火山集块岩,火山块集岩;
A great mumber of melt inclusions are there in the quartz phenocrysts. The ore bodies of Emei pyrophyllite are located in rhyolitic crys-tal fragment tuff, ignimbrite and volcanic breccia ( agglomerate)-bearing tuff.
石英晶屑内熔融包裹体发育。峨嵋矿区矿体赋存于流纹质晶屑凝灰岩、熔结凝灰岩、含火山角砾(集块)凝灰岩中。
There are Cenozoic continental intermediate and acid volcanic rocks in the Tianshui area, western Qinling. The rocks are mainly composed of rhyolite, parts of rhyolitic ignimbrite ( breccia tuff), a little amount of breccia tuff and volcanic agglomerate.
西秦岭甘肃天水地区分布的新生代陆相中酸性火山岩,主要由流纹岩、部分流纹质熔结(角砾)凝灰岩及少量角砾凝灰岩、火山集块岩等组成。
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