tuff

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；

The rock types include rhyolite, dacite and sedimentary volcaniclastic rocks, among which the lava tuff breccia was newly discovered in the 1 ∶ 50 000 region.

岩石类型为流纹岩、英安岩和沉火山碎屑岩，其中的熔结角砾凝灰岩是本次1∶5万区调中的新发现。

Discovery of Quaternary porous tuff and its significance in mineral materials

第四纪多孔凝灰岩的发现及其矿物材料学意义

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。

The Effects of the Process of Stresses on Mechanical Properties of Tuff Rocks

应力途径对凝灰岩力学特性的影响

Leaching characteristics of a tuff type uranium ore rich in fluorite

富含萤石凝灰岩类型铀矿石的浸出特性

Testing Study on mechanical properties of tuff, granite and breccia after high temperatures

3种岩石高温后力学性质的试验研究

The acidic tuff section owns gold element with average content of 110.

其中的酸性凝灰岩段金元素平均值110.

Test Study on the Mechanical Property of Tuff at Different Strain Rates in Freezing Condition

冻结状态多级应变速率下凝灰岩力学特性的试验研究

Rich mineral resources, granite, tuff, 15 kinds of marble, and other non-metallic mineral and metal mining.

矿产资源丰富, 有花岗石 、 凝灰岩 、 大理石等15种 非金属 矿和金属矿.

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。

Experimental study on longitudinal wave characteristics of tuff, granite and breccia after high temperature

三种岩石高温后纵波波速特性的试验研究

Mountain mainly by rhyolite and tuff composition, there are local granite.

山体主要由流纹岩和凝灰岩构成, 局部有花岗岩.

The total displacement of rock slope along the tuff layers gently inclined fault zone and the steep-dip slip fault zone of the crack, is typical slip-crack model. 4.

边坡岩体的总位移形式表现为沿缓倾角凝灰岩质层间错动带的滑移和沿陡倾角断层破碎带的拉裂，是较为典型的主滑移-次拉裂模式。

None the less, quickly he came back tuff in 2001 with courage and determination.

很快他依然带着勇气与坚定在2001年再次回归.

The Machadodorp tuff and agglomerate, which is higher-lying than the Ongeluck lave, is known only from the Eastern Transvaal.

层位较昂格鲁克岩流为高的马却多多普凝灰岩及集块岩，只见于德兰士瓦东部。

Its heat reservoir is composed of Yanshanian granite-porphyry and tuff of Mesozoic.

热储由中生代燕山期花岗斑岩、凝灰岩组成.

Research and application of fracturing fluid system of tuff reservoir

凝灰岩储层压裂液体系的研究与应用

Mainly is basalt and tuff, secondly become for the alteration basalt and andesite.

主要为玄武岩和凝灰岩, 其次为蚀变玄武岩和安山岩.

Experimental Study on Fluid Permeation Evolution in Whole Failure Process of Tuff

凝灰岩破坏全过程渗流演化规律的实验研究

A systematic discussion of stratabound feature of tuff-type gold deposits, southwest Guizhou is conducted.

本文系统讨论了黔西南凝灰岩型金矿的层控特征.

The tuff is a kind of predictable and new-type nonmetallic minerals resource.

凝灰岩是一种可预见的新型非金属矿产资源.

Physical and chemical features of tuff and its development and Application

凝灰岩的物理化学性质及其开发利用

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。

For the first time, we make use of thermoluminescence technique to demarcate variegation boulder bed which is the district corresponding period sediment guiding bed, the top appear multilayer ash tuff which have similar thermoluminescence parameter;

首次利用热释光技术标定了杂色砾岩层为区域同期沉积的标志层，其上部出现的多层凝灰岩具有相似的热释光参数；

In the study, the researchers from Vanderbilt University and the University of Chicago analyzed dozens of small quartz crystals, remnants from the original underground magma, from the Bishop Tuff.

在这项研究中，来自范德堡大学和芝加哥大学的研究者们分析了几十块小石英晶体，这些石英晶体采自主教凝灰岩，是地下岩浆喷射而出后的残余物质。

For tuff and granite, the peak strain increases with temperature.

对于峰值应变，熔结凝灰岩、花岗岩的峰值应变随温度的升高而大幅度的增加；

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.

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。

This kind of rock is called tuff.

这里的岩质呢是凝灰岩.