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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Thermal and geochemical constraints on the 'deep' magmatic structure of Mt. Vesuvius
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Thermal and geochemical constraints on the 'deep' magmatic structure of Mt. Vesuvius

机译：热和地球化学限制了山的“深”岩浆结构。维苏威

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摘要

A review of available and new isotopic data on rocks from Mt. Vesuvius together with geophysical and mineralogical data allow us to define a 'deep' complex magmatic reservoir where mantle-derived magmas arrive, stagnate and differentiate, and to constrain a thermal model, which describes the history and present state of the reservoir and its surrounding rocks. The top of the reservoir is located at about 8 km depth, and it extends discontinuously down to 20 km depth. The reservoir is hosted in densely fractured continental crustal rocks, where magmas and crust can interact, and, according to thermal modeling results, has been fed more than once in the last 400 ka. The hypothesis of crustal contamination is favored by the high temperatures reached by crustal rocks as a consequence of repetitive intrusions of magma. From the 'deep' reservoir magmas rise to form 'shallow' magma chambers at different depths, as already known in the literature, where they can undergo low-pressure differentiation and mixing and feed the volcanic activity.
机译：对来自山的岩石的可用和新同位素数据的综述。维苏威火山与地球物理和矿物学数据一起使我们能够定义一个“深”复杂岩浆储层，地幔衍生岩浆在那里到达，停滞和分化，并约束一个热模型，该热模型描述了储层及其周围岩石的历史和当前状态。水库的顶部位于约8 km的深度，不连续地向下延伸至20 km的深度。该储层位于密集裂隙的大陆地壳岩石中，岩浆和地壳可以在其中相互作用，并且根据热模拟结果，在最近的400 ka中已多次注入该储层。由于岩浆的反复侵入，地壳岩石达到的高温支持了地壳污染的假说。从“深层”储层岩浆上升到不同深度形成“浅层”岩浆室，正如文献中已经知道的那样，在那里它们可以进行低压分化和混合并为火山活动提供动力。

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