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5楼
发表于 2013-1-23 14:30
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转帖：http://www.guokr.com/post/331469/
不确定是否该发这：关于长白山最近的火山活动
火星研究家 行星科学博士/轮滑教育家/音乐爱好者 4月前
今天例行查文献的时候，在地球物理研究快报（GRL）上发现了这么一篇文章，第一作者是中国地震局地质研究所活动火山研究室火山地质组组长许建东。文章列举了自2000年以来对长白山的连续监测，并对2009年以来火山的进一步活动表示了极大关注。摘要如下：
Recent unrest of Changbaishan volcano, northeast China: A precursor of a future eruption?
Key Points
The unrest of Changbaishan volcano during 2002-2006 was detected
The unrest process may be a long term precursor of eruptive activity in future
Need to keep close watch on the volcano
Jiandong Xu
Key Laboratory of Active Tectonics and Volcano, Institute of Geology, China Earthquake Administration, Beijing, China
Changbaishan Volcano Observatory, Antu, China
Guoming Liu
Changbaishan Volcano Observatory, Antu, China
Jianping Wu
Changbaishan Volcano Observatory, Antu, China
Institute of Geophysics, CEA, Beijing, China
Yuehong Ming
Changbaishan Volcano Observatory, Antu, China
Institute of Geophysics, CEA, Beijing, China
Qingliang Wang
Changbaishan Volcano Observatory, Antu, China
Second Monitoring Center, CEA, Xi'an, China
Duxin Cui
Second Monitoring Center, CEA, Xi'an, China
Zhiguan Shangguan
Key Laboratory of Active Tectonics and Volcano, Institute of Geology, China Earthquake Administration, Beijing, China
Bo Pan
Key Laboratory of Active Tectonics and Volcano, Institute of Geology, China Earthquake Administration, Beijing, China
Changbaishan Volcano Observatory, Antu, China
Xudong Lin
Key Laboratory of Active Tectonics and Volcano, Institute of Geology, China Earthquake Administration, Beijing, China
Junqing Liu
Changbaishan Volcano Observatory, Antu, China
Over 12 years of continuous monitoring of Changbaishan volcano in the border region of China and North Korea by means of volcanic seismicity, ground deformation, and volcanic gas geochemistry yields new evidence for magmatic unrest of the volcano between 2002 and 2006. In this so-called “active period,” the frequency of volcanic earthquakes increased by about 2 orders of magnitude compared to that of the background “inactive periods.” The active period was also accompanied by ground inflation, high values of CO2, He, H2, and high ratios of N2/O2 and 3He/4He in volcanic gases released from three hot springs near the caldera rim. The monitoring evidence implies pressurization of the magma chamber, possibly caused by incremental magma recharge. The ground deformation data from both GPS and precise leveling are modeled to suggest the corresponding deformation source is at 2–60 km depth beneath the volcano's summit, where earthquake swarms were detected in 2002 and 2003. Our findings suggest that the magma chamber beneath Changbaishan volcano has awakened and resumed activity after remaining dormant since AD 1903. There is an urgent need to keep close watch on this active and very hazardous volcano in northeast China. |
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发表于 2013-1-23 12:36
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