Bergantz G W
Science. 1989 Sep 8;245(4922):1093-5. doi: 10.1126/science.245.4922.1093.
The quantitative assessment of underplating and concomitant partial melting of continental crust requires the use of geologically reasonable melt fraction distributions as a function of temperature. Conductive modeling indicates that simple underplating of metapelite by basalt can yield magma bodies with melt fractions above the rheological limit of extraction for almost any reasonable geotherm. Convection and subsequent homogenization are likely in these bodies. Granitic and tonalitic protoliths do not appear to yield substantial amounts of extractable magma. These results indicate that underplating involves repeated intrusion or occurs in deep crust.
对大陆地壳底侵作用及伴随的部分熔融进行定量评估，需要使用符合地质常理的熔体分数分布作为温度的函数。热传导模拟表明，玄武岩对变质泥质岩的简单底侵作用，几乎在任何合理的地温梯度下，都能产生熔体分数高于流变学萃取极限的岩浆体。这些岩浆体可能会发生对流及随后的均匀化。花岗岩质和英云闪长质原岩似乎不会产生大量可萃取岩浆。这些结果表明，底侵作用涉及反复侵入或发生在深部地壳。
