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首页> 外文期刊>Journal of Asian earth sciences >Paleomagnetism of the Permian-Triassic intrusions from the Norilsk region (the Siberian platform, Russia): Implications for the timing and correlation of magmatic events, and magmatic evolution
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Paleomagnetism of the Permian-Triassic intrusions from the Norilsk region (the Siberian platform, Russia): Implications for the timing and correlation of magmatic events, and magmatic evolution

机译：来自诺里尔斯克地区的二叠纪 - 三叠纪入侵的古磁体 - 对岩浆事件的时序和相关性的影响，对岩浆进化的同步和相关性的影响

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摘要

The Norilsk region is a key area within the Siberian Traps Large Igneous Province, due to the thickest sections of the Permian-Triassic extrusive rocks and high diversity of intrusions and volcanics in composition. The unique Cu-Ni-PGE deposits related to the Siberian Traps intrusions are present here. On the basis of the new representative paleomagnetic and geochemical data, we distinguished three stages of intrusive magmatic activity. At the initial stage, high-Ti trachydolerites of the Yergalakhsky complex were emplaced synchronously with the lower part of the Norilsk volcanic section. The middle stage was manifested by emplacement of ore-bearing intrusions of the Norilsk type, leucogabbro of the Kruglogorsky type, and barren gabbro-dolerites of the Oganer complex, coeval with the Morongovsky and Mokulaevsky volcanic formations (about 251.8-251.6 Ma). At this stage, magmatic activity occurred as a series of brief and powerful events. Finally, the terminal stage is represented by geochemically contrasting dikes of the Avamsky and Daldykan complexes, cutting the entire volcanic section of the Norilsk region.Our new paleomagnetic results together with U-Pb show that the Permian-Triassic boundary in the Norilsk volcanic section should be set at the base of the Morongovsky Formation (the middle part of the Norilsk tuff-lava pile), and the duration of volcanic activity after this boundary can be estimated as similar to 0.5 Myr.
机译：诺里尔斯克地区是西伯利亚陷阱中的一个关键区域，它是大火省的巨大的石油省，由于二叠系三叠系胶岩的最大部分和组合物中的侵入性和火山岩。这里存在与西伯利亚陷阱入侵相关的独特的Cu-Ni-PGE沉积物。在新的代表性古磁性和地球化学数据的基础上，我们介绍了三个侵扰性岩石活动的阶段。在初始阶段，Yergalakhsky综合体的高Ti曲晶晶体与Norilsk火山部分的下部同步施加。中期阶段表现出诺尔氏型型，克鲁格洛戈鸽型的白杨型侵入型矿石侵入，并禁止Oganer综合体的贫瘠Gabbro-dolerites，与Morongovsky和Mokulaevsky火山形成（约251.8-251.6 mA）。在这个阶段，Magmatic活动发生作为一系列简短和强大的事件。最后，终端阶段由Avamsky和Daldykan复合物的地球化学对比的堤坝表示，切割Norilsk地区的整个火山部分。新的古磁性结果与U-Pb一起表明，Norilsk火山部分的二叠系三叠系边界应该设定在Morongovsky地层的基础（Norilsk Tuff-Lava桩的中间部分），并且在该边界后的火山活度的持续时间可以估计与0.5 myR相似。

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  • 来源
    《Journal of Asian earth sciences》 |2021年第1期|104858.1-104858.22|共22页
  • 作者

    Latyshev Anton; Krivolutskaya Nadezhda; Ulyakhina Polina; Fetisova Anna; Veselovskiy Roman; Pasenko Alexander; Khotylev Alexey; Anosova Maiia;

  • 作者单位

    Lomonosov Moscow State Univ Fac Geol 1 Leninskie Gory Moscow 119991 Russia|Russian Acad Sci Schmidt Inst Phys Earth 10 Bolshaya Gruzinskaya St Moscow 123242 Russia;

    Russian Acad Sci Vernadsky Inst Geochem & Analyt Chem 19 Kosygina St Moscow 119991 Russia;

    Closed Joint Stock Co Modeling & Monitoring Geol 21 B-1 Enthuziastov Moscow 111024 Russia;

    Lomonosov Moscow State Univ Fac Geol 1 Leninskie Gory Moscow 119991 Russia|Russian Acad Sci Schmidt Inst Phys Earth 10 Bolshaya Gruzinskaya St Moscow 123242 Russia;

    Lomonosov Moscow State Univ Fac Geol 1 Leninskie Gory Moscow 119991 Russia|Russian Acad Sci Schmidt Inst Phys Earth 10 Bolshaya Gruzinskaya St Moscow 123242 Russia;

    Russian Acad Sci Schmidt Inst Phys Earth 10 Bolshaya Gruzinskaya St Moscow 123242 Russia;

    Lomonosov Moscow State Univ Fac Geol 1 Leninskie Gory Moscow 119991 Russia;

    Lomonosov Moscow State Univ Fac Geol 1 Leninskie Gory Moscow 119991 Russia;

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  • 正文语种 eng
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  • 关键词

    The Siberian Traps; Large Igneous Province; Paleomagnetism; Permian-Triassic boundary; Norilsk region; Secular geomagnetic variations;

    机译：西伯利亚陷阱;大的火成岩省;古磁石;二叠纪 - 三叠纪边界;诺里尔斯克地区;世俗地磁变化;

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