硅藻土的热谱特征  

THERMO-SPECTRAL CHARACTERISTICS OF DIATOMITE

作　　者：陈国玺[1] 张惠芬[1] 王辅亚[1] 冯璜[1] 

机构地区：[1]中国科学院广州地球化学研究所,广州510640

出　　处：《矿物学报》1995年第1期36-39,共4页Acta Mineralogica Sinica

基　　金：广东省科委资助;中国科学院广州分院联合资助

摘　　要：对广东省海康县等国内外23个硅藻土样品进行了DTA、TG分析。研究结果：海康县卜昌、美国和日本硅藻土呈现了典型的蛋白石DTA曲线和X射线衍射谱，说明样品纯度较高；徐闻县峙头、九亩和云南等地的硅藻土除了蛋白石的DTA和X射线衍射谱外，还含有较多数量的伊利石、蒙脱石和高岭石。取自九斗和田洋硅藻土矿床钻孔样品的DTA曲线含有较多数量的有机质。根据TG曲线对不同埋深硅藻土中有机质含量计算表明，有机质含量与埋深显示了有规律的变化，反映了硅藻土成矿时的沉积环境。Twenty-three diatomite samples from China and abroad have been investigated with DTA,TG and XRD techniques. The results show that the samples from Haikang, USA and Japan are typical opals and have higher purity; those from Xuwen and Yunnan contain considerab1e amounts of illite, montmorillonite and kaolinite. The drill hole samples from Jiudou and Tianyang are found containing some organic matter. As shown by TG curves, samples from different depths are different in organic content, indicating a sedimentary environment for diatomite mineralization.

关 键 词：硅藻土 X射线衍射 有机质含量 热分析 热谱 

分 类 号：P578.94[天文地球—矿物学]