| Titre | The Alpha-Mendeleev ridge, a large igneous province with continental affinities |
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| Auteur | Jackson, H R ;
Chian, D |
| Source | The 8th International Conference on Arctic Margins (ICAM VIII); GFF vol. 141, issue 4, 2019 p. 316-329, https://doi.org/10.1080/11035897.2019.1655789 |
| Image |  |
| Année | 2019 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20190581 |
| Éditeur | Taylor & Francis |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1080/11035897.2019.1655789 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Programme | Délimitation du plateau continental du Canada en vertu de la Convention des Nations Unies sur le droit de la mer (UNCLOS) |
| Diffusé | 2019 09 30 |
| Résumé | (disponible en anglais seulement)
The Alpha Ridge-Mendeleev Rise (AMR) is the major bathymetric feature in the Amerasia Basin of the Arctic Ocean. Its tectonic history is controversial due to
its remote location in ice covered waters making data acquisition difficult, resulting in the lack of diagnostic data. Analysis of the wide-angle reflection/refraction data based on the compressional waves (P-waves) from the AMR indicates that its
velocity/depth structure is typical of large igneous provinces (LIPs). LIPs can form on either oceanic or continental crust and can exhibit complex history of development. Here converted shear waves (S-wave) on the Alpha Ridge have been used to
calculate Poisson's ratios and many of measured values are within the felsic range in the upper crust. They are comparable to published S-waves from the Mendeleev Rise. They are also consistent with the results of Rayleigh-wave group-velocity
analysis that indicate the Alpha Ridge in adjacent northern Canada has an intermediate composition. Based on magnetics, pseudogravity and volumetric considerations the High Arctic Large Igneous Province (HALIP) most closely resembles the Kerguelen
Plateau, a LIP with a continental component. The geophysical characteristics of the AMR are compatible with a number of other LIPs that have continental affinities. A variety of offshore information from dredges and cores and onshore geological data
support continental fragments incorporated in the AMR. |
| Sommaire | (Résumé en langage clair et simple, non publié)
La dorsale Alpha Mendeleev dans l'océan Arctique fait partie d'une grande province ignée qui comprend les parties magmatiques adjacentes de
l'archipel Arctique canadien. Les grandes provinces ignées ont une histoire tectonique complexe. Cet article décrit les preuves du rôle de la croûte continentale dans le développement des dorsales. |
| GEOSCAN ID | 321904 |
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