Skip to Main content Skip to Navigation
Journal articles

Nitrogen Isotopic Composition and Density of the Archean Atmosphere

Abstract : Understanding the atmosphere's composition during the Archean eon is a fundamental issue to unravel ancient environmental conditions. We show from the analysis of nitrogen and argon isotopes in fluid inclusions trapped in 3.0-3.5 Ga hydrothermal quartz that the PN2 of the Archean atmosphere was lower than 1.1 bar, possibly as low as 0.5 bar, and had a nitrogen isotopic composition comparable to the present-day one. These results imply that dinitrogen did not play a significant role in the thermal budget of the ancient Earth and that the Archean PCO2 was probably lower than 0.7 bar.
Document type :
Journal articles
Complete list of metadatas

Cited literature [18 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01346331
Contributor : Bernard Marty <>
Submitted on : Friday, July 22, 2016 - 11:00:04 AM
Last modification on : Thursday, February 25, 2021 - 9:46:09 AM

File

1240971-R5-2.pdf
Files produced by the author(s)

Identifiers

Citation

Bernard Marty, Laurent Zimmermann, Magali Pujol, Ray Burgess, Pascal Philippot. Nitrogen Isotopic Composition and Density of the Archean Atmosphere. Science, American Association for the Advancement of Science, 2013, ⟨10.1126/science.1240971⟩. ⟨hal-01346331⟩

Share

Metrics

Record views

455

Files downloads

881