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片岩和片麻岩区别
更新时间： 2020-09-12 00:00:00  

片麻岩是一种变质岩，而且变质程度深，具有片麻状构造或条带状构造，有鳞片粒状变晶，主要由长石、石英、云母等组成，其中长石和石英含量大于50%，长石多于石英。如果石英多于长石，就叫做“片岩”而不再是片麻岩。

片岩特征是有片理构造，是常见的区域变质岩石。原岩已全部重结晶，由片状、柱状和粒状矿物组成。一般为鳞片变晶结构、纤状变晶结构和斑状变晶结构。常见矿物有云母、绿泥石、滑石、角闪石、阳起石等。

关键词： 片麻岩 区别

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