lavas的例句大全

The characteristics and genetic mechanism of Porphyroclastic lavas in southeastern China

中国东南部碎斑熔岩基本特征及成因机理的探讨

a study on the middle proterozoic pillow lavas in yuanqu, shanxi

山西垣曲中元古代枕状熔岩的研究

the discovery of pillow lavas is of great significance in precise determination of the forming age and living environment of the animals and plant fossils.

这些枕状熔岩的发现对于准确确定珍稀动植物化石的形成时代和环境具有重要意义。

they represent a disastrous event and reflect the fact that the ancient lake where the pillow lavas were formed was then in the maximum expansion with rather deep water.

它们除了代表一次灾变事件外，还反映出形成枕状熔岩的古湖泊接近最大湖泛期，并巨水体较深。

Eocene lavas belong to high K Calc alkaline ( HK CA) series and those of Miocene to shoshonite ( SHO) series.

渐新世火山岩为高钾钙碱性系列，中新世岩石属于钾玄岩系。

For the basic lavas with subduction-type signatures, we can judge whether they are really island-arc or active continental margin basalts by studying Zr contents and Zr/ Y ratios or Zr/ Y-Zr diagram.

对于那些具有消减带信号的基性熔岩，可以根据Zr含量和Zr/Y比值，或利用Zr/Y-Zr图解，判断它们是否真正是岛弧或活动大陆边缘玄武岩。

the higher alkali volcanic lavas are the results of twice cyclic volcanic activities, the grey purple lava dominating in the early cycle and the grey green in the late cycle. the two kinds of lava are similar in mineral aggregate and texture and structure.

偏碱性火山熔岩为两次火山活动旋回产物，早期火山旋回以灰紫色火山熔岩为主，晚期火山旋回以灰绿色火山熔岩为主，二者在矿物或分、结构构造上均相似。

The lake was ponded by lavas a long time ago.

这条湖是很久以前熔岩堵塞河道形成的.

The unusual primitive compositions of the West Mata eruption lavas have much to tell us.

西玛塔火山喷发熔岩的不同平常的原始组分告诉我们许多秘密.

The lake was possibly ponded by lavas.

这个湖可能是熔岩堵塞河道形成的.

Such lavas also once came from the volcanoes in the Cascade Range in Washington.

在华盛顿州的喀斯喀特山脉的火山也喷出过这样的熔岩.

Previously, researchers had found nearby pillow lavas , bulbouslava flows that form-under water.

以前, 研究人员在附近发现了形成于水下的枕状熔岩和球根状熔岩流.

Pyroclastic rocks are a kind of transitional and complex rocks between lavas and sedimentary rocks.

摘要火山碎屑岩是介于溶岩和沈积岩之间的过渡类型岩石,岩类复杂.

The Late Jurassic-Early Cretaceous activity produced basaltic and basaltic andesitic lavas ( 146Ma, 137Ma), followed by gabbro intrusion ( 135Ma) and aplite dyke ( 129Ma).

侏罗纪末～早白垩世初的火山活动除有熔岩（146Ma，137Ma）喷出外，还发育有辉长岩侵入体（135Ma）和辉绿岩岩墙（129Ma）等次火山岩。

Platinum-group element ( PGE) data for global arc lavas are very scarce.

全球岛弧火山岩的铂族元素数据非常少。

The major, trace element and isotope geochemical characteristics of the basic lavas of the Kule Lake ophiolite indicate that the basic lavas have a N-MORB affinity, possibly suggesting a small ocean basin environment for them.

本文通过对蛇绿岩基性熔岩的主量、微量和同位素地球化学研究，结果表明库勒湖蛇绿岩具N-MORB特征，推测其形成于小洋盆环境。

The lavas mainly include basalt, dolerite, fumarolic, amygdaloidal andesite, trachy-andesite and as well as rhyolite.

火山熔岩类主要包括玄武岩、粗面玄武岩、气孔杏仁状安山岩、粗面安山岩、流纹岩等。