AM05-10-011 パラメータ化された1次元モデルによるマグマ溜まり内の熱対流と上面地殻の熔融の数値計算(対流3,一般講演)

概要

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The effects of intrusion of a magma chamber and the thermal erosion of its surroundings on the extent of partial melting of the crust are investigated by using a one-dimensional parameterized convection model. The convective heat flux through the boundaries of the chamber is estimated by the four-third power law of the temperature difference at the boundaries. The degree of partial melting is estimated by the enthalpy method. Numerical time integration is performed for 60000 years after the initial intrusion of the magma chamber into the Moho discontinuity whose total thickness and temperature is 1km and 1300℃, respectively. When the roof of the magma chamber moves upward by the thermal erosion, the produced total melt thickness in the crust is only one-fourth of that when the thermal erosion is inhibited. This result suggests that the conclusion of previous studies considering only conductive heat transport should be reexamined.
日本流体力学会の論文
2005-09-05