¹Lara R. McMonigal, ^1,2Jon M. Friedrich
Geological Society Special Publication (in Press)
Link to Article [DOI: 10.1144/gslsp.ecpub2024-115]
¹Department of Chemistry and Biochemistry, Fordham University, 441 East Fordham Road, Bronx, 10458-9993, NY, United States
²Department of Earth and Planetary Sciences, American Museum of Natural History, 200 Central Park West, New York, 10024-5102, NY, United States

We currently do not have a copyright agreement with this publisher and cannot display the abstract here

¹R. E. Merle, ²C. Deligny, ²M. J. Whitehouse, ²G. G. Kenny, ³K. K. Larsen
Communications Earth & Environment (in Press)
Open Access Link to Article [DOI: 10.1038/s43247-025-03002-9]
¹Department of Earth Sciences, Uppsala University, Villavägen 16, Uppsala, 75236, Sweden
²Swedish Museum of Natural History, Stockholm, SE-104 05, Sweden
³Centre for Star and Planet Formation, Globe institute, University of Copenhagen, Øster Voldgade 5-7, Copenhagen, Denmark

We currently do not have a copyright agreement with this publisher and cannot display the abstract here

^1,2Futing Yin, ^1,2,3Hong Tang, ^1,2Tian Zhang, ⁴Tingfeng Cheng, ^1,2,3Xiongyao Li, ¹Hong Jin, ¹Yuanyun Wen, ⁵Xiangliang Pan, ^1,2,3Jianzhong Liu
Journal of Geophysical Research: Planets, 131, e2026JE009805 Link to Article [DOI: 10.1029/2026JE009805]

¹Center for Lunar and Planetary Sciences, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China
²College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
³CAS Center for Excellence in Comparative Planetology, Hefei, China
⁴College of Environment, Zhejiang University of Technology, Hangzhou, China
⁵Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, Hangzhou, China
Published by arrangement with John Wiley & Sons

Organic matter (OM) in C‐type asteroids provides important insights into the early evolution ofthe solar system and the origin of life on Earth. However, the responses of different types of OM to spaceweathering remain unclear. Here, we performed a He+ irradiation experiment on the Murchison meteorite tosimulate the solar wind irradiation process; the experiment was conducted at a fluence of 1.2 × 1017 ions/cm2,simulating the solar wind exposure of a C‐type asteroid over an 800‐year timescale. Raman and nanoscaleinfrared spectroscopy were used to analyze the changes in OM after He+ irradiation. The nano‐IR spectrarevealed the presence of six organic functional groups (carboxylic acids, aliphatic and aromatic hydrocarbons,amides, amino acids, and aldehydes) within the macromolecular and soluble OM of the Murchison matrix.Irradiation led to an increase in the disorder of OM and reduction in the total OM content via the disruption of Cbonds in macromolecular organic compounds and sputtering of their constituent atoms and molecules. Aliphatichydrocarbons were modified to the greatest degree while aromatic hydrocarbons were more resistant to He+irradiation. These findings enhance our understanding of the formation and evolution of extraterrestrial OMduring the process of solar wind irradiation.