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首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >4D Arctic: A Glimpse into the Structure and Evolution of the Arctic in the Light of New Geophysical Maps, Plate Tectonics and Tomographic Models
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4D Arctic: A Glimpse into the Structure and Evolution of the Arctic in the Light of New Geophysical Maps, Plate Tectonics and Tomographic Models

机译：4D北极：根据新的地球物理图，板块构造和断层摄影模型了解北极的结构和演化

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摘要

Knowledge about the Arctic tectonic structure has changed in the last decade as a large number of new datasets have been collected and systematized. Here, we review the most updated, publicly available Circum-Arctic digital compilations of magnetic and gravity data together with new models of the Arctic’s crust. Available tomographic models have also been scrutinized and evaluated for their potential to reveal the deeper structure of the Arctic region. Although the age and opening mechanisms of the Amerasia Basin are still difficult to establish in detail, interpreted subducted slabs that reside in the High Arctic’s lower mantle point to one or two episodes of subduction that consumed crust of possibly Late Cretaceous-Jurassic age. The origin of major igneous activity during the Cretaceous in the central Arctic (the Alpha-Mendeleev Ridge) and in the proximity of rifted margins (the so-called High Arctic Large Igneous Province—HALIP) is still debated. Models of global plate circuits and the connection with the deep mantle are used here to re-evaluate a possible link between Arctic volcanism and mantle plumes.
机译：在过去的十年中，随着大量新数据集的收集和系统化，对北极构造结构的了解发生了变化。在这里，我们将对磁性和重力数据的最新公开发行的Circum-Arctic数字汇编以及北极地壳的新模型进行回顾。还对可用的层析成像模型进行了仔细检查，并评估了它们的潜力，以揭示北极地区的深层结构。尽管仍然难以详细建立美国洋盆地的年龄和开放机制，但位于北极高地幔下部的俯冲俯冲平板指向一两次俯冲，消耗了白垩纪至侏罗纪晚期的地壳。关于北极中部白垩纪（阿尔法-门捷列夫岭）和裂谷边缘附近（所谓的高北极大火成岩省—HALIP）主要火成活动的起源仍存在争议。这里使用全球板块电路模型以及与深地幔的联系来重新评估北极火山作用和地幔柱之间的可能联系。

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