安粗岩（latite）相当于二长岩的喷出岩。其矿物成分介于粗面岩与粗安岩之间。矿物成分的特点是，斑晶中碱性长石与斜长石含量相近，或除斜长石斑晶外，不含有碱性长石，或斑晶为斜长石，而基质为微晶碱性长石。
郯庐断裂带中生代火山活动主要发生在早白垩世，形成了一套以橄榄安粗岩系为主的火山岩。
Mesozoic volcanic activities of the Tan Lu fault zone mainly appeared in Early Cretaceous and resulted in a set of volcanic rocks characterized by shoshonite series.
花岗质岩石的地球化学类型属钙碱系列的改造型花岗岩和安粗岩系列的花岗岩，具有金的潜在含矿性。
The geochemical types of granitic rocks belonging to the regenerated granite of calc-alkali series and granite of latite series are good for latent ore-forming of gold.
火山岩岩石组合以碱性玄武岩-粗安岩-碱性流纹岩为主。
The rock assemblages of the Bayinbuluke formation are mainly alkaline basalt - thick andesite - alkaline rhyolite.
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