DOI: 10.1038/ngeo2339
论文题名: Reactive ammonia in the solar protoplanetary disk and the origin of Earth's nitrogen
作者: Harries D. ; Hoppe P. ; Langenhorst F.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期: 2 起始页码: 97
结束页码: 101
语种: 英语
Scopus关键词: accretion
; amino acid
; ammonia
; comet
; Earth science
; isotopic composition
; meteor
; mineral
; nitrogen
; terrestrial ecosystem
英文摘要: Terrestrial nitrogen isotopic compositions are distinct from solar and cometary values and similar to those of primitive meteorites, suggesting that Earth's atmospheric nitrogen originates from a primordial cosmochemical source. Prebiotic organic compounds containing nitrogen that formed in the solar protoplanetary disk, such as amino acids, may have contributed to the emergence of life on Earth. However, the original reservoirs of these volatile compounds and the processes involved in their distribution and chemical modification before accretion remain unclear. Here we report the occurrence of the mineral carlsbergite (chromium nitride) within nanocrystalline sulphide inclusions of primitive chondritic meteorites using transmission electron microscopy and secondary ion mass spectrometry. The characteristics and occurrence of carlsbergite are consistent with precipitation from a chromium-bearing metal in the presence of reactive ammonia. The carlsbergite crystals have nitrogen isotopic compositions that differ from ammonia in cometary ices, but are similar to Earth's atmospheric nitrogen. We suggest that the reactive ammonia proposed to have initiated formation of the carlsbergite came from ices within regions of the protoplanetary disk that were affected by the distal wakes of shock waves. Our findings imply that these primordial ammonia-bearing ices were a nitrogen reservoir within the formation region of the chondritic meteorite parent bodies and could have been a source of volatiles for the early Earth. © 2015 Macmillan Publishers Limited. All rights reserved Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106364
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Institut für Geowissenschaften, Friedrich-Schiller-Universität Jena, Carl-Zeiss-Promenade 10, Jena, Germany; Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstraße 30, Bayreuth, Germany; Max-Planck-Institut für Chemie, Hahn-Meitner-Weg 1, Mainz, Germany
Recommended Citation:
Harries D.,Hoppe P.,Langenhorst F.. Reactive ammonia in the solar protoplanetary disk and the origin of Earth's nitrogen[J]. Nature Geoscience,2015-01-01,8(2)