Volatile and Organic Compositions of Sedimentary Rocks in Yellowknife Bay, Gale crater, Mars

• Published in: Science
• Main Authors: Ming, D. W., Archer, P. D., Glavin, D. P., Eigenbrode, J. L., Franz, H. B., Sutter, B., Brunner, A. E., Stern, J. C., Freissinet, C., McAdam, A. C., Mahaffy, P. R., Cabane, M., Coll, P., Campbell, J. L., Atreya, S. K., Niles, P. B., Bell, J. F., III, Bish, D. L., Brinckerhoff, W. B., Buch, A., Conrad, P. G., Des Marais, D. J., Ehlmann, B. L., Fairén, A. G., Farley, K., Flesch, G. J., Francois, P., Gellert, R., Grant, J. A., Grotzinger, J. P., Gupta, S., Herkenhoff, K. E., Hurowitz, J. A., Leshin, L. A., Lewis, K. W., McLennan, S. M., Miller, K. E., Moersch, J., Morris, R. V., Navarro-González, R., Pavlov, A. A., Perrett, G. M., Pradler, I., Squyres, S. W., Summons, R. E., Steele, A., Stolper, E. M., Sumner, D. Y., Szopa, C., Teinturier, S., Trainer, M. G., Treiman, A. H., Vaniman, D. T., Vasavada, A. R., Webster, C. R., Wray, J. J., Yingst, R. A.
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Association for the Advancement of Science 2014
• Subjects: Yellowknife; Yellowknife Bay
• Online Access: https://authors.library.caltech.edu/42647/; https://authors.library.caltech.edu/42647/1/Ming_et%20al_2013_Science_Sheepbed%20Volatiles_Accepted.pdf; https://resolver.caltech.edu/CaltechAUTHORS:20131122-100526751

H₂O, CO₂, SO₂, O₂, H₂, H₂S, HCl, chlorinated hydrocarbons, NO and other trace gases were evolved during pyrolysis of two mudstone samples acquired by the Curiosity rover at Yellowknife Bay within Gale crater, Mars. H₂O/OH-bearing phases included 2:1 phyllosilicate(s), bassanite, akaganeite, and amorphous materials. Thermal decomposition of carbonates and combustion of organic materials are candidate sources for the CO₂. Concurrent evolution of O₂ and chlorinated hydrocarbons suggest the presence of oxychlorine phase(s). Sulfides are likely sources for S-bearing species. Higher abundances of chlorinated hydrocarbons in the mudstone compared with Rocknest windblown materials previously analyzed by Curiosity suggest that indigenous martian or meteoritic organic C sources may be preserved in the mudstone; however, the C source for the chlorinated hydrocarbons is not definitively of martian origin.