¹K. H. Joy,²N. Wang,¹J. F. Snape,¹A. Goodwin,¹J. F. Pernet-Fisher,³M. J. Whitehouse,²Y. Liu,²Y. T. Lin,⁴J. R. Darling,⁵P. Tar,¹R. Tartèse
Nature Astronomy (in Press) Open Access Link to Article [DOI https://doi.org/10.1038/s41550-024-02380-y]
¹Department of Earth and Environmental Sciences, The University of Manchester, Manchester, UK
²Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China
³Department of Geosciences, Swedish Museum of Natural History, Stockholm, Sweden
⁴School of the Environment, Geography and Geosciences, University of Portsmouth, Portsmouth, UK
⁵Previously at the School of Health Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK

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

^1,2Sen Hu, ^2,3Mahesh Anand, ²Ian A. Franchi, ²Xuchao Zhao, ^2,4Alice Stephant, ⁵Magali Bonifacie, ^1,6Huicun He, ¹Wei Yang, ¹Jialong Hao, ¹Yangting Lin
Earth and Planetary Science Letters 648, 119072 Open Access Link to Article [https://doi.org/10.1016/j.epsl.2024.119072]
¹Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
²School of Physics Sciences, The Open University, Milton Keynes MK7 6AA, UK
³Department of Earth Sciences, The Natural History Museum, London, SW7 5BD, UK
⁴Istituto di Astrofisica e Planetologia Spaziali -INAF, Roma, Italy
⁵Institut de Physique du Globe de Paris, Université de Paris, CNRS, 75005 Paris, France
⁶College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Copyright Elsevier

The chassignites and nakhlites could have co-magmatic origin but display distinct hydrogen and chlorine isotopic compositions, indicating that they may have experienced distinct hydrothermal activities on Mars. However, the details are not yet fully understood. Here, we performed H and Cl isotopic investigations on hydrous minerals (kaersutite and apatite) and glass-bearing melt inclusions from chassignite NWA 2737 to unravel the details of the hydrothermal events experienced by chassignites on Mars. Our results demonstrate that at least two hydrothermal events on Mars have been recorded in NWA 2737. A D- and 37Cl-rich martian crustal/underground fluid was added to the parent magma of NWA 2737 prior to the entrapment of melt inclusions and later interaction of the parent rock with a D-poor fluid, probably deriving from magma degassing. The notable high-δD values (up to 6239‰) of kaersutite in NWA 2737 are comparable with those recorded in younger shergottites, suggesting that the martian exchangeable water reservoir has retained a nearly constant δD value over the past 1.3