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在过去的数百年间,人们普遍相信“岩浆房”存在于在火山地壳的内部,如仓库一般储藏着大规模处于熔融状态的岩浆。但从本世纪初以来,随着人们对火山过程和岩浆活动的理解不断加深,该传统理论逐渐被一个新的模型所替代,即:跨地壳的岩浆系统主要由晶粥主导;火山是一个由晶粥组成的、垂直扩展且不稳定的系统,而熔融物质仅存在于整个岩浆系统的最顶部。该模型的提出基于对大量现存火山的物理化学、岩石学、火山学研究以及地质观察...
地磁场是地球最古老的特征之一。《科学》杂志列出的125 个需要回答的科学问题,以及美国国家研究理事会发布的《时域地球——美国国家科学基金会地球科学十年愿景(2020-2030)》第1个科学优先问题,将“地磁场如何产生和如何倒转”列入其中。古地磁研究表明,地磁场倒转频率可能受到核幔边界热状态的影响,呈现地磁极性频繁倒转与数百万年保持不变的超静磁期的特征。160 Ma以来地磁极性年代可以分为四个阶段,...
构造古地理演化与古生物多样性变化事件存在的因果关系一直是研究地球演化历史中引人注目的科学问题。在二叠纪时期,东亚地区几乎同时发生了两方面重要的地质事件,一方面是古亚洲洋的闭合形成了索伦缝合线,其演化决定了东亚大地构造基本格架的形成;另一方面是古赤道生物区和北方生物区的生物多样性变化,主要包括瓜德鲁普晚期海洋底栖动物大灭绝以及华夏植物群和安加拉植物群的混生事件。许多研究表明索伦缝合线是一条重要的生物...
The autumn 1919 Torremendo (Jacarilla) earthquake series (SE Spain)
Jacarilla earthquake Moment magnitude Environmental effects Aftershock series Macroseismicity
2015/8/14
On 10th September 1919 several slightly damaging earthquakes struck the towns of Torremendo, Jacarilla (near Alicante, SE-Spain) and others nearby. Available magnitude estimations for the largest two ...
The 11 May 2011 earthquake at Lorca (SE Spain) viewed in a structural-tectonic context
earthquake at Lorca structural-tectonic context
2014/12/31
The Lorca earthquake of 11 May 2011 in the Betic Cordillera of SE Spain occurred almost exactly on the Alhama de Murcia fault, a marked fault that forms part of a NE-SW trending belt of faults and thr...
Continuous radon monitoring in the Jowshan hot spring as an earthquake precursor, SE Iran
earthquake precursor Jowshan hot spring continuous monitoring
2017/4/12
In this paper, we present the results of the first experience for spring water 222Rn concentration continuous monitoring
in Jowshan hot spring, SE Iran, from December 2007 to July 2008. This hot spri...
Petrogenesis of Early Cretaceous silicic volcanism in SE Uruguay: The role of mantle and crustal sources
Uruguay Paraná-Etendeka rhyolite lower crust crustal contamination
2017/8/9
Early Cretaceous (~129 Ma) silicic rocks crop out in SE Uruguay between the Laguna Merín and Santa Lucía basins in the Lascano, Sierra São Miguel, Salamanca and Minas areas. They are mostly rhyol...
将时空守恒元/解元(CE/SE)方法推广到二维孔隙介质多相流问题的数值计算中,采用人工压缩法耦合速度和压力,同时结合杂交粒子水平集方法捕捉物质界面.提出一套完整的二维欧拉型孔隙介质非稳态多相不可压缩黏性流动计算方案.通过对溃坝和液滴在重力作用下的运动和变形问题的数值模拟,验证了方法的精度和有效性.在此基础上,提出了一个新的孔隙介质两相流物理模型——双层流体顶盖驱动方腔流.
Temporal properties of seismicity and largest earthquakes in SE Carpathians
Temporal properties of seismicity largest earthquakes SE Carpathians
2009/11/9
In order to estimate the hazard rate distribution of the largest seismic events in Vrancea, South-Eastern Carpathians, we study temporal properties of historical and instrumental catalogues of seismic...