新疆奇台硅化木的结构及成分分析

Structures and Composition Analysis on Petrified Wood in Qitai Area of Xinjiang Uygur Autonomous Region

摘要:

新疆奇台是我国硅化木的重要产地，学者研究和资料表明奇台硅化木是亿万年前树木被SiO2交代的产物。SiO2结合的方式是多种多样的，能形成不同的矿物。根据奇台硅化木的不同颜色，利用偏光显微镜和红外光谱仪对同一块硅化木的3种代表颜色进行测试分析。经研究分析认为：奇台硅化木的结构是木质纤维结构，颜色不同SiO2交代的程度不同。奇台硅化木样品颜色不同物质成分也不同，绿色部分主要的物质成分是玛瑙，黑色部分主要的物质成分是蛋白石，灰色部分主要的物质成分是玉髓。

Abstract:

Qitai area in Xinjiang Uygur Autonomous Region is an important origin of petrified wood. Petrified wood formed by trees buried underground for hundreds of millions of years and was metamorphed by SiO2. Combination modes of SiO2 have many types, which can be formed different minerals. According to different colors of Qitai petrified wood, by using polarized light microscopy and infrared spectroscopy, three representative colors of the same piece of petrified wood have been tested and analyzed. Through study and analysis, it is regarded that structures of Qitai petrified wood are wood fiber structures. Different colors have different metasomatism degree of SiOand different compositions. The material composition of the green part is agate, the material composition of the black part is protein and the material composition of the gray part is chalcedony.