中文摘要：

利用YJ-3000t和JL-3600t多顶砧压力机，以哀牢山造山带南部红河县大白能—乐育剖面上的天然块状斜长角闪岩为初始样品，在950℃、1.0～3.5GPa、恒温20～300h条件下进行了两个系列的斜长角闪岩块状样品脱水部分熔融实验：（1）保持温度T=950℃，加热时间t=100h不变，改变压力（1.0～3.5GPa）的实验；（2）保持温度T=950℃，压力p=3.0GPa不变，改变加热时间（20～300h）的实验。结果表明，1.0～3.5GPa、950℃、恒温100h的条件下，随压力升高，斜长角闪岩中依次生成了单斜辉石＋石榴石＋熔体的矿物组合（1.0～1.5GPa）和单斜辉石＋石榴石＋熔体＋硬玉＋SiO2矿物＋蓝晶石（2.0～3.5GPa）的矿物组合。3.0GPa、950℃条件下，随加热时间增加，实验产物中依次生成了单斜辉石＋石榴石＋熔体＋硬玉＋SiO2矿物＋蓝晶石的矿物组合（20～100h）和单斜辉石＋石榴石＋熔体的矿物组合（150～300h）。斜长角闪岩的原岩结构决定了实验产物中新生矿物和熔体的分布。依据实验产物的矿物组合和新生矿物的分布特征，讨论了950℃、1.0～3.5GPa、恒温（20～300h）条件下，斜长角闪岩部分熔融过程的结构变化、变质反应以及石榴石冠状体的成因。

英文摘要：

Two sets of dehydration-melting with a natural solid amphibolite（56vol.% hornblende, 43vol.% plagioclase）, collected from the Dabaineng-Leyu profile in the southern Ailaoshan orogenic belt, Honghe County, Yunnan Province, have been carried out in multi-anvil apparatus（YJ-3000t and JL-3600t） at 1.0-3.5 GPa and 950 ℃ for 20-300 h. One is keeping the temperature at 950 ℃ and the annealing time of 100 h, varying the pressure （1.0-3.5 GPa）. The other is keeping the pressure at 3.0 GPa and temperature at 950 ℃, varying the annealing time （20-300 h）. The products are inspected with microscope and electron probe. The results indicate that at 950 ℃, annealing time of 100 h, as the pressure in the range of 1.0-1.5 GPa, the min eral assemblage in the products is clinopyroxene＋ garnet ＋ melt. As the pressure larger than 1.5 GPa, the mineral assemblage in the products is clinopyroxene ＋ garnet ＋ melt ＋ Jadeite ＋ SiO2 ± kyanite. However, at 3.0 GPa and 950 ℃, as the annealing time in the range of 20-100 h, the mineral assemblage of clinopyroxene ＋garnet＋melt＋Jadeite＋SiO2 ±kyanite appears successively with time in the products. As the annealing time longer than 100 h, the mineral assemblage of clinopyroxene＋garnet＋melt appears in the products. The distribution of the newly-formed minerals and melt is restricted by the texture of the started amphibolite. Based on the mineral distribution and assemblage in the run products at 1.0-3.5 GPa and 950 ℃ for 20-300 h, the textural development of amphibolite during the partial melting process, the metamorphic reaction, and the garnet corona generation are discussed.