Chemical evolution of the upper mantle : Constraints from pressure temperature history of the major European peridotite bodies.

为了了解上地幔的化学演化，我们研究了发生在欧洲的造山地幔体的上升历史：比利牛斯的橄榄岩块、Ronda超镁铁杂岩和Lanzo超镁铁杂岩。我们对3个超镁质体进行了实地调查，采集了大量样品，对样品进行了薄片观察、EPMA分析和SEM/EBSD分析。我们估计了这些超镁质体的减压历史，包括初始条件。结果与我们在北海道霍罗曼超镁铁复合体上的数据进行了比较。岩石圈地幔的上升历史有很大的变化，每一个变化都对应于岩石圈和软流圈地幔的热力学相互作用动力学。

In order to understand the chemical evolution of the upper mantle, we have examined ascent history of orogenic mantle bodies occurring in Europe : peridotite masses in Pyrenees, Ronda ultramafic complex, and Lanzo ultramafic complex. We conducted field survey in the three ultramafic bodies and collected many samples, on which thin section observation, EPMA analysis, and SEM/EBSD analysis were made. We estimated decompressional histories of these ultramafic bodies including the initial condition. The results were compared with our data on the Horoman ultramafic complex, Hokkaido. There is a wide variation in ascent history of lithospheric mantle, each of which corresponds to dynamics of thermal and mechanical interaction of lithospheric and asthenospheric mantle.