In-situ preservation of nitrogen-bearing organics in Noachian Martian carbonates

M Koike, R Nakada, I Kajitani, T Usui… - Nature …, 2020 - nature.com
Understanding the origin of organic material on Mars is a major issue in modern planetary
science. Recent robotic exploration of Martian sedimentary rocks and laboratory analyses of …

Nitrogen Incorporation in Potassic and Micro-and Meso-Porous Minerals: Potential Biogeochemical Records and Targets for Mars Sampling

MP Nikitczuk, GE Bebout, CA Geiger, T Ota… - Astrobiology, 2022 - liebertpub.com
We measured the N concentrations and isotopic compositions of 44 samples of terrestrial
potassic and micro-and meso-porous minerals and a small number of whole-rocks to …

[HTML][HTML] EXAFS determination of clay minerals in Martian meteorite Allan Hills 84001 and its implication for the Noachian aqueous environment

R Nakada, G Tanabe, I Kajitani, T Usui, M Shidare… - Minerals, 2021 - mdpi.com
The aqueous environment of ancient Mars is of significant interest because of evidence
suggesting the presence of a large body of liquid water on the surface at~ 4 Ga, which differs …