Trachyte is an igneous volcanic rock with an aphanitic to porphyritic texture. It is the volcanic equivalent of syenite.
例句与用法
1.
The fractures in trachyte are better developed than that in the basalt 其中，粗面岩中裂缝的发育程度较玄武岩要好。
2.
Through rock mechanics analysis , basalt has the most compression strength , while that of trachyte is relatively weaker 经岩石力学分析，玄武岩抗压强度最大，粗面岩抗压强度相对较弱。
3.
Though matrix material from basalt is better than trachyte , the pore throats of trachyte reservoirs are better developed than basalt in respect of pore structures ; the overflow reservoirs have the best petrophysical conditions in trachyte and then the expulsion facies is the next 但从孔隙结构特征看，粗面岩储层孔喉较玄武岩发育程度好，粗面岩中以溢流相储层物性条件最佳，喷发相次之。
4.
Several analysis methods such as casting slice , scanning electron microscope , porosity and permeability data , mercury injection data and density of fissures are used to study the reservoir properties of volcanic rocks in huang - yu - re area , the east sag of liaohe basin . volcanic rocks in this area are mainly composed of basalt , diabase , tuff and trachyte . the dominating type of volcanic reservoir space includes secondary solution pores and structural fissures 通过火山岩的常规物性分析压汞分析和裂缝密度分析，结合铸体薄片和扫描电镜，研究了辽河油田黄于热地区的火山岩储层物性特征，认为该区火山岩储层岩石类型主要有玄武岩辉绿岩凝灰岩和粗面岩，主要储集空间类型为次生的构造裂缝和溶蚀孔缝。
5.
Through observation , description , slice identification of cores and chemical analysis of whole rock , it is determined that the central volcanic rocks of the eastern depression are classified as four major types , i . e . basalt , trachyte , tuff and cataclasite of sedimentary volcanic rocks , in which trachyte is of basic series and potassium rock type 通过岩心观察、描述，岩心薄片鉴定，全岩化学分析等资料，确定东部凹陷中段火山岩岩石类型分为4大类：玄武岩、粗面岩、凝灰岩和沉火山碎屑岩类，其中粗面岩类属于碱性系列、钾岩类型。
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