2012年岩土工程师基础知识:岩石的鉴定(7)
2、浅成岩(包括次火山岩)的野外鉴定浅成岩(包括次火山岩)的野外鉴定,大致可采用与深成岩相似的方法。浅成岩由于结晶细、结构变化大,因此对斑晶的矿物成分和结构应给予特别注意。野外鉴定浅成岩可参照表3
表3 浅成岩(包括次火山岩)野外鉴定表
超基性岩
基性岩
中性岩
酸性岩www.ExamW.CoM
碱性岩
色率>90
色率90~35
色率35~15
色率
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