类质同象的研究方法及意义

Method and significance for study of isomorphism

结合研究史作者论述了元素类质同象、间隙原子和固溶体概念的异同。指出类质同象元素的3个属性:同生性、共生性和同晶体化学位。提出元素统计式均匀分布为鉴别类质同象状态的理论准则,例举电子探针、矿物物性鉴别“杂质”属性的可行性,指出电子探针方法为最佳选择。论述了类质同象的重要地学意义:岩浆演化的指示剂和地质温压计。提出类质同象副成分作为找矿地球化学标志的新思路。元素不同存在状态的查定在矿产资源评价中具有重要意义。

Considering the research history,the authors discuss the similarities and differences of the concepts of isomorphism,interval atom and solid solution of elements and point out three properties of syngenetic property,paragenetic property and common state of crystal chemistry. The even element distribution in statistics is the theoretical standard to distinguish isomorphism state. It is useful to examine the properties of'foreign substance'in a mineral,electron microprobe and the analysis of physical properties of minerals. The method of elcctron microprobe is the best choice. Isomorphism can be a geological thermometer,an indicator of magma evolution and indicator of geochemistry for mineral exploration. It is significant to examine the different existing states of elements for evaluating mineral resources.