Massive methane fluxing from magma-sediment interaction in the end-Triassic Central Atlantic Magmatic Province.
Massive methane fluxing from magma-sediment interaction in the end-Triassic Central Atlantic Magmatic Province.
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DOI：
10.1038/s41467-021-25510-w
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发表时间：
2021-09-20
影响因子：
16.6
通讯作者：
Szabó C
中科院分区：
文献类型：
--
作者：
Capriolo M;Marzoli A;Aradi LE;Ackerson MR;Bartoli O;Callegaro S;Dal Corso J;Ernesto M;Gouvêa Vasconcellos EM;De Min A;Newton RJ;Szabó C
异常的岩浆事件与地球历史上最大规模的物种灭绝同时发生。岩浆侵入的富含有机物沉积物的大量脱气可能是灾难性环境变化的驱动因素，从而引发了生物危机。地球上最大的岩浆事件之一以大西洋中部岩浆省为代表，它与三叠纪末期的大规模灭绝同步。在这里，我们展示了玄武岩岩浆中存在甲烷的直接证据，这些甲烷是在这个大型火成岩省的侵位过程中从宿主沉积序列中产生或重新活化的。在巴西亚马逊流域的大量（约1.0 × 106 km3）侵入岩浆岩浆结晶结束时，大量富含甲烷的流体包裹体被包裹在石英内，表明存在大量（约7.2 × 103 Gt）的甲烷通量。石英晶体中这些微米级的缺陷证明了岩浆-沉积物相互作用中甲烷的大量释放，这可能导致了全球气候变化，导致了三叠纪末期的大规模灭绝。温室气体大量排放引发的全球气候变化导致了地球过去的大规模灭绝。在这里，作者表明，三叠纪末大灭绝时甲烷的广泛释放是由大型火成岩省与沉积主岩的相互作用引起的。
Exceptional magmatic events coincided with the largest mass extinctions throughout Earth’s history. Extensive degassing from organic-rich sediments intruded by magmas is a possible driver of the catastrophic environmental changes, which triggered the biotic crises. One of Earth’s largest magmatic events is represented by the Central Atlantic Magmatic Province, which was synchronous with the end-Triassic mass extinction. Here, we show direct evidence for the presence in basaltic magmas of methane, generated or remobilized from the host sedimentary sequence during the emplacement of this Large Igneous Province. Abundant methane-rich fluid inclusions were entrapped within quartz at the end of magmatic crystallization in voluminous (about 1.0 × 106 km3) intrusions in Brazilian Amazonia, indicating a massive (about 7.2 × 103 Gt) fluxing of methane. These micrometre-sized imperfections in quartz crystals attest an extensive release of methane from magma–sediment interaction, which likely contributed to the global climate changes responsible for the end-Triassic mass extinction. Global climate changes triggered by massive output of greenhouse gases led to mass extinctions in Earth’s past. Here, the authors show that widespread release of methane at the time of the end-Triassic mass extinction was caused by interaction of a Large Igneous Province with sedimentary host-rocks.
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影响因子：
12.1
作者：
Baker, D. R.;Alletti, M.
通讯作者：
Alletti, M.
DOI：
10.1016/j.palaeo.2017.03.014
发表时间：
2017-07-15
影响因子：
3
作者：
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通讯作者：
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影响因子：
5.3
作者：
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通讯作者：
Planke, Sverre
影响因子：
3.9
作者：
Gualda, Guilherme A. R.;Ghiorso, Mark S.;Carley, Tamara L.
通讯作者：
Carley, Tamara L.
影响因子：
4.5
作者：
Black, Benjamin A.;Gibson, Sally A.
通讯作者：
Gibson, Sally A.