常見例句Like the core of earth, the mantle can also be divided into two concentric layers, the lower mantle and the upper mantle. 就像地球的核部一樣。地幔也可分為兩個同心圓圈層，下地幔和上地幔。PREMA(FOZO) is a popular end member of mantle for all ocean island and flood basalts, probably representing the lower mantle. PREMA(FOZO)則是洋島玄武巖和溢流玄武巖公共端員。These forces change the configurations of electrons in the mineral ferropericlase in the lower mantle, making it "softer" than previously estimated. 這些力量改變了在低地幔中礦石低鐵黑硬綠泥石中電子的結(jié)構(gòu)，使其比之前估計的更“軟”。Comparing low degree geoid anomaly with mantle density anomaly, The authors think the earth shape asymmetry is mainly caused by lower mantle density inhomogeneity. 對比分析低階大地水準面異常和地幔密度異常結(jié)果表明，地球形狀非對稱性主要是由下地幔的物質(zhì)密度不均勻引起的。These researches supply the fundamentals phycical constrains on establishing the mineralogical model of the Earth's lower mantle and the chemical composition of core-mantle boundary (CMB). 這一問題的研究將對限定下地幔的礦物學模型和核-幔邊界處的物質(zhì)成份,以及對下地幔和核一幔邊界處的地震波速結(jié)構(gòu)的解釋提供基礎物理依據(jù)。Suction mechanism for iron entrainment into the lower mantle 鐵卷吸到低地幔里的吸入機制 返回 lower mantle