查询词典 volcanic tuff

Situated on the margin of the Lishui volcanic basin, Jiangsu, the Aijingshan strontium deposit is controlled by the F 2 fault and the crystal tuff and andesitic porphyrite of the Longwangshan group.

江苏溧水爱景山特大型锶矿床位于溧水火山岩盆地的边缘，受F2断层、龙王山组晶屑凝灰岩、安山玢岩控制。

We mainly supply stone materials such as Hexagon Stone,Slabstone,Pumice,Stone Carving,Sandstone,Marble,Tuff, Granite,Stone for river banks,Volcanic rock,Talc etc,and Sleepers,casting products made of steel and iron.

经营各种六方石、铁平石、浮石、石雕、砂岩、大理石、玉砂利、凝灰岩、花岗岩、间知石、火山岩、滑石等石材制品以及枕木和钢铁铸件产品，并相信其中有些产品贵公司会感兴趣的。

The matrix consists dominantly of mylonized volcanic rocks, tuff and strongly fragmented pyroclastic rocks.

基质主要有糜棱岩化的火山岩、凝灰岩和破碎强烈的火山碎屑岩。

Meanwhile, the volcaniclastic rocks were modificated by the thermal fluid activity, for example, sericitization of plagioclase, chloritization of volcanic detritus in andesitic detris tuff; in the tufaceous mud, the thermal fluid activity accelerates "maturating" of the organic carbon by heating; and the trace elements show an anomaly in the wall rocks.

同时，受热流体活动的影响，热流体对火山碎屑岩具有一定改造作用，如在安山质岩屑凝灰岩中，斜长石绢云母化、火山岩岩屑绿泥石化明显；在凝灰质泥岩中，热流体对围岩中有机碳具有明显的"催熟"加热作用，微量元素则出现异常现象。

By contrast, the Jilinbaolige lead - zinc - silver ore deposit was hydrothermal deposit which related to Indosinian intermediate-acidic magmatism. Tuff which was one of host rock of the deposit was intermediate volcanic rocks belong to potassium and aluminium rich tholeiite series.

相比之下，吉林宝力格铅—锌—银矿床的容矿围岩之一的凝灰岩属富钾和铝、拉班玄武岩系列的中性火山岩。

He Youngest Toba Tuff eruption was the greatest single volcanic event which occuned in the Quaternary, dated back to 74 ± 2 ka., and bad important impacts on global environmental and climatic changes.

oba火山活动是第四纪最大的火山事件，其中最年轻的约0.074Ma的火山活动被称为YTT事件。

Comprehensive research has shown that structure can make some conceal environments of formation of volcanic ash tuff in space.

构造能在空间形成一个隐伏的环境，而这种环境正是火山尘凝灰岩赋存的重要条件。

The formation is the eroded remains of a volcanic tower known as a tuff cone.

这种构造是被称为凝灰锥的一种火山作用形成的塔状结构受侵蚀后的遗迹。

Volcanic ash settles quickly to form extensive beds of tuff, many of which contain perfectly preserved fissils .

火山灰迅速降落形成了大面积的凝灰岩岩层，其中很多岩层含有保存完好的化石。

The two volcanic materials are similar but are also different ①the partition mode of rare-earth element is similar to that of the basalt.②the increase content of the rare-earth element content in transitional layer shows that it enrichs in this segment due to the volcano events. Moreover, the comparability of the partition mode shows that the volcano-genic materials and the basalt are of the same source.③low Eu anomaly different from the high Eu anomaly of medium-acidic tuff in Meishan section, that show that their formation is different④there are plentiful basalt detritus.⑤there are enrichment of the Ti element.⑥the lower content of siderophile element of Ni and Co, especially in the transitional layer, show that there were not extraterrestrial events and big scale basic or ultrabasic volcano eruption events in this area. These characteristics show that the sedimentary source of Xuanwei Formation and Kayitou Formation is basalt.

1稀土元素配分模式与玄武岩类似；(2)稀土元素含量在异常层的增加反映了火山事件导致了它在该段地层中的富集，而配分模式的相似性反映了火山物质来源与玄武岩具有同源性；(3)低"Eu"异常区别于煤山剖面的中酸性凝灰岩高"Eu"异常模式，说明界线粘土岩成因也不同于煤山剖面的界线粘土；(4)大量的玄武岩岩屑；(5)Ti元素的富集；(6)亲铁元素Ni和Co含量较低，特别是在界线异常层含量降低，表明本区在界线处可能并不存在地外事件和大规模基性、超基性火山喷发事件，这些特征反映本区宣威组和卡以头组物质来源主要为玄武岩。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。