AUTHOR=Sheppard Rachel Y. , Loizeau Damien , Fraeman Abigail A. , Rampe Elizabeth B. , Pilorget Cédric , Bibring Jean-Pierre TITLE=Mg-sulfate can spectrally obscure siderite: implications for martian surface carbonates JOURNAL=Frontiers in Astronomy and Space Sciences VOLUME=Volume 12 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2025.1549242 DOI=10.3389/fspas.2025.1549242 ISSN=2296-987X