Large igneous provinces (LIPs) typically form in one short pulse of ~1–5 Ma or several punctuated ~1–5 Ma pulses. Here, our 25 new 40Ar/39Ar plateau ages for the main construct of the Kerguelen LIP—the Cretaceous Southern and Central Kerguelen Plateau, Elan Bank, and Broken Ridge—show continuous volcanic activity from ca. 122 to 90 Ma, a long lifespan of >32 Ma. This suggests that the Kerguelen LIP records the longest, continuous high-magma-flux emplacement interval of any LIP. Distinct from both short-lived and multiple-pulsed LIPs, we propose that Kerguelen is a different type of LIP that formed through long-term interactions between a mantle plume and mid-ocean ridge, which is enabled by multiple ridge jumps, slow spreading, and migration of the ridge. Such processes allow the transport of magma products away from the eruption center and result in long-lived, continuous magmatic activity.

中文翻译：

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由羽脊相互作用驱动的最长连续喷发火成岩省

大型火成岩省 (LIP) 通常由一个约 1-5 Ma 的短脉冲或几个间断的约 1-5 Ma 脉冲形成。在这里，我们的 25 个新的 40Ar/39Ar 高原年龄为凯尔盖朗 LIP 的主要构造——白垩纪南部和中部凯尔盖朗高原、埃兰海岸和断脊——显示了大约从 122~90 Ma，寿命>32 Ma。这表明 Kerguelen LIP 记录了任何 LIP 中最长的、连续的高岩浆通量侵位间隔。与短寿命和多脉冲 LIP 不同，我们提出 Kerguelen 是一种不同类型的 LIP，它是通过地幔柱和大洋中脊之间的长期相互作用形成的，它是由多次脊跳跃、缓慢扩散、和山脊的迁移。