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首页> 外文期刊>Contributions to Mineralogy and Petrology >Melt variability in percolated peridotite: an experimental study applied to reactive migration of tholeiitic basalt in the upper mantle
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Melt variability in percolated peridotite: an experimental study applied to reactive migration of tholeiitic basalt in the upper mantle

机译：渗碳橄榄岩的熔体变异性：一项实验研究，用于上地幔中玄武岩的反应性迁移

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摘要

Melt-rock reaction in the upper mantle is recorded in a variety of ultramafic rocks and is an important process in modifying melt composition on its way from the source region towards the surface. This experimental study evaluates the, compositional variability of tholeiitic basalts upon reaction with depleted peridotite at uppermost-mantle conditions. Infiltration-reaction processes are simulated by employing a three-layered set-up: primitive basaltic powder ('melt layer') is overlain by a 'peridotite layer' and a layer of vitreous carbon spheres ('melt trap'). Melt from the melt layer is forced to move through the peridotite layer into the melt trap. Experiments were conducted at 0.65 and 0.8 GPa in the temperature range 1,170-1,290°C. In this P-T range, representing
机译：上地幔中的熔岩反应记录在各种超镁铁质岩石中，是从源区到地表的过程中改变熔体成分的重要过程。这项实验研究评估了地幔玄武岩在最上地幔条件下与贫化橄榄岩反应后的组成变异性。通过采用三层结构模拟渗透反应过程：原始玄武岩粉末（“熔体层”）被“橄榄岩层”和一层玻璃碳球（“熔体陷阱”）覆盖。来自熔体层的熔体被迫穿过橄榄岩层移动到熔体阱中。在1,170-1,290°C的温度范围内以0.65和0.8 GPa进行实验。在这个P-T范围内，代表

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