volcanic tuff

  • volcanic tuff
  • 释义

    火山凝灰岩

纠错 数据更新时间:2025-11-14 16:17:17
1、

In the southeast Jiangxi volcanic terrain are mainly developed Middle-Late Jurassic mildly acidic volcanic clastic rocks and volcanic lava, of which the most widely distributed are the explosive-effluent rhyolitic crystal fragment tuff lava;

赣东南火山岩区主要发育侏罗纪中、晚世中酸性火山碎屑岩&火山熔岩,其中以爆溢相产出的流纹质晶屑凝灰熔岩分布最广;

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2、

Sedimentary pyroclastic rocks are mainly sedimentary tuff and sedimentary volcanic breccia.

沉火山碎屑岩,包括沉凝灰岩和沉火山角砾岩。

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3、

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。

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4、

Contemporaneous volcanic activity is represented by basic to intermediate lava and tuff.

同时期的火山活动性是由中性熔岩与凝灰岩呈基性而体现出来的.

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5、

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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6、

The thrid part are tuff, ferruginous dolomite, crystal tuff and volcanic breccia.

第三段以凝灰岩、铁质白云岩、晶屑凝灰岩、火山角砾岩为主。

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