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Mobility and amount of metamorphic fluid during exhumation of deeply subducted continental crust

机译：深层俯冲大陆壳掘出过程中变质流体的流动性和数量

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摘要

A great deal of studies have been devoted in past two decades to the composition and flow of fluid in HP and UHP metamorphic rocks that formed during subduction of oceanic crust. It has been recognized that a great deal of fluid was released during subduction of oceanic crust, resulting in arc magmatism, quartz veining and metamorphic mineralization of syn-subduction. However, knowledge concerning the origin of retrograde fluid is still incomplete, and sometimes misleading because it was simply ascribed to external origin by ignoring exsolution of internal fluids. With the advance in the study of stable isotopes, fluid inclusions and petrological phase relationships in HP to UHP metamorphic rocks that formed during the deep subduction of continental crust, it becomes clear that the compositional differences in continental and oceanic crusts result in differences in the mobility and amount of fluid within metamorphic products in the processes of subduction and exhumation.
机译：在过去的二十年中，已经进行了大量的研究，研究了洋壳俯冲过程中形成的高压和超高压变质岩中流体的组成和流动。已经认识到，在大洋地壳俯冲过程中释放出大量流体，导致弧岩浆作用，石英脉和同向俯冲的变质矿化。但是，关于逆行流体起源的知识仍然不完整，有时会引起误解，因为它只是由于忽略了内部流体的排出而被简单地归因于外部起源。随着对大陆壳深俯冲过程中形成的HP与UHP变质岩中稳定同位素，流体包裹体和岩石相关系的研究的进展，很明显，大陆壳和海洋壳的成分差异会导致流动性差异。俯冲和掘尸过程中变质产物中的流体量。

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