Deep pre-eruptive storage of silicic magmas feeding Plinian and dome-forming eruptions of central and northern Dominica (Lesser Antilles) inferred from volatile contents of melt inclusions
Deep pre-eruptive storage of silicic magmas feeding Plinian and dome-forming eruptions of central and northern Dominica (Lesser Antilles) inferred from volatile contents of melt inclusions
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DOI：
10.1007/s00410-018-1528-4
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发表时间：
2018-12-01
影响因子：
3.5
通讯作者：
Matjuschkin, V.
中科院分区：
文献类型：
--
作者：
Balcone-Boissard, H.;Boudon, G.;Matjuschkin, V.
挥发物有助于岩浆通过次火山管道系统上升。在这里，我们研究了多米尼加中部和北部（小安的列斯群岛弧）第四纪普林尼阶和圆顶形成的英安岩和安山岩喷发的主量元素和微量元素以及挥发物（H2O、CO2、SO2、F、Cl、Br、S）的熔体包裹体成分。存在于斜方辉石、单斜辉石和斜长石中的熔体包裹体始终是流纹岩。包埋后结晶效应有限，在斜方辉石包裹体中可以忽略不计。熔体包裹体是迄今为止记录中含水量最高的包裹体之一（8wt% H2O）。 CO2 含量普遍较低（
Volatiles contribute to magma ascent through the sub-volcanic plumbing system. Here, we investigate melt inclusion compositions in terms of major and trace elements, as well as volatiles (H2O, CO2, SO2, F, Cl, Br, S) for Quaternary Plinian and dome-forming dacite and andesite eruptions in the central and the northern part of Dominica (Lesser Antilles arc). Melt inclusions, hosted in orthopyroxene, clinopyroxene and plagioclase are consistently rhyolitic. Post-entrapment crystallisation effects are limited, and negligible in orthopyroxene-hosted inclusions. Melt inclusions are among the most water-rich yet recorded (8wt% H2O). CO2 contents are generally low (