@article{5849d2605cb54fb5a4c92f020e2dd791,
title = "Experimental Constraints on Ferropericlase (Mg, Fe)O Melt Viscosity Up to 70 GPa",
abstract = "During Earth's accretion, Earth's mantle is expected to have been a magma ocean due to large impacts. As such, properties of molten mantle materials are key to understanding Earth's thermochemical evolution. However, due to experimental challenges, transport properties at lower mantle pressures, particularly viscosity, are poorly constrained for mantle melts. In this study, we use quenched dendritic textures to estimate melt viscosities at high pressures for (Mg, Fe)O ferropericlase, one of the major components of the mantle. We find that the viscosity of (Mg, Fe)O melt near liquidus temperatures is ~10−3–10−2 Pa s over the pressure range of 3–70 GPa, which is ~1–2 orders of magnitude lower than previous results for Si-rich melts at similar conditions. This may have implications for magma ocean cooling and thermochemical evolution of the mantle.",
keywords = "dendrites, diamond anvil cell, diffusion, high pressure, magma ocean, melt viscosity",
author = "Zhixue Du and Jie Deng and Lee, {Kanani K.M.}",
note = "Funding Information: Data supporting Figures 2 and 3 are available in Tables 2 and 3 and sup porting information. We thank L. Miyagi, D. Bercovici, J. Korenaga, S. Karato, R. Cohen, J. Wettlaufer, and S. Peppin for constructive discussions; M. Rooks and F. Camino for FIB help at YINQE Yale University and CFN at Brookhaven National Lab, respectively; Z. Jiang for SEM assistance; J. Eckert for EPMA measurements; and J. Girard, G. Amulele, W. Samela, and C. Fiederlein for technical support. We thank T. Pier of SPI Lasers and the support staff of National Instruments for assistance on LabVIEW programming. We also appreciate constructive comments from three anonymous reviewers. Facilities use was supported by YINQE and NSF MRSEC DMR 1119826. Research was carried out in part at the Center for Functional Nanomaterials, Brookhaven National Laboratory, which is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under contract DE-AC02-98CH10886. This work was funded in part by NSF (EAR-1551438, EAR-1321956, and EAR-0955824) and CDAC. Publisher Copyright: {\textcopyright}2017. American Geophysical Union. All Rights Reserved.",
year = "2017",
month = dec,
day = "28",
doi = "10.1002/2017GL076177",
language = "English (US)",
volume = "44",
pages = "12,190--12,196",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "24",
}