Large-scale polymetallic mineralization driven by long-lived magmatic-hydrothermal activity and subducted sediment influx: A case study from Toyoha, NE Japan
Rattachement africain : gb, jp. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Although there is increasing recognition that long-lived magmatic-hydrothermal systems are essential components of large-scale mineralization, relatively little is known about the source processes that enable such activity, especially in areas of average crustal thickness. To address this issue, we investigated the sources of ore-forming elements and drivers of prolonged ore-forming activity (>1 million years) in the Toyoha polymetallic intermediate-sulfidation deposit, located at the northern end of the Northeast Japan Arc. We have presented Pb isotopic evidence that in the southeastern part of the deposit, where the hydrothermal activity lasted substantially longer (>1 million years) than the nearby (<10 km) volcanic activities, sulfide minerals from the ore had a specific metal source in addition to the wall rocks and the magmas observable as nearby extrusive rocks. The additional source was likely latent intrusions similar to the isotopically enriched volcanic rocks ~20 km southeast of the deposit, which incorporated abundant components from the subducting sediment. Based on regional geological, geochemical (major, trace elements and Sr-Nd-Pb isotopes) and geochronological data, we propose that seamount subduction induced the extra sediment input into the mantle wedge, which generated additional magma batches and helped to sustain magmatic-hydrothermal activity in the study area. The large tonnage, particularly of Pb, Zn, Ag, and In, in Toyoha was likely a result of the productive source, which enabled long-lived magmatic-hydrothermal activity, and an effective structure for the transport and trapping of ore-forming materials.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Large-scale polymetallic mineralization driven by long-lived magmatic-hydrothermal activity and subducted sediment influx: A case study from Toyoha, NE Japan
- Date Crossref
- 01/01/2026
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Natural History Museum pays non établi dans la noticeInstitution
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Kwansei Gakuin University pays non établi dans la noticeUniversité ou école supérieure
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The University of Tokyo Earthquake Research Institute pays non établi dans la noticeUniversité ou école supérieure
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Chiba Institute of Technology pays non établi dans la noticeUniversité ou école supérieure
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National Institute of Advanced Industrial Science and Technology pays non établi dans la noticeOrganisme public
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Association for the Development of Earthquake Prediction pays non établi dans la noticeStructure de recherche
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National Museum of Nature and Science pays non établi dans la noticeInstitution
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Graduate School of Engineering pays non établi dans la noticeUniversité ou école supérieure
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School of Biological and Environmental Sciences pays non établi dans la noticeUniversité ou école supérieure
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Ocean Resources Research Center for Next Generation pays non établi dans la noticeStructure de recherche
Natural History Museum, Kwansei Gakuin University et Earthquake Research Institute — The University of Tokyo, avec 7 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.