火山岩

MT ; volcanite ; comprehensive geophysical and geochemical exploration technology ; electromagnetic wave ; shield

大地电磁；火山岩；综合物化探技术；电磁波；屏蔽

Songliao basin ; volcanite ; seismic facies ; prediction

松辽盆地；火山岩；地震相；预测

They can crystallise when molten lava becomes a solid; they can be left behind as residues when water carrying dissolved elements evaporates, or they can be deposited in water when concentrations of dissolved elements get too high.

它们可以在熔化了的火山岩变成固体的时候结晶，或者可以在水中当溶解元素浓度积累到很高时候沉积出来。

A total of 29 groups of isotope age data such as Sr-Nd isotope age data and Nd model age data of igneous rocks, including granites, volcanic rocks, dyke swarms, cumulates, and ophiolites, formed in different periods of time are reported in this paper, which show the following two features:(1) igneous rocks including ophiolites formed in this area since 800 Ma BP all have high eNd and low Sri, with most Sri values centered in the range of 0.7045 to 0.7060 and eNd values in the range of 1 to 5, and (2) most of the TDM ages are in the range of 800 to 600 Ma, with only a few at 1000 Ma.

收集了本区不同时期形成的各类火成岩，包括花岗岩、火山岩、岩墙群、堆晶岩、蛇绿岩的Sr－N等30组同位素数据，从中可以看到以下两个特征：①研究区从800Mr以来形成的包括蛇绿岩在内的火成岩都有高εNd低Sri的同位素特征，绝大多数Sri集中在0.7065～0.7060之间，eNd集中在1～5之间。②TDM年龄较多集中在800 ～600 Ma，个别为1000 Ma。

Volcanic rocks of each cycle have their own features, reflecting different geneses.

不同旋回火山岩具有不同的地质、地球化学特征。

The volcanic rock that insulates the cave keeps the temperature at a comfortable level, between 63 and 68 degrees Fahrenheit, year round.

火山岩将洞穴和外界隔绝开，是温度维持在一个舒适的水平，全年温度介乎华氏63至68度之间。

At a distance of 2–3km from Zarshuran these anomalies can be ascribed to widespread outcrops of Tertiary volcanics.

在距离2 - 3公里，从zarshuran这些异常可以归因于普遍露头大专火山岩。

The sulfur and lead isotope compositions indicate that the ore_forming materials were mainly derived from the volcanic rocks and granodioritic porphyries.

硫_铅同位素指示成矿物质主要源于火山岩地层和花岗闪长斑岩脉。

Share a private moment with a red-footed booby as she regurgitates squid to nourish her insistent infant. Find an even more spectacular view from a bluff. Trek over the moonscapes8 created by lava formations.

你可以和一只红足鲣鸟分享一段私密时光，看她用反刍出来的鱿鱼喂养闹着吃食的幼鸟，也可以到峭壁边去领略更加壮丽的风光，或是流连于火山岩构造铸就的月表景象之中。

In North Tibet, the advanced subduction plate started to break off, which resulted in mixture of the crust materials and mantle materials, and formed the source region of richening molten materials. The large-scale volcanic activity appeared in the central-north part of the plateau.

高原北部，先行俯冲板片发生断离，其地壳物质与地幔物质混合，从而形成板内富集熔体的源区，并在高原中、北部形成大规模的火山岩。

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。