Volcanism on Mercury: A new model for the history of magma ascent and eruption
Volcanism on Mercury: A new model for the history of magma ascent and eruption
复制标题
水星上的火山作用：岩浆上升和喷发历史的新模型
DOI：
10.1029/2008gl035620
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发表时间：
2008
影响因子：
5.2
通讯作者：
J. Head
中科院分区：
文献类型：
--
作者：
L. Wilson;J. Head
我们利用水星上火山活动的识别，结合叶状、流锋状地形、地壳成分信息以及岩石圈应力状态和历史数据，推导出水星上岩浆上升和喷发的新模型。我们发现挤压很可能以高渗出率事件为主。岩墙在地壳中的最初就位和向地表的挤压将导致地壳更致密，有利于更强烈的火山活动。随后将出现与行星热演化相关的冷却，这将迅速降低岩浆到达地表的能力，导致区域平滑平原就位和变形后火山活动的减弱和终止。这些预测和由此产生的历史可以通过水星任务的观测来检验。
We use the identification of volcanism on Mercury, together with lobate, flow‐front like topography, crustal composition information and data on the stress state and history of the lithosphere, to derive a new model for the ascent and eruption of magma on Mercury. We find that extrusion is likely to be dominated by high‐effusion rate events. Initial emplacement of dikes in the crust and extrusions to the surface will result in a denser crust, favoring even more extrusive volcanism. This will be followed by cooling associated with planetary thermal evolution that will rapidly decrease the ability of magma to reach the surface, resulting in a decline and termination of volcanism following the emplacement and deformation of regional smooth plains. These predictions and the resulting history can be tested with observations from missions to Mercury.