Volatiles in subduction zone magmatism
Volatiles in subduction zone magmatism
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DOI：
10.1144/sp410.13
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发表时间：
2014-11
期刊：
影响因子：
--
通讯作者：
G. Zellmer;M. Edmonds;S. Straub
中科院分区：
文献类型：
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作者：
G. Zellmer;M. Edmonds;S. Straub
俯冲带的挥发旋回是弧岩浆成岩、搬运、储存和喷发的关键。挥发分控制着板片组分进入地幔楔的通量，通过降低地幔物质的固含量而负责熔体的生成，并影响上覆地壳的结晶相组合。在全球范围内，岩浆积水深度可能部分地由熔体挥发分含量控制。挥发分还影响岩浆储存和减压过程中的脱气速率和程度，影响岩浆流变学，从而控制喷发方式。火山喷发的类型又决定了对环境敏感的气体注入大气层的高度和爆发性弧火山作用的影响。在这篇综述中，我们总结了最近的进展，挥发物的作用在板脱水，熔融生成的地幔楔，岩浆在覆盖地壳的演化，火山喷发触发，并释放一些岩浆挥发物从火山大厦进入地球的大气。
Abstract The volatile cycle at subduction zones is key to the petrogenesis, transport, storage and eruption of arc magmas. Volatiles control the flux of slab components into the mantle wedge, are responsible for melt generation through lowering the solidi of mantle materials, and influence the crystallizing phase assemblages in the overriding crust. Globally, magma ponding depths may be partially controlled by melt volatile contents. Volatiles also affect the rate and extent of degassing during magma storage and decompression, influence magma rheology and therefore control eruption style. The style of eruptions in turn determines the injection height of environmentally sensitive gases into the atmosphere and the impact of explosive arc volcanism. In this overview we summarize recent advances regarding the role of volatiles during slab dehydration, melt generation in the mantle wedge, magmatic evolution in the overriding crust, eruption triggering, and the release of some magmatic volatiles from volcanic edifices into the Earth's atmosphere.