According to the analysis about the Shanghai Institute of Silicate facies showed purple Wong belongs kaolin - quartz - mica type, high iron content, the highest iron amounted to 8.83%.
根据上海硅酸盐研究所有关岩相的分析表明，紫砂黄泥属高岭—石英—云母类型，含铁量很高，最高含铁量达8.83%。
A group of clay minerals formed during the alteration of silicate minerals such as mica and feldspar and commonly found in Marine shales.
硅酸盐矿物(如云母和长石)的蚀变作用期间形成的一族粘土矿物，通常见于海相页岩内。
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