perthitophyre

用法例句

The ore deposit was surrounded by fractures of NE and NW directions,and generically relat-ed to rhyolite porphyry,The early alterations are mainly of K-feldsparization and biotitiza-tion,and the laters are mainly of silication,sericitization and propylitization.

成矿主要与流纹斑岩有关。

It is found that the rolls loses stability and deforms into regular hexagonal pattern as the voltage increasing;then the decrease of voltage can lead to an instability of hexagonal pattern,and a transition to striped pattern occures.

在实验中,通过改变外界驱动电压发现:在升高电压的过程中,条纹斑图会发生失稳,并逐渐形成六边形斑图;形成规则的六边形斑图后,降低驱动电压,六边形斑图会失稳再次形成条纹结构。