河北承德“热河玉”的宝石学特征

Gemmological Characteristic of Serpentine Jade ("Rehe Jade") from Chengde, Hebei Province

  • 摘要: 河北省承德市宽城满族自治县东部边缘与辽宁省凌源市交界处,矿山企业在开采金属矿的时候,发现了一种蛇纹石质玉,当地玉石市场称之为“热河玉”。该矿区所发现的蛇纹石质玉石颜色丰富、质地细腻,属于优质的玉石原材料。通过偏光显微镜观察、X射线粉末衍射分析以及红外光谱分析,得到了“热河玉”较为系统的研究数据。研究结果显示,“热河玉”的主要矿物组成为斜纤蛇纹石,具显微纤维交织结构,另含有一定量的透辉石和方解石。“热河玉”与国内常见的其他产地的蛇纹石质玉的外观特征差异主要表现在具有红色和黄色品种,其主要致色元素为Fe元素。“热河玉”由富含SiO2的岩浆岩与白云质灰岩接触交代而成,是一种优质的玉石资源,具有较高的经济开发利用价值。

     

    Abstract: "Rehe jade", a new variety of serpentine jade, was discovered at the junction place between the Kuancheng Manzu Autonomous County, Chengde City, Hebei Province and Lingyuan City, Liaoning Province. In the paper, a systematic investigation with the help of polarizing microscope observation, X-ray powder diffraction analysis and infrared spectroscopic techniques for the "Rehe jade" was performed. The results showed that the "Rehe jade" mainly consists of clinochrysotile with micro-fiberous and interwoven structures, and minor components are diopside and calcite. The major difference between "Rehe jade" and other serpentine jades is its red and yellow colour, which is caused by Fe element. It was suggested that the "Rehe jade" from Hebei Province is formed by the contact metasomatism between SiO2-rich magmatic rock and dolomitic limestone. It is a high-quality jade resource with high economic development and utilization value.

     

/

返回文章
返回