微区分析在地质研究中的应用——以金银互化物的研究为例

The Application of Microbeam Analysis to Geological Study ——Exemplified by the Study of Au-Ag Intergrowth Compounds

微区分析是现代分析技术在地质研究应用中的一个重要领域，通过电子探针对矿物的微区分析，提供了矿床成因理论研究的新依据。本文以金银互化物的研究为例，讨论了在不同成因类型矿床中，金－银构成一个连续的类质同象系列，且变化是有规律可循，其微量元素的含量与该矿床成矿地质环境和相应的地球化学场有关，从而为找矿提供了新的地质信息。

Microbeam analysis is a new technology applied in geology Through microbeam analysis of minerals by means of electron microprobe, the author obtained new evidence on the origin of ores, which deepens the genetic theory on mineral deposits.Taking Au-Ag intergrowth compounds as an example, this paper has reached the following conclusions. In the Au-Ag compounds of different types of gold deposits, as sequentially replaces Au, making up a continuous isomorphous series. The content of Au and Ag in native gold forms a regular pattern. The development of native gold and that of electrum have something to do with different types of gold deposits respectively. Abundances of trace elements in Au-Ag minerals are controlled by geological settings and geochemical fields.The above study provides new geological information and a new method for the study and exploration of gold deposits.