Numerical model of convection in sills |
| |
| Authors: | A Rozmarynowska L Czechowski |
| |
| Institution: | (1) Institute of Geophysics, Warsaw University, ul. Pasteura 7, 02-093 Warsaw, Poland;(2) Present address: Institute of Geophysics, Polish Academy of Science, ul. Ks. Janusza 64, 01-452 Warsaw, Poland |
| |
| Abstract: | The numerical model of convection in magma sills is developed. The model is based on a full system of equations of fluid dynamics and includes heat transfer, buoyancy effects and diffusion of some minor component (marker). Solidification is treated as a phase transition. The results indicate that there are some qualitative differences between very thin sills with Rayleigh number Ra = 105 and thin sills with Ra = 106. For a basaltic magma the first case corresponds to the thickness of the sills of approximately 30 cm and the second case corresponds to the thickness of 60 cm. In the first case mixing is inefficient and conduction is the dominant form of heat transfer. In the second case mixing is efficient and convection is the dominant form of heat transfer. Some of the results can be scaled for the more viscous magmas in thicker sills. |
| |
| Keywords: | convection sill magma intrusion numerical model |
| 本文献已被 SpringerLink 等数据库收录！ |
|
