beckite

The results show that there are two types,one is chalcedony-type silicified wood,which consists of cryptocrystalline quartz and a little granular quartz,with refractive index of 1.

采用偏光显微镜和红外光谱仪对缅甸硅化木样品进行研究,结果发现,其有两种类型,一种为玉髓硅化木,主要由隐晶质石英和少量的粒状石英组成,折射率为1。

The experiment indicates that the basalts containing chalcedony and microcrystalline quartz possess potential alkali reactivity and belong to typical alkali-silica reaction.

结果表明,由含有玉髓、微晶石英等矿物的玄武岩骨料具有潜在碱活性,且属典型的碱-硅反应。

The nodular chert consists of mainly of microquartz,length-fast chalcedony and megaquartz with minor length-slow chalcedony,euhedral dolomite rhomb and sparry calcite as well.

研究区燧石结核主要由微石英、负延性玉髓、粗晶石英组成,并含少量白云石、方解石及生物碎屑。