喷发

All the volcanic rocks present younger K-Ar age (less than 5Ma), which can be termed as Cenozoic rocks. In general speaking, volcansim can be dividied into two eruptive stages. In the first stage, volcanic rocks for Pliocene epoch (4. 4-5Ma) consist of basanite and tephrite, which distributed on Mt. Crater, Cape Bird, and southern bank of Bonney Lake; In the second stage, volcanic rocks for Quaternary (less than 1 Ma) are mainly composed of latite, which are distributed on Cape Rodeys and Cape Evens.On the basis of geochemical data such as major elements, trace elements , rare earth elements, isotope, microprobe analysis, combined with main achievement taken by previous researcher in this area, conclusions are drawn basically as follows

所喷发的火山岩K-Ar年龄值均小于5Ma，为新生代火山岩，大体上可以分为两个喷发阶段，第一个阶段为上新世火山岩(年龄值为4.4-5.0Ma)，主要由碧玄岩和碱玄岩组成，分布于罗斯岛上的克雷克特山、鸟角和泰勒谷的博尼湖南岸；第二阶段为第四纪火山岩(年龄值均小于1Ma)，主要由安粗岩组成，分布于罗斯岛上的罗德角和伊万思角，通过主要元素、微量元素、同位素结合电子探针以及前人的研究成果，我们大体上可以得出如下认识

The last eruption was in 1918, which makes the next overdue.

最后一次喷发是在1918年，这也使得下一次的喷发被延误了。

Is an intermittently eruptive hot spring; people fled from the erupting volcano.

间歇泉是一种间歇喷发的温泉；人们从正在喷发的火山那里逃散开去。

The difference of structural state in this feldspar is probably associated with ages and temperatures of volcanic eruptions.

天池火山全新世喷发物中长石结构状态特征的差异可能与火山喷发的年代、喷发温度有关。

Whether it's natural gas drilling unleashing a mud volcano that has engulfed 12 Indonesian villages or the eruption of Krakatoa in 1883 blanketing the world in enough particles to block out the sunshine and lower temperatures by more than a 1.8 degrees Fahrenheit (1 degree Celsius), volcanoes are among Earth's most destructive natural phenomena.

无论是天然气钻探引发的泥火山1喷发淹没了12个印尼村庄，还是1883年喀拉喀托火山爆发产生的微粒覆盖了全球，遮蔽阳光并使温度下降了超过1.8华氏度（1摄氏度）2，火山喷发都是地球最具破坏力的自然现象之一。

Mineralized materials can be leached out from them by supergene water.and each types of ore deposits will be formed at different palaeogeography circumstances.

把玄武岩划分为三个主要的喷发旋回，编制了各个喷发旋回的岩相古地理图，表明不同时期玄武岩的形成环境不同并有着不同的分布范围。

Paleoclimate evidence suggests that the Toba eruption, which occurred during the last ice age, emitted lots of sulfur dioxide--vastly more than Mount St. Helens did.

古气候方面的证据显示，多巴火山喷发发生在最后一个冰川期，喷出了大量二氧化硫，远超过圣海伦斯火山的喷发量。

HOST: The ongoing eruption of the Icelandic volcano with the unpronounceable name reminds us that it's been exactly 30 years since the bigger and deadly eruption of Mount St. Helens in Washington State.

主持人：对不能发音的名称与冰岛火山喷发不断提醒我们，它已经整整30年来的更大，致命的圣海伦火山喷发在华盛顿州。

The Philippines' most active volcano spewed volumes of ash today as the volcanology agency recorded at least five minor explosions and warned people against inhaling the fumes.

菲律宾最活跃的火山，今天（编按：12月16日）喷出大量的火山灰，火山学研究机构纪录到至少五次较小的喷发，并警告民众避免吸入火山喷发所产生的气体。

The eruptional intensities were strong at the two ends that turned to calderas at a later time.

火山口位于该区的中部，属于裂隙式喷发，弧形裂隙的两端喷发强度大，并在晚期形成了破火山口。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐