mafic

Biotite is a subordinate constituent of the mafic and ultramafic rocks generally.

黑云母一般是镁铁质及超镁铁质岩石中的次要成分。

The studying degree of the predecessor is low to the Permian mafic-ultramafic rock.

前人对该地区二叠纪镁铁质—超镁铁质岩石的研究程度较低。

The mafic due to sodium zoisitization, its alteration products often with green color;

基性斜长石由于遭受钠黝帘石化，其蚀变产物常带绿色色调；

In general, acid plagioclase twin dense and flat, while the mafic twin is thin and not straight.

一般情况下，酸性斜长石双晶纹密集且平直，而基性斜长石的双晶纹较稀且不够平直。

Alkali mafic subvolcanic body occurring in Bijiashan-Tongdongwan consists of clastic rock and lava.

笔-铜碱性镁铁质火山岩体由碎屑岩和熔岩组成。