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New study documents aftermath of a supereruption,and expands size of Toba magma system
documents aftermath supereruption Toba magma system
2017/7/20
The rare but spectacular eruptions of supervolcanoes can cause massive destruction and affect climate patterns on a global scale for decades – and a new study has found that these sites also may exper...
Taking advantage of a rare orbital alignment between two of Jupiter’s moons, Io and Europa, researchers have obtained an exceptionally detailed map of the largest lava lake on Io, the most volcanicall...
中国北方有着众多新生代以来形成的火山群，为研究火山锥降解问题提供了良好条件。文章通过３０ｍ精度ＤＥＭ统计
了来自五大连池、柴河—阿尔山、诺敏河—奎勒河、新疆阿什库勒、大同五个火山群共４０座火山的锥体形态学参数Ｈｃｏ与Ｗｃｏ
值，并搜集了对应的锥体年代学数据对火山锥的降解过程开展研究。获得的主要认识如下：（１）对火山锥进行了Ｈｃｏ／Ｗｃｏ—年
龄分组，结果显示在五个火山群中具有实际喷发年龄的４...
UMD-led Study Finds Ancient Earth’s Fingerprints in Young Volcanic Rocks
UMD-led Ancient Earth’s Fingerprints Young Volcanic Rocks
2017/4/27
Earth’s mantle is made of solid rock that nonetheless circulates slowly over millions of years. Some geologists assume that this slow circulation would have wiped away any geochemical traces of Earth’...
日本樱岛火山灰玻璃碎屑形态特征研究
火山玻璃 表面形态 表面结构 日本樱岛
2018/4/12
火山灰年代学是控制地层年代最简单可靠的直接手段，近年来在磁性地层、构造演化和古气候环境、考古等研究中被广泛重视和应用，经常成为最关键的要素。然而对其在地层中的识别常常产生较大分歧，制约了对年代的控制及与此相关的许多科学问题的解决。火山玻璃作为火山灰中的常见和标签物质，是识别火山灰最直接可靠的材料。日本强烈的第四纪火山活动和清晰连续的火山灰沉积在这方面具有代表性。本文利用光学显微镜和扫描电镜，对日本...
南海北部晚新生代火山岩浆活动的运移系统被揭示（图）
南海北部 晚新生代火山岩浆 活动的运移系统 被揭示
2017/3/28
近日，夏少红研究员领导的海洋岩浆活动与地幔动力学学科团队，围绕南海海底岩浆活动与深部地幔结构开展详细研究，揭示了南海北部晚新生代火山岩浆活动的运移系统，相关成果在Gondwana Research、Earth and Planetary Science Letters和Journal of Geophysical Research等国际地学TOP期刊上发表。
Nature Geoscience报道南京大学地球科学与工程学院在南海海底火山成因研究合作成果（图）
Nature Geoscience 南京大学地球科学与工程学院 南海 海底火山 火山成因
2017/2/15
南京大学地球科学与工程学院、内生金属矿床成矿机制研究国家重点实验室陈立辉教授在南海海山玄武岩成因研究方面取得重要进展，相关成果“Evolution of carbonated melt to alkali basalt in the South China Sea”最近以长论文（Article）形式发表在国际著名期刊《Nature Geoscience》上（DOI: 10.1038/NGEO287...
文中从各类岩石磁化率、密度统计数据出发，对比分析不同地层和岩性的磁性、密度，指出在研究区内开展火山岩重磁研究具有有利的物性基础。在利用带通滤波方法对重磁异常进行位场分离，消除沉积盖层和区域场影响后，获得由火山岩引起的剩余重磁异常，位场分离结果显示，反映火山岩的局部重磁异常多呈串珠状NE向分布。同时采用水平总梯度和垂向导数等边界信息增强手段，圈定研究区内的断裂构造分布情况，划分出了4条向SE弧形突出...
2017年海底火山查普曼会议（Chapman Conference on Submarine Volcanism:New Approaches and Research Frontiers）
2017年 海底火山查普曼 会议
2017/1/20
Submarine volcanism remains underexplored and underexamined – ¾ of Earth lies beneath water, and a substantial majority of Earth’s volcanic eruptions take place in this subaqueous realm.This conf...
Holidaymakers concerned about fresh volcanic eruptions causing flight-disrupting ash clouds might be reassured by a study setting out the first reliable estimates of their frequency.While the Universi...
Underwater volcano's fiery eruption captured in detail by seafloor observatory
Underwater volcano fiery eruption captured seafloor observatory
2016/12/27
A sensor array off the Pacific Northwest coast has captured the cracking, bulging and shaking from the eruption of Axial Seamount, a nearly mile-high undersea volcano, in more detail than ever before....
Virginia Tech researchers explore gigantic volcanic eruptions that caused worldwide mass extinctions
Virginia Tech researchers volcanic eruptions caused worldwide mass extinctions
2016/11/29
A paper published in Nature Communications by Virginia Tech researchers confirms a major feature in the formation of large igneous provinces — massive worldwide volcanic eruptions that created in...
黑龙江省黑河地区广泛发育侏罗-白垩纪火山岩，但是该火山岩的岩石组合、成因和所表征的大地构造环境目前有很大的争议。本文对该套火山岩开展详细的岩石学、岩石地球化学等研究。该火山岩形成于早白垩世，主要以安山岩英安岩流纹岩为主，包含英安岩、安山岩、粗面岩、流纹岩、安粗岩、玄武安山岩、粗面英安岩、钾玄岩、歪长粗安岩，因此属于弧火山岩的组合。该区火山岩主要为亚碱性系列，岩石Na2O/K2O比值一般>1.2。A...
Enormous dome in central Andes driven by huge magma body beneath it
Enormous dome central Andes driven huge magma body beneath
2016/11/4
A new analysis of the topography of the central Andes shows the uplifting of the Earth's second highest continental plateau was driven in part by a huge zone of melted rock in the crust, known as a ma...
In 2010, Iceland's Eyjafjallajokull volcano -- its crater covered by glacier ice -- erupted, spewing clouds of ash that led to delays in flights to and from Europe. Now Katla, another Iceland volcano,...