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本文用振动光谱和电子顺磁共振谱研究了云龙锡矿锡石的谱学特征。根据红外光谱的谱形、吸收频率和吸收峰强度特征,将云龙锡矿锡石的红外光谱划分成两种类型:A型谱和B型谱。红外光谱特征的研究结合宏观地质特征的研究表明:氧化物阶段锡石的红外光谱为A型谱,硫化物阶段锡石的红外光谱为B型谱。随着锡石成分和结构的变化,锡石的拉曼光谱的谱型、振动频率也发生变化,反映了锡石的成矿条件的差异。云龙锡矿锡石的EPR谱研究表明,云龙锡石中含有呈类质同象进入锡石晶格的V~(4+),根据V~(4+)的稳定场研究,云龙锡石主要形成于相对碱性和偏还原的条件下。
In this paper, the spectroscopic characteristics of cassiterite from Yunlong tin ore were studied by vibrational spectroscopy and electron paramagnetic resonance spectroscopy. According to the spectral shape, absorption frequency and absorption peak intensity of infrared spectroscopy, the infrared spectra of cassiterite in Yunlong tin ore are divided into two types: A type spectrum and B type spectrum. The study of infrared spectral characteristics combined with macroscopic geological characteristics shows that the infrared spectrum of cassiterite in oxide stage is Type A spectrum and the infrared spectrum of sulfide stone is B type spectrum. With the change of composition and structure of cassiterite, the Raman spectrum of cassiterite also changes its spectral frequency and vibrational frequency, which reflects the differences in the metallogenic conditions of cassiterite. The EPR spectra of cassiterite in Yunlong tin show that there are v ~ (4 +) ions in the cassiterite into the cassiterite lattice. According to the study of the stable field of v ~ (4 +), Formed under relatively alkaline and partial reduction conditions.