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弧相关蛇绿岩和相关岩石，特别是阿尔巴尼亚的Mirdita蛇绿岩。根据野外工作和地球化学分析，我们认为岛弧体系深部的成熟过程如下：(1)在橄榄岩段上部，即最上地幔段，由于水流体/熔体的渗透，流入熔融作用增强；(2)与板源水流体的相互作用导致硅质的富集；(3)西Mirdita奥绿岩的橄榄岩块体。被解释为洋中脊成因，最初形成于洋中脊背景，但也受到与弧相关的含水流体/熔体的影响，形成了丰富的橄榄岩，如富含角闪岩的橄榄岩。

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.