搜索结果: 106-120 共查到“火山学”相关记录469条 . 查询时间(0.491 秒)
火山渣锥是白头山（或长白山）火山喷发的重要产物，主要沿熔岩台地周边呈圆锥状寄生小火山锥体分布。野外特征显示，火山渣是火山渣锥的重要组成；岩石手标本显示，火山渣具有气孔构造，样品自顶部至底部，颜色从赤色、赤褐色，向褐色、灰色发生转变。地球化学特征表明，火山渣岩性包括玄武岩、粗面玄武岩、玄武岩质粗面安山岩、粗面安山岩岩，具有较高SiO2（46.22%~55.38%），Al2O3含量（15.28%~22...
Volcanic eruption masked acceleration in sea level rise
Volcanic eruption acceleration sea level rise
2016/8/11
The cataclysmic 1991 eruption of Mount Pinatubo in the Philippines masked the full impact of greenhouse gases on accelerating sea level rise, according to a new study."These scientists have disentangl...
中国玛珥资源与科研成就世界瞩目
中国 玛珥资源与科研成就
2016/8/2
第六届国际玛珥会议2016年7月30日至8月3日在中国吉林长春召开，此次会议聚焦玛珥（一种火山类型）与环境变迁。来自意大利、法国、英国、俄罗斯等16个国家的火山地质及地化学家参会，就各国玛珥火山的构造和玛珥湖的沉积特征及其对重建古环境和古气候的价值等进行了交流探讨。参会者还考察了我国内蒙古阿尔山—柴河火山区、吉林龙岗火山区以及长白山天池火山区。
Super-eruptions may give only a year’s warning before they blow
Super-eruptions only a year’s warning
2016/8/1
Super-eruptions–volcanic events large enough to devastate the entire planet – give only about a year’s warning before they blow.That is the conclusion of a new microscopic analysis of quartz crystals ...
When dormant volcanoes are about to erupt, they show some predictive characteristics—seismic activity beneath the volcano starts to increase, gas escapes through the vent, or the surrounding ground st...
UW Scientists Gain Supervolcano Insights from Wyoming Granite
UW Scientists Gain Supervolcano Wyoming Granite
2016/6/12
Geophysical monitoring of the ground above active supervolcanoes shows that it rises and falls as magma moves beneath the surface of the Earth. Silica-rich magmas -- like those in the Yellowstone regi...
Supervolcanoes like Yellowstone may have been more active in the past
Supervolcanoes Yellowstone more active in the past
2016/6/12
Geophysical monitoring of the ground above active supervolcanoes, like the one located in Yellowstone National Park, shows that it rises and falls as magma moves beneath the surface of the Earth.Magma...
火山喷发和工业粉尘影响全球变暖
火山 工业粉尘
2016/5/17
日本东京大学的研究小组最近发表在《自然气候变动》杂志上的一篇文章称，过去80年间，热带西太平洋海面水温数十年规模的气候变动，是由火山喷发及人类工业活动产生的硫酸性浮游粉尘所引起的。这首次证明，硫酸性浮游粉尘的大量排放对太平洋气候变化具有重大影响，为研究过去及未来的十年规模气候变化原因提供了重要依据。
研究小组称，自2000年以来，全球地表气温上升出现变缓趋势。科学家们认为，这种现象主要是由赤道信...
火山地层界面的储层意义——以松辽盆地南部火石岭组为例
喷发不整合界面 界面控储 储层意义
2016/5/17
基于岩心、薄片、物性及核磁测井T2谱等资料,从盆地火山地层界面分类及测井识别入手,开展火山地层界面与储层分布关系的研究,探讨了火山地层界面的控储机理。松南王府断陷火石岭组火山地层界面可划分为2级3类:喷发间断不整合界面构成一级界面,喷发整合和喷发不整合界面构成二级界面。火山地层界面与储层关系密切,距喷发间断不整合界面越近,储层物性越好,反之则越差,优质储层往往发育在喷发间断不整合界面之下30 m之...
Simultaneous determination of 58 major and trace elements in volcanic glass shards from the INTAV sample mount using femtosecond laser ablation-inductively coupled plasma-mass spectrometry
volcanic glass tephra LA-ICP-MS element abundance femtosecond lasert
2017/4/10
Four volcanic glass samples on the INternational focus group on Tephrochronology And Volcanism (INTAV) sample
mount described by Kuehn et al. (2011) were analyzed to establish a new methodology for m...
Indication of hydrothermal deposits and ore area on caldera floor and shallow sub-seafloor of the Bayonnaise knoll, based on high-resolution acoustic investigation
hydrothermal deposits high-resolution acoustic observation AUV sub-seafloor SBP
2017/4/10
The Bayonnaise knoll, an active submarine volcano belonging to an actively rifted part of the Izu-Bonin volcanic arc,
exhibits hydrothermal ore deposits on its caldera floor in a region known as the ...
中国科学家揭秘地球上最大火山
中国科学家 地球 最大火山
2016/3/23
2016年3月22日，记者从中国科学院获悉，中国科学院南海海洋研究所林间团队张锦昌与国际科学家合作，揭示了“地球上最大火山”——大塔穆火山深部结构。大塔穆火山自被证实为“地球上最大火山”以来，曾被评选为“年度十大科学新闻”。该火山作为全球海底火山的经典代表，对研究火山结构、火山形成机制、岩浆活动特征、板块边缘过程、地壳均衡以及洋中脊-地幔柱相互作用等一系列地球动力学问题都有着重要意义。
Study challenges widely accepted theory of Yellowstone formation
challenges widely theory of Yellowstone formation
2016/2/23
Understanding the complex geological processes that form supervolcanoes could ultimately help geologists determine what triggers their eruptions. A new study using an advanced computer model casts dou...
新研究显示恐龙灭绝可能并非火山喷发导致
恐龙 火山喷发
2015/11/24
对于史前地球出现的物种大灭绝事件，有一种说法是火山喷发所致。但一项2015年11月23日发表在英国《自然·地球科学》月刊网络版的研究说，火山喷发对当时地球环境影响或许要比想象中小很多。
New ‘geospeedometer’ confirms super-eruptions have a short fuse（图）
geospeedometer super-eruptions short fuse
2015/11/12
Repeatedly throughout Earth’s history, giant pools of magma greater than 100 cubic miles in volume have formed a few miles below the surface.They are the sources of super-eruptions – gigantic volcanic...