论文部分内容阅读
通过美国劳伦斯伯克利国家实验室国家能源研究科学计算中心(National Energy Research Scientific Computing Center,NERSC)的超级计算机,美国科学家对过去20年间全球发生的273次强震的地震波数据进行了分析,然后对地幔柱进行了成像。借此,科学家们首次观察到地幔柱从地幔底部到上地幔的连续分布,它们在下地幔发生明显地分离,然后一直上升至地表1 000 km以下,最后在上地幔变细,发生偏转和弯曲。因此,当地幔柱上部与热点火山发生联系时,往往并不是垂直的。
Using supercomputers at the National Energy Research Scientific Computing Center (NERSC) at Lawrence Berkeley National Laboratory in the United States, U.S. scientists analyzed the seismic wave data of the 273 strong earthquakes that took place in the world during the past 20 years and then analyzed the mantle The column was imaged. As a result, for the first time, scientists observed the continuous distribution of mantle plumes from the bottom of the mantle to the upper mantle. They clearly separated in the lower mantle and then rose up to 1 000 km above the surface. Finally, the upper mantle became thinner and deflected and bent. Therefore, when the upper part of the mantle plume contacts the hot volcano, it is not always vertical.