| DOI: | 10.1016/j.epsl.2017.10.046
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| Scopus记录号: | 2-s2.0-85033567497
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| 论文题名: | Oxygen isotopic ratios of primordial water in carbonaceous chondrites |
| 作者: | Fujiya W.
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| 刊名: | Earth and Planetary Science Letters
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| ISSN: | 0012821X
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| 出版年: | 2018
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| 卷: | 481 | | 起始页码: | 264
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| 结束页码: | 272
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| 语种: | 英语
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| 英文关键词: | carbonaceous chondrites
; hydrogen abundances
; oxygen isotopes
; primordial water
; water/rock ratios
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| Scopus关键词: | Hydrogen bonds
; Isotopes
; Photochemical reactions
; Weathering
; Carbonaceous chondrites
; Condensation front
; Isotopic fractionations
; Low temperatures
; Oxygen isotopes
; Possible mechanisms
; Water destruction
; Water/rock ratio
; Meteorites
; carbonaceous chondrite
; chemical weathering
; hydrogen
; isotopic ratio
; low temperature
; oxygen isotope
; photochemistry
; water-rock interaction
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| 英文摘要: | In this work, I estimate the δ18O and δ17O values of primordial water in CM chondrites to be 55 ± 13 and 35 ± 9‰ respectively, based on whole-rock O and H data. Also, I found that the O and/or H data of Antarctic meteorites are biased, which is attributed to terrestrial weathering. This characteristic O isotopic ratio of water together with corresponding water abundances in CM chondrites are consistent with the origin of water as ice processed by photochemical reactions at the outer regions of the solar nebula, where mass-independent O isotopic fractionation and water destruction may have occurred. Another possible mechanism to produce the inferred O isotopic ratio of water would be O isotopic fractionation between water vapor and ice, which likely occurred near the condensation front of H2O (snow line) in the solar nebula. The inferred O isotopic ratio of water suggests that carbonate in CM chondrites formed at low temperatures of <150 °C. The O isotopic ratios of primordial water in chondrites other than CM chondrites are not well constrained. © 2017 Elsevier B.V. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/110192
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| Appears in Collections: | 影响、适应和脆弱性
气候变化事实与影响
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作者单位: | Faculty of Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
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| Recommended Citation: | |
Fujiya W.. Oxygen isotopic ratios of primordial water in carbonaceous chondrites[J]. Earth and Planetary Science Letters,2018-01-01,481
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