Melt movement through the Icelandic crust
Melt movement through the Icelandic crust
复制标题
穿过冰岛地壳的融化运动
DOI：
--
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
T. Ágústsdóttir
中科院分区：
文献类型：
--
作者：
R. White;M. Edmonds;J. Maclennan;T. Greenfield;T. Ágústsdóttir
我们同时使用地震学和地质压力学来研究冰岛火山地壳的融化运动。我们已经捕捉到了熔体在从上地幔到浅地壳的一系列岩床内或穿过岩床移动的过程中，当它向上移动时，会产生一系列小地震。熔融物不仅注入到中央火山的下方，而且还注入到沿着裂谷带和下面地幔柱中心上方的离散位置。我们认为，所需的高应变率产生地震活动在深度为10-25公里，在一个正常的韧性部分的冰岛地壳与二氧化碳的玄武岩熔体的出溶。地震活动性和地质压力测量提供了关于熔体在地壳中移动的方式的补充信息，停止和分离，并且通常在向上的途中冻结在一个或多个熔体透镜体中：地震活动性显示了今天瞬时发生的事情，而地质压力测量给出了在喷发之前熔体在地壳中停留深度的较长时间尺度上的平均限制。本文是Theo Murphy会议议题“岩浆储层结构和动力学”的一部分。
We use both seismology and geobarometry to investigate the movement of melt through the volcanic crust of Iceland. We have captured melt in the act of moving within or through a series of sills ranging from the upper mantle to the shallow crust by the clusters of small earthquakes it produces as it forces its way upward. The melt is injected not just beneath the central volcanoes, but also at discrete locations along the rift zones and above the centre of the underlying mantle plume. We suggest that the high strain rates required to produce seismicity at depths of 10–25 km in a normally ductile part of the Icelandic crust are linked to the exsolution of carbon dioxide from the basaltic melts. The seismicity and geobarometry provide complementary information on the way that the melt moves through the crust, stalling and fractionating, and often freezing in one or more melt lenses on its way upwards: the seismicity shows what is happening instantaneously today, while the geobarometry gives constraints averaged over longer time scales on the depths of residence in the crust of melts prior to their eruption. This article is part of the Theo Murphy meeting issue ‘Magma reservoir architecture and dynamics'.
大地测量数据揭示了冰岛阿斯贾火山口持续沉降的情况
影响因子：
3.5
作者：
De Zeeuw-Van Dalfsen E
通讯作者：
De Zeeuw-Van Dalfsen E
影响因子：
5.3
作者：
Laumonier, Mickael;Farla, Robert;Baumgartner, Lukas P.
通讯作者：
Baumgartner, Lukas P.
影响因子：
5.3
作者：
Hartley, Margaret E.;Maclennan, John;Thordarson, Thor
通讯作者：
Thordarson, Thor