中国不同产地绿松石光谱学及地球化学特征

Spectroscopic and Geochemical Characteristics of Turquoise from Different Mining Sites in China

不同产地绿松石的指纹特征识别是产源研究的关键点.本文总结了国内绿松石已有的研究成果,在此基础上对比分析了不同产地绿松石地质环境、光谱学和地球化学等特征.结果显示,国内绿松石主要产于碳硅质板岩、硅质板岩、硅质岩等浅变质岩-沉积岩中,但马鞍山绿松石出露于火成岩之中.不同产地绿松石具有相似的红外光谱和拉曼光谱特征,仅存在细微差别,而在地球化学特征上具有较为显著的差异,特别是沉积环境敏感元素Sr、Ba、V、Mo、Cr、Ce等.绿松石的产地指纹特征研究应重点考虑沉积环境相关元素及判别指标.

It is the key point of research to identify the characteristics of turquoise's fingerprints from different mining sites.This paper summarized the researches on turquoise in China and analyzed the geological environment,spectroscopic and geochemical characteristics of turquoise from different mining sites.The Result showed that turquoises in China were mainly produced in carbon siliceous slate,siliceous slate,siliceous rock,and other shallow metamorphic rocks-sedimentary rocks,but Maanshan turquoise was located in volcanic rocks.Turquoises from different mining sites had similar Infrared spectroscopic and Raman spectroscopic characteristics,with only minor differences.However,turquoises show significant differences in geochemical characteristics,especially in the sensitive elements of sedimentary environment Sr,Ba,V,Mo,Cr,Ce.The study on the fingerprint characterics of turquoise in China should focus on sedimentary environment-related elements and discriminating indicators.