Insights into magma ocean dynamics from the transport properties of basaltic melt.
Insights into magma ocean dynamics from the transport properties of basaltic melt.
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DOI：
10.1038/s41467-022-35171-y
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发表时间：
2022-12-08
影响因子：
16.6
通讯作者：
Karki, Bijaya B.
中科院分区：
文献类型：
--
作者：
Bajgain, Suraj K.;Ashley, Aaron Wolfgang;Mookherjee, Mainak;Ghosh, Dipta B.;Karki, Bijaya B.
岩浆的粘度在地球的动力学中起着至关重要的作用：从最初阶段岩浆海洋的结晶到今天的火山过程。然而，高压下粘度的压力依赖行为仍然存在争议。在这项研究中，我们报道了玄武岩熔体的第一性原理分子动力学模拟结果，结果表明，在~6 GPa时，熔体粘度在整个下地幔各等温线上出现最小值后，随着压力的增加而增加。然而，岩浆海洋温度的升高转化为粘度的狭窄范围，即0.01-0.03 Pa.s。这种低粘度意味着岩浆海洋的结晶可能在几百万年内完成。这些结果还表明，岩浆海洋的结晶可能是分段的，从而支持了现代地幔不均质性可能是在原始地幔的早期结晶过程中产生的假设。岩浆的粘度在地球的动力学中起着至关重要的作用。在这项研究中，作者们展示了玄武岩熔体的输运性质如何使我们能够深入了解岩浆海洋动力学。
The viscosity of magma plays a crucial role in the dynamics of the Earth: from the crystallization of a magma ocean during its initial stages to modern-day volcanic processes. However, the pressure-dependence behavior of viscosity at high pressure remains controversial. In this study, we report the results of first-principles molecular dynamics simulations of basaltic melt to show that the melt viscosity increases upon compression along each isotherm for the entire lower mantle after showing minima at ~6 GPa. However, elevated temperatures of the magma ocean translate to a narrow range of viscosity, i.e., 0.01–0.03 Pa.s. This low viscosity implies that the crystallization of the magma ocean could be complete within a few million years. These results also suggest that the crystallization of the magma ocean is likely to be fractional, thus supporting the hypothesis that present-day mantle heterogeneities could have been generated during the early crystallization of the primitive mantle. The viscosity of magma plays a crucial role in the dynamics of planet Earth. In this study, the authors show how transport properties of basaltic melt can give us insights into magma ocean dynamics.
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影响因子：
16.6
作者：
Bajgain S;Ghosh DB;Karki BB
通讯作者：
Karki BB
影响因子：
5.3
作者：
Elkins-Tanton, L. T.
通讯作者：
Elkins-Tanton, L. T.
影响因子：
4.4
作者：
FLYVBJERG, H;PETERSEN, HG
通讯作者：
PETERSEN, HG
DOI：
10.1016/b978-0-12-811301-1.00001-0
发表时间：
2018-01-01
期刊：
MAGMAS UNDER PRESSURE: ADVANCES IN HIGH-PRESSURE EXPERIMENTS ON STRUCTURE AND PROPERTIES OF MELTS
影响因子：
--
作者：
Foley, Stephen F.;Pinter, Zsanett
通讯作者：
Pinter, Zsanett
影响因子：
64.8
作者：
French, Scott W.;Romanowicz, Barbara
通讯作者：
Romanowicz, Barbara