Deep Carbon and the Life Cycle of Large Igneous Provinces
Deep Carbon and the Life Cycle of Large Igneous Provinces
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DOI：
10.2138/gselements.15.5.319
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发表时间：
2019-10-01
期刊：
影响因子：
4.5
通讯作者：
Gibson, Sally A.
中科院分区：
文献类型：
--
作者：
Black, Benjamin A.;Gibson, Sally A.
碳对于大火成岩省（LIP）的形成和环境影响至关重要。这些巨大的岩浆事件发生在地质学上的短时间尺度上，包括大量的溢流玄武岩，沿着少量的碱性岩浆。在LIP侵位期间，从溢流玄武岩中释放的CO2平均每年可达3，000 Mt，并得到地壳深处分离岩浆的补贴。LIPs中大量的碳可能来自对流地幔、岩石圈地幔和地壳。每种潜在碳源的相对重要性知之甚少，并且可能在LIP之间变化。由于LIPs利用了在板块边界岩浆活动期间通常未开发的地幔储层，因此它们是地球长期碳循环的组成部分。
Carbon is central to the formation and environmental impact of large igneous provinces (LIPs). These vast magmatic events occur over geologically short timescales and include voluminous flood basalts, along with silicic and low-volume alkaline magmas. Surface outgassing of CO2 from flood basalts may average up to 3,000 Mt per year during LIP emplacement and is subsidized by fractionating magmas deep in the crust. The large quantities of carbon mobilized in LIPs may be sourced from the convecting mantle, lithospheric mantle and crust. The relative significance of each potential carbon source is poorly known and probably varies between LIPs. Because LIPs draw on mantle reservoirs typically untapped during plate boundary magmatism, they are integral to Earth's long-term carbon cycle.