随着高空间分辨率的质谱仪的逐渐普及,研究矿物中同位素分布及其反映的受热历史,已经成为未来一个重要的方向。扩散速度的不同是造成同位素在矿物中同位素分布不均匀的根本原因。扩散是由于热运动引起的物质中粒子传递迁移的过程。在晶体中,扩散是指粒子或者缺陷从一个平衡位置到另一个平衡位置的一系列的跃迁。对于不同的同位素,由于质量的差异,轻的比重的扩散的快,从而产生同位素的动力学分馏。Parkinson等(2007)研究发现,在上地幔、接触性变质带和岩浆体系中 With the increasing popularity of high-resolution mass spectrometers, studying the distribution of isotopes in minerals and their history of heat history has become an important direction in the future. Differences in the rate of diffusion are the root causes of the non-uniform distribution of isotopes in minerals. Diffusion is due to the movement of particles in the material caused by the heat transfer process. In crystals, diffusion refers to a series of transitions of particles or defects from one equilibrium position to another equilibrium position. For different isotopes, due to differences in mass, the light weight diffuses rapidly, resulting in a kinetic fractionation of the isotope. Parkinson et al. (2007) found that in the upper mantle, contact metamorphic belt and magmatic system