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实验岩石学的研究表明，岩石中熔体的出现．可诱发断层作用，加强碎裂流动、位错蠕变和扩散蠕变作用。在给定的条件下，上述四种变形机制在部分熔融岩石中都会起作用，但只有那种能产生最快应变速率的机制占主导地位。而应变速率与岩石中熔体的百分数（体积）有关，因此，当熔体的百分数不同时，占主导地位的变形机制会有所不同。临界熔体百分数曾被当作反映部分熔融岩石流变学特征的一个重要参数，但近期的研究表明，临界熔体百分数受诸多因素的影响，或者说部分熔融岩石根本就不存在这样的植。熔体的出现极大地改变了岩石的流变学特征。
Experimental petrology studies have shown the presence of melt in rocks. Can induce faulting, strengthening the fragmentation flow, dislocation creep and diffusion creep effect. Under the given conditions, the above four deformation mechanisms all play a role in the partial melting of the rock, but only the mechanism that produces the fastest strain rate dominates. The rate of strain is related to the percentage of the melt in the rock, so the dominant deformation mechanism will differ when the percentage of melt is different. The critical melt percentage was used as an important parameter to reflect the rheological characteristics of partially melted rocks. However, recent studies have shown that the percentage of critical melt is affected by many factors, or that some of the molten rocks do not exist at all. The presence of the melt greatly changed the rheological characteristics of the rock.