Maturing processes of deeper part of the Island arc: Diversity of crust-mantle boundary and their origins in the Albania Ophiolite

为了了解岛弧系统深部的成熟过程，我们研究了来自世界各地的与弧有关的蛇绿岩和相关岩石，特别是在阿尔巴尼亚的米尔迪塔蛇绿岩中。在野外工作的基础上，结合地球化学分析，我们总结出岛弧系统深部的成熟过程如下：(1)含水流体/熔体渗入的流入熔融作用向橄榄岩段上部增加，即最上部的地幔段；(2)富硅是与板片来源的水化流体相互作用的结果；(3)西米尔迪塔蛇绿岩中的橄榄岩地块最初形成于大洋中脊环境，但也受到与弧有关的水化流体/熔体的影响。形成富含角闪石的橄榄岩。

In order to understand the maturing processes in the deeper part of the Island arc systems, we examined arc-related ophiolites and related rocks from all over the world, particularly in the Mirdita ophiolite, Albania. Based on our filed works coupled with geochemical analyses, we concluded the maturing processes in the deeper part of the Island arc system as follows:(1) Effect of influx melting due to infiltration of hydrous fluids/melts are increased toward the upper section of the peridotite section, i.e., the upper most mantle section(2) Silica-enrichment is caused by interaction with slab-derived hydrous fluids(3) Peridotite massifs in the Western Mirdita Ophiolite, which had been interpreted to be of mid-ocean ridge origin, were originally formed at mid-ocean ridge setting, but was also affected by arc-related hydrous fluids/melts, resulting in the formation of fertile peridotite, such as amphibole-rich peridotites.