DOI: 10.1016/j.epsl.2021.117008
论文题名: Origin of hydrogen isotopic variations in chondritic water and organics
作者: Piani L. ; Marrocchi Y. ; Vacher L.G. ; Yurimoto H. ; Bizzarro M.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 567 语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165631
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Piani L.,Marrocchi Y.,Vacher L.G.,et al. Origin of hydrogen isotopic variations in chondritic water and organics[J]. Earth and Planetary Science Letters,2021-01-01,567