摘要
滇东磷矿床中粘土矿物分布比较广泛,在震旦系到寒武系各地层中均有分布。本文仅讨论下寒武统渔户村组中谊村段磷矿层夹层及顶、底板页岩中的粘土矿物。经化学分析、X射线衍射、红外吸收光谱分析、差热分析及电子显微镜分析,确定长区磷矿床中的粘土矿物主要是伊利石和伊利石/蒙脱石不规则混层矿物,其次为高岭石、变埃洛石,含少量海绿石。通过对混层矿物的研究,为本区矿物间的转化、沉积环境及成岩作用的探讨提供了重要的资料。
The clay minerals of phosphate ore deposit are widespread in Sinian and Cambrian strata. This paper deals only with the clay minerals in the shales of horse, bottom and apical plate of phosphate layers of Zhongyicun Member, Yuhucun Group, Lower Cambrian. Based on the chemical, X-ray diffraction, infrared absorption spectroscopic, differential thermal and electron microscopic analyses the clay minerals are determined to be mainly illite and illite/montmorillonite mixed-layer, and then, kaolinite, endellite and some glauconite. the study of mixed-layer clay minerals provides important basis for the knowledge of mineral conversion, sedimentary environments and diagenesis in this area.
出处
《矿物岩石》
CAS
CSCD
1993年第1期18-24,共7页
Mineralogy and Petrology
关键词
磷矿床
粘土矿物
伊利石
蒙脱石
phosphate ore deposit in East Yunnan
clay minerals
illite/montmorillonite mixedlayer
conversion between clay minerals
