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DOI	10.1016/j.epsl.2021.117008
	Origin of hydrogen isotopic variations in chondritic water and organics
	Piani L.; Marrocchi Y.; Vacher L.G.; Yurimoto H.; Bizzarro M.
发表日期	2021
ISSN	0012821X
卷号	567
英文摘要	Chondrites are rocky fragments of asteroids that formed at different times and heliocentric distances in the early solar system. Most chondrite groups contain water-bearing minerals, attesting that both water-ice and dust were accreted on their parent asteroids. Nonetheless, the hydrogen isotopic composition (D/H) of water in the different chondrite groups remains poorly constrained, due to the intimate mixture of hydrated minerals and organic compounds, the other main H-bearing phase in chondrites. Building on our recent works using in situ secondary ion mass spectrometry analyses, we determined the H isotopic composition of water in a large set of chondritic samples (CI, CM, CO, CR, and C-ungrouped carbonaceous chondrites) and report that water in each group shows a distinct and unique D/H signature. Based on a comparison with literature data on bulk chondrites and their water and organics, our data do not support a preponderant role of parent-body processes in controlling the D/H variations among chondrites. Instead, we propose that the water and organic D/H signatures were mostly shaped by interactions between the protoplanetary disk and the molecular cloud that episodically fed the disk over several million years. Because the preservation of D-rich interstellar water and/or organics in chondritic materials is only possible below their respective sublimation temperatures (160 and 350–450 K), the H isotopic signatures of chondritic materials depend on both the timing and location at which their parent body formed. © 2021 Elsevier B.V.
关键词	chondrite disk hydrogen isotopes molecular cloud organic matter water
英文关键词	Hydrogen bonds; Isotopes; Meteorites; Organic compounds; Secondary ion mass spectrometry; Water; Disk; Heliocentric distances; Hydrogen isotope; Hydrogen isotopic; Isotopic variations; Molecular clouds; Organic matter; Organics; Parent bodies; Time-distance; Hydrogen
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/203253
作者单位	Université de Lorraine, CNRS, CRPG, UMR 7358, Vandoeuvre les Nancy, France; Laboratory for Space Sciences, the Department of Physics, Washington University in St. Louis, St. Louis, MO 63130, United States; Department of Natural History Sciences, Faculty of Science, Hokkaido University, Sapporo, Japan; StarPlan - Centre for Star and Planet Formation, GLOBE Institute, University of Copenhagen, Øster Voldgade 5-7, Copenhagen, DK-1350, Denmark
推荐引用方式 GB/T 7714	Piani L.,Marrocchi Y.,Vacher L.G.,et al. Origin of hydrogen isotopic variations in chondritic water and organics[J],2021,567.
APA	Piani L.,Marrocchi Y.,Vacher L.G.,Yurimoto H.,&Bizzarro M..(2021).Origin of hydrogen isotopic variations in chondritic water and organics.Earth and Planetary Science Letters,567.
MLA	Piani L.,et al."Origin of hydrogen isotopic variations in chondritic water and organics".Earth and Planetary Science Letters 567(2021).