气候变化领域集成服务门户(CCPortal): Incompatibility of argon during magma ocean crystallization

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DOI	10.1016/j.epsl.2020.116598
	Incompatibility of argon during magma ocean crystallization
	Jackson C.R.M.; Williams C.D.; Du Z.; Bennett N.R.; Mukhopadhyay S.; Fei Y.
发表日期	2021
ISSN	0012821X
卷号	553
英文摘要	We report results from multi-anvil (MA) and laser-heated diamond anvil cell (LH-DAC) experiments that synthesize high-pressure phases, including bridgmanite, ferropericlase, stishovite, and ultramafic liquid, in the presence of an argon-rich fluid. The goal of the experiments is to constrain the equilibrium distribution of argon in magma ocean environments. Argon concentrations in LH-DAC experiments were quantified by electron microprobe analysis, while argon concentrations in MA experiments were quantified by laser-ablation mass spectrometry and electron microprobe analysis. Our LH-DAC experiments demonstrate that argon solubility in ultramafic liquid is near or above 1.5 wt.% at conditions between 13–101 GPa and 2300–6300 K. Argon concentrations in bridgmanite and ferropericlase synthesized in LH-DAC experiments range from below detection to 0.58 wt.%. Argon concentrations in bridgmanite and ferropericlase synthesized in MA experiments range from below detection to 2.16 wt.% for electron microprobe measurements and laser-ablation measurements. We interpret this wide range of argon concentrations in minerals to reflect the variable presence of argon-rich fluid inclusions in analytical volumes. Our analyses therefore provide upper limit constraints for argon solubility in high-pressure minerals (<0.015 wt.%) across all mantle pressures and temperatures. The combination of relatively high argon solubility in ultramafic liquid (∼1.5 wt.%) and low argon solubility in minerals implies argon incompatibility (Dbridgmanite−meltAr < 0.01, Dferropericlase−meltAr < 0.01) during magma ocean crystallization and that the initial distribution of argon, and likely other neutral species, may be controlled by liquids trapped in a crystallizing magma ocean. We thus predict a basal magma ocean would be enriched in noble gases relative to other regions of the mantle. Moreover, we predict that the noble gas parent-daughter ratio of magma ocean cumulates pile will increase with crystallization, assuming refractory and incompatible behavior for parent elements. © 2020 Elsevier B.V.
关键词	argon magma ocean partitioning solubility
英文关键词	Ablation; Electron probe microanalysis; Experimental mineralogy; High pressure effects in solids; Inert gases; Laser ablation; Liquids; Mass spectrometry; Minerals; Oceanography; Piles; Silica; Solubility; Argon concentration; Crystallizing magma; Electron microprobes; Equilibrium distributions; Fluid inclusion; High-pressure phasis; Laser-heated diamond anvil cells; Neutral species; Argon lasers; argon; concentration (composition); crystallization; electron probe analysis; experimental study; igneous geochemistry; magma chamber; mass spectrometry; oceanic lithosphere
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203147
作者单位	Department of Earth and Environmental Sciences, Tulane University, United States; Earth and Planetary Sciences Department, University of California, Davis, United States; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; Department of Chemistry and Biochemisry, California State University, East Bay, United States; Earth and Planets Laboratory, Carnegie Institution for Science, United States
推荐引用方式 GB/T 7714	Jackson C.R.M.,Williams C.D.,Du Z.,et al. Incompatibility of argon during magma ocean crystallization[J],2021,553.
APA	Jackson C.R.M.,Williams C.D.,Du Z.,Bennett N.R.,Mukhopadhyay S.,&Fei Y..(2021).Incompatibility of argon during magma ocean crystallization.Earth and Planetary Science Letters,553.
MLA	Jackson C.R.M.,et al."Incompatibility of argon during magma ocean crystallization".Earth and Planetary Science Letters 553(2021).