摘要
作者根据斜长石结晶生长过程的非平衡与非线性特征,熔体聚合模型和正规溶法模型,提出了斜长石振荡环带成因的动力学模型:f=1/(1+β(1-x^3/x^3)(e^(-w/rt)^(1-2f))该模型的数值模拟表明:当W/RT＜－2时,上述方程有三重态;由此模型并结会斜长石表面成分的质量平衡方程就能较合理地解释振荡环带的成因.而且,此模型可以推广到二组分硅酸盐固溶体矿物中振荡环带的情形．
Based on the non-equilibrium and nonlinear features in the process of plagioclase crystal growth and the melt polymerization and solution models, we have proposed an interface layer reation-diffusion dynamic model for the oscillatory zoning of plagioclase, i.e.:
The result of digital simulations has demonstrated that there are three solutions (state)sfor the above equation if W/RT<-2. This model, combined with mass-balance equations of plagioclase surface components, provides a possible answer to the genesis of the oscillatory zoning. Furthermore, this model can also be used to explain the genesis of the oscillatory zoning of silicate-solid-solution minerals.
出处
《地质科技情报》
CAS
CSCD
北大核心
1990年第2期51-57,共7页
Geological Science and Technology Information
