贵州罗甸玉红外光谱特征及意义  

IR Spectrum Characteristics and Significance of Luodian Jade from Guizhou

作　　者：杨林[1,2] 林金辉[1] 王雷[2] 王兵[2] 杜莹[3] 

机构地区：[1]成都理工大学,四川成都610059 [2]国土资源部贵阳矿产资源监督检测中心,贵州贵阳550004 [3]贵州师范大学化学与材料科学学院,贵州贵阳550001

出　　处：《光谱学与光谱分析》2013年第8期2087-2091,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(41073085);贵州省2011年度社发攻关计划项目(黔科合SY字[2011]3146号)资助

摘　　要：选取了罗甸玉中一些典型样品,在进行FT-IR测试的基础上,对罗甸玉中透闪石晶体内部结构基团的振动归属进行了探讨。罗甸玉的IR研究结果证实,罗甸玉矿物组成主要为透闪石,这与其他测试结果吻合。但罗甸玉中透辉石840～860cm-1频率的吸收带的出现,这是在其他天然软玉的IR研究中未见报道的,也是罗甸玉矿物组成与其他软玉矿物组成的最大区别,为罗甸玉在成玉(即由透闪石岩向软玉转变)过程中残留透辉石所致,是揭示罗甸玉变质成因过程的重要矿物学证据,同时也表明罗甸玉的成玉过程与已发现的其他天然软玉相比存在一定差异,这一差异进一步揭示罗甸玉是一种新成因类型的软玉矿。In the present paper we selected some typical samples from Luodian jade to perform FTIR test in order to study the vibration attribution of crystals structure.The results confirm that the main mineral composition of Luodian jade is tremolite.Not only has it been not reported in other IR study on natural nephrite that the absorption bands at wave numbers between 840and 860cm -1 caused by residual diopside exist in Luodian jade with the process of tremolite rock transformed to nephrite,but is also the biggest difference between the Luodian jade and other nephrite.The results reveal important mineralogy evidence of metamorphism of Luodian jade,and on the other hand,it also shows that there is a certain difference in the process of nephrite change between Luodian jade and other natural nephrite.Moreover,it further suggests that Luodian jade is a kind of new genetic nephrite ore.

关 键 词：贵州 罗甸玉 红外光谱 透辉石 

分 类 号：P584[天文地球—岩石学]