1 REVISION 1 2 Title: Heavy halogen geochemistry of martian shergottite meteorites and 3 implications for the halogen composition of the depleted shergottite mantle 4 source 5 6 Authors: Patricia L. Clay1*, Katherine H. Joy1, Brian O’Driscoll1, Henner 7 Busemann2, Lorraine Ruziè-Hamilton1, Ray Burgess1, Jonathan Fellowes1, 8 Bastian Joachim-Mrosko3, John Pernet-Fisher1, Stanislav Strekopytov4** and 9 Christopher J. Ballentine5 10 *corresponding author: (
[email protected]) 11 12 Affiliations: 1Department of Earth and Environmental Sciences, University of 13 Manchester, Manchester, M13 9PL United Kingdom; 2Institute for Geochemistry 14 and Petrology, ETH Zürich, Clausiusstrasse 25, 8092 Zürich, Switzerland; 15 3Institute for Mineralogy and Petrography, University of Innsbruck, Innrain 52f, A- 16 6020 Innsbruck, Austria; 4Imaging and Analysis Centre, Natural History Museum, 17 Cromwell Road, London, SW7 5BD United Kingdom; 5Department of Earth 18 Sciences, University of Oxford, South Parks Road, Oxford, OX1 3AN United 19 Kingdom 20 **Current address: Inorganic Analysis, LGC Ltd, Queens Road, Teddington 21 TW11 0LY United Kingdom 22 23 Manuscript Information: Prepared for submission to American Mineralogist, 24 “Halogens in Planetary Systems” Special Collection. Abstract: 366 words; Main 25 text: 9828 words; References: 108; Figures: 9, Tables: 3; Supplementary 26 Figures: 5; Supplementary Tables: 4 27 28 Abstract 29 Volatile elements (e.g., H, C, N) have a strong influence on the physical 30 and chemical evolution of planets and are essential for the development of 31 habitable conditions. Measurement of the volatile and incompatible heavy 32 halogens, Cl, Br and I, can provide insight into volatile distribution and transport 33 processes, due to their hydrophilic nature.