摘要
主要针对斜长石环带的成因动力学机制模型进行可视模拟的探讨。前人研究认为:斜长石韵律环带的形成仅仅与岩浆后期侵入的周期线性相关,因此,本模拟计算引入非线性元胞自动机分析方法并借助Matlab平台编写计算机软件来模拟斜长石环带生长机制。根据Fick扩散定律等,通过元胞自动分析机,模拟在不同开放程度的岩浆系统背景下的形成过程,结果表明韵律环带不仅仅与有岩浆后期侵入的环境相关,还与晶体附近的岩浆的An浓度的重新趋近饱和有关。
The purpose of this paper is to discuss the kinetic mechanism of zoning in plagioclase through simulation based on some models.In the period of 1980 s to 1990 s,some Chinese scholars started studying on zoning growth in plagioclase in the perspective of nonlinear science and self-organization,which was initiated by some foreign scholars.Recent years,some scholars consider that the formation of oscillatory zoning occurs only when plagioclase grows up under the condition of later magma intrusions.In this paper,a new research approach of Cellular-Automata analysis tool in the platform of Matlab as the analytic method of nonlinear and self-organization is introduced.Based on Fick′s diffusion law and Cellular-Automata analysis,this study simulates several different magmatic settings to understand zoning growth courses.It is indicated that the formation of oscillatory zoning not only relates to the magmatic setting of later magma intrusion,but also to the resaturation of concentration of CaAl2Si2O8 in the magmatic liquid around the crystalline plagioclase.
出处
《矿物岩石》
CAS
CSCD
北大核心
2011年第4期13-18,共6页
Mineralogy and Petrology
基金
国家863项目基金(编号2009AA06Z110)
