tuff

1.The ore-bearing rock is composed mainly of andesitic tuff and tuffite.

作者在赋矿层中首次发现了层状电气石岩。

2.The extrusive rock unit includes basalt, andesite, boninite and albitite as well as breccia and tuff.

喷出岩单元不由玄武岩组成，还包括安山岩、玻安岩、钠岩以及角砾岩、凝灰岩等。

3.The first rock is mainly andesite clinkering agglomerate, andesite breccia, dacite breccia, rhyolite breccia and rhyolite clinkering tuff.

正常火山碎屑岩亚类岩石类型主要为安山质熔结集块岩,安山质、英安质及流纹质火山角砾岩以及流纹质熔结凝灰岩。

4.Zhaocun bentonite deposit oringnated from tuff rich in volcanic hyalocrystalline,which underwent hydrolysis and alteration in Changxing county,Zhejiang province.The deposit has middle scale.

浙江省赵村膨润土矿是由富含火山玻璃质的凝灰岩原地水解蚀变形成的膨润土矿床,矿床具中型规模。

5.Research shows that the dawsonite in Hailaer Basin exists in both the eroded volcano tuff and sedimentary volcano tuff,and is paragenous with corrensite and allevardite frequently.

研究表明,海拉尔盆地的碳钠铝石存在于火山凝灰岩或沉积凝灰岩中,常与柯绿泥石和钠板石共生,形成凝灰质蚀变的特征标型矿物组合。