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宁芜盆地中生代陆相火山岩发育广泛、种类繁多,其中的一些次火山岩与铁、铜等矿产的生成有密切关系.因此,正确的鉴别和认识这种次火山岩就是一项有现实意义的工作.一般认为,次火山岩是岩浆的超浅成侵入体.它与火山岩除产状有别外,具有同源、同时、同空间、同组分、同外貌的特点.根据这个概念,判别次火山岩主要应弄清野外产状,并确定是否有相关的火山岩存在.但是,在覆盖层厚、岩石出露不好的情
The Mesozoic continental volcanic rocks in Ningwu basin have a wide range and a great variety of volcanic rocks, some of which are closely related to the formation of iron, copper and other minerals. Therefore, the correct identification and understanding of this subvolcanic rock is a practical work. Subvolcanic rocks are generally considered to be ultra-shallow intrusions of magma, distinguishing from volcanic rocks except those of volcanic origin, which are of the same origin, meanwhile same in space, same composition and same in appearance. It is important to understand the nature of the outcrop and determine if there are any associated volcanic rocks present. However, if the overburden is thick and the rock is not well exposed