.sdu.stu.pe",
      "subfield": "geology-geochemistry"
    }
  ],
  "title": "Tectono-magmatic evolution of the Amet granite-gneiss terrane, Sandmata Complex (NW India): Implications for Paleoproterozoic crustal accretion during Columbia assembly",
  "title_text": "Tectono-magmatic evolution of the Amet granite-gneiss terrane, Sandmata Complex (NW India): Implications for Paleoproterozoic crustal accretion during Columbia assembly",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:24Z",
  "url": "https://research.draconitic.com/paper/5samt13608yzt",
  "venue": "Geoscience Frontiers",
  "versions": []
}