2017年6月20日,《美国科学院院刊》(PNAS)刊发文章《富二价铁的布氏岩在流速减缓的地幔中部环境下的稳定性》(Stability of ferrous-iron-rich bridgmanite under reducing midmantle conditions)称,来自亚利桑那州立大学的研究人员首次发现了深部地幔600~900英里处对流速度减慢的机制。地球是由圈层结构构成,其包括了地壳、地幔和地核3个主体部分。来自地核的热量驱动了地幔的缓慢 On June 20, 2017, the PNAS published an article entitled "Stability of ferrous-iron-rich bridgmanite under reducing midmantle conditions, said researchers from Arizona State University for the first time found a mechanism for slowing convective velocities at depths of 600 to 900 miles in the deep mantle. The Earth consists of a ring structure consisting of three main parts, the crust, the mantle and the earth’s core. The heat from the core drives the mantle’s slowness