@article{b5bb6fe64ced4519815a83260ac649af,
title = "Nearly Carbon-Saturated Magma Oceans in Planetary Embryos During Core Formation",
abstract = "A planetary mantle after core formation has been thought to be highly depleted in carbon due to its strong siderophile behavior. However, the carbon contents in lunar and terrestrial mantles are much greater than experimental predictions; thus, how the carbon contents in terrestrial mantles were established is puzzling and poorly understood. Here, we present high-pressure experiments on the metal-silicate partitioning of carbon at 2 GPa and 1923 K in a system containing 0.2 wt% C, which is close to that in enstatite chondrites, and show that a magma ocean made of chondritic materials is nearly saturated with carbon even under metal saturation. The consistency between the solubility of carbon in silicate melts and the carbon contents in lunar and terrestrial mantles also supports a nearly carbon-saturated magma ocean during core formation and suggests that carbon contents in terrestrial mantles may have been established during the main accretion phase.",
keywords = "Earth, Moon, carbon, core-mantle partitioning",
author = "Hideharu Kuwahara and Shoichi Itoh and Akimasa Suzumura and Ryoichi Nakada and Tetsuo Irifune",
note = "Funding Information: The authors would like to thank two anonymous reviewers for their constructive comments and Andrew J. Dombard for editorial handling this manuscript. This research was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI to H. Kuwahara (Grant Number 18J00966, 18K13635, and 20H01994). The authors are greatly acknowledged Kenji Shimizu at Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, and Kraus P. Jochum at Max-Plank Institute for Chemistry for providing the natural glass standards for EPMA and SIMS analyses. Funding Information: The authors would like to thank two anonymous reviewers for their constructive comments and Andrew J. Dombard for editorial handling this manuscript. This research was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI to H. Kuwahara (Grant Number 18J00966, 18K13635, and 20H01994). The authors are greatly acknowledged Kenji Shimizu at Kochi Institute for Core Sample Research, Japan Agency for Marine‐Earth Science and Technology, and Kraus P. Jochum at Max‐Plank Institute for Chemistry for providing the natural glass standards for EPMA and SIMS analyses. Publisher Copyright: {\textcopyright} 2021. American Geophysical Union. All Rights Reserved.",
year = "2021",
month = may,
doi = "10.1029/2021GL092389",
language = "English",
volume = "48",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "10",
}