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首页> 外文期刊>Chinese science bulletin >Experimental study on dehy - dration melting of natural biotite - plagioclase gneiss from High Himalayas and implica - Tions for Himalayan crust Aatexis
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Experimental study on dehy - dration melting of natural biotite - plagioclase gneiss from High Himalayas and implica - Tions for Himalayan crust Aatexis

机译：喜马拉雅地壳Aatexis天然黑云母-斜长岩片麻岩脱水融化实验研究。

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摘要

Here we present the results of dehydration melting, melt morphology and fluid migration based on the dehydration melting experiments on natural bio - tite - plagioclase gneiss performed at the pressure of 1.0-1.4 Gpa, and at the temperature of 770-1028 deg. C. Experimental Results demonstrate that: (I) most of melt tends to be dis - Tributed along mineral boundaries forming "melt film" even The amoung of melt is less than 5 vol/100; melt connectivity is Controlled not only by melt topology but also by melt fraction; (ii) dehydration melting involves a series of subprocesses including subsolidus dehydration reaction, fluid migration, vapor-present melting and vapor - absent melting; (iii) ex - periments produce peraluminous granitic melt whose com - position is similar to that of High Himalayan leucogranites (HHLG) and the residual phase assemblage is Pl + Qz + Gat + Bio - Opx ±Cpx ± + Ilm /Rlm/Rut ±Kfs and can be comparable With granulites observed in Himalayas.
机译：在此，我们基于在1.0-1.4 Gpa的压力和770-1028度的温度下对天然生物-斜长岩斜长片麻岩进行的脱水熔融实验，给出了脱水熔融，熔融形态和流体迁移的结果。 C.实验结果表明：（I）大多数熔体趋向于分散-沿矿物边界流淌形成“熔体膜”，即使熔体中的含量小于5 vol / 100；熔体连通性不仅受熔体拓扑结构控制，还受熔体分数控制。 （ii）脱水熔融涉及一系列子过程，包括亚固相脱水反应，流体迁移，蒸气存在的熔融和蒸气-不存在的熔融； （iii）实验产生的高铝质花岗岩熔体的成分与喜马拉雅高白垩石（HHLG）的成分相似，剩余相组合为Pl + Qz + Gat + Bio-Opx±Cpx±+ Ilm / Rlm / Rut± Kfs和Kfs可以与在喜马拉雅山中观察到的粒状岩相媲美。

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