摘要
红褐色"泰山玉"为"泰山玉"家族中的新发现亚种,以往文献中未见提及。采用常规测试手段及X射线粉末衍射、红外光谱、X射线荧光光谱、紫外-可见吸收光谱等方法,对红褐色"泰山玉"的物质组成、致色机理等方面进行了较为全面的研究。结果表明,红褐色"泰山玉"的主要矿物组成为叶蛇纹石,主体呈显微鳞片变晶结构,含有褐铁矿、磁铁矿、黄铁矿等杂质;初步认定红褐色为次生色,主要由褐铁矿所导致,并推测褐铁矿的形成为"泰山玉"矿体成矿后期残余热液交代、风化和成矿结束后各种表生风化作用的结果。
Reddish brown ＂Taishan＂ jade is a new subspecies of ＂Taishan＂ jade family; it was scarcely mentioned in previous literature as a discrete entity. The material composition and coloration mechanism of reddish brown ＂Taishan＂ jade are systematically studied by means of conventional methods, polarizing microscope, X-ray powder diffraction, infrared spectrometer and UV-Visible spectrometer. The test results show that the main mineral component of ＂Taishan＂ jade is antigorite, appeared as scaly blastic and massive texture, impure minerals include limonite, magnetite and pyrite etc. It is preliminarily confirmed that reddish brown is the secondary colour, which is caused by limonite. Considered the geological and weathering environment, it can be inferred that the metasomatism of residual hydrothemlal with weathering and supergene weathering after the later stage and finishing stage are the causes of limonite.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2014年第1期74-78,82,共6页
Bulletin of the Chinese Ceramic Society
