中文摘要：

二个变形过程，即潜水艇先令脱水并且发生在 MORB，元沉积和潜水艇 ducted 的橄榄岩的部分融化海洋的岩石圈根据当模特儿的可得到的试验性的工作和阶段平衡被讨论。在很冷的 subduction 磅(压力温度)政体，在基本的层的水的大部分在蓝片岩外形的发作下面释放了的含水的 MORB 表演的相图(【 20 km )，并且在到通过 glaucophane 脱水的 lawsonite eclogite 外形的从 lawsonite 蓝色片岩的转变的深度( 60 70 km )；仅仅水的更小的部分将在对弧岩浆形成合适的深度范围通过 lawsonite 和硬绿泥石的脱水逃离平板；并且在 lawsonite 和 phengite 存储的水的很小的部分将褪色进更深的披风。为弧岩浆形成的闪石的角色仍然是可争辩的。在在在深度的 Al 富有的 metapelites 的冷 subduction 磅政体，在 Al 差的元沉积的绿泥石和滑石的脱水，和硬绿泥石和 carpholite，约 80 100 km 将做一些贡献到弧岩浆的形成。比较地，脱水在含水的橄榄岩蛇发生在 120 180 km 的深度，在弧 magmatism 起一个重要作用。沿着温暖的磅政体的海洋的外壳的 Subduction 将在 80 km 上在深度穿过稳固的 i，导致在在包含黑云母和 phengite 的元沉积，并且在包含绿帘石和闪石的碱性岩的浸透液体、液体不在的条件下面的部分融化。基本外壳的 melt 作文是在压力 【 的 adakitic 3.0 GPa，但是变得每铝土在更高的压力花岗石。

英文摘要：

Two metamorphic processes, i.e. subsolidus dehydration and partial melting occurring in MORB, metasediments and peridotite of subducted oceanic lithosphere are discussed on the basis of available experimental work and phase equilibrium modeling. Phase diagrams of hydrous MORB show that in most cold subduction P-T （pressure-temperature） regimes a large portion of water in the basic layer has released below the onset of blueschist facies （〈 20 km）, and at a depth （60--70 km） of transition from lawsonite blueschist to lawsonite eclogite facies through glaucophane dehydration; only a smaller portion of water will escape from the slab through dehydration of lawsonite and chloritoid in the depth range suitable for arc magma formation; and a very small portion of water stored in lawsonite and phengite will fade into the deeper mantle. The role of amphibole for arc magma formation is still arguable. In cold subduction P-Tregimes, the dehydration of chlorite and talc in AI-poor metasediments, and chloritoid and carpholite in AI-rich metapelites at a depth around 80--100 km will make some con- tributions to the formation of arc magma. Comparatively, dehydration of serpentine in hydrated peri- dotite occurs at depths of 120--180 km, playing an important role in the arc magmatism. Subduction of oceanic crust along warm P-T regimes will cross the solidi at a depth over 80 km, resulting in partial melting under fluid-saturated and fluid-absent conditions in the metasediments involving biotite and phengite, and in the basic rocks involving epidote and amphibole. The melt compositions of the basic crust are adakitic at pressures 〈 3.0 GPa, but become peraluminous granitic at higher pressures.