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Update on the Chemical Composition Of Crystalline, Smectite, and Amorphous Components for Rocknest Soil and John Klein and Cumberland Mudstone Drill Fines at Gale Crater, MarsWe have previously calculated the chemical compositions of the X-ray-diffraction (XRD) amorphous component of three solid samples (Rocknest (RN) soil, John Klein (JK) drill fines, and Cumberland (CB) drill fines) using major-element chemistry (APXS), volatile-element chemistry (SAM), and crystalline- phase mineralogy (CheMin) obtained by the Curiosity rover as a part of the ongoing Mars Science Laboratory mission in Gale Crater. According to CheMin analysis, the RN and the JK and CB samples are mineralogically distinct in that RN has no detectable clay minerals and both JK and CB have significant concentrations of high-Fe saponite. The chemical composition of the XRD amorphous component is the composition remaining after mathematical removal of the compositions of crystalline components, including phyllosilicates if present. Subsequent to, we have improved the unit cell parameters for Fe-forsterite, augite, and pigeonite, resulting in revised chemical compositions for the XRD-derived crystalline component (excluding clay minerals). We update here the calculated compositions of amorphous components using these revised mineral compositions.
Document ID
20150001942
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Morris, R. V. (NASA Johnson Space Center Houston, TX, United States)
Ming, D. W. (NASA Johnson Space Center Houston, TX, United States)
Gellert, R. (Guelph Univ. Ontario, Canada)
Vaniman, D. T. (Planetary Science Inst. Tucson, AZ, United States)
Bish, D. L. (Indiana Univ. Bloomington, IN, United States)
Blake, D. F. (NASA Ames Research Center Moffett Field, CA, United States)
Chipera, S. J. (Chesapeake Energy Corp. Oklahoma City, OK, United States)
Morrison, S. M. (Arizona Univ. Tucson, AZ, United States)
Downs, R. T. (Arizona Univ. Tucson, AZ, United States)
Rampe, E. B. (NASA Johnson Space Center Houston, TX, United States)
Treiman, A. H. (Lunar and Planetary Inst. Houston, TX, United States)
Yen, A. S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Achilles, C. N. (Indiana Univ. Bloomington, IN, United States)
Archer, P. D. (NASA Johnson Space Center Houston, TX, United States)
Bristow, T. F. (NASA Ames Research Center Moffett Field, CA, United States)
Cavanaugh, P. (Indiana Univ. Bloomington, IN, United States)
Fenrdrich, K. (Arizona Univ. Tucson, AZ, United States)
Crisp, J. A. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Des Marais, D. J. (NASA Ames Research Center Moffett Field, CA, United States)
Farmer, J. D. (Arizona State Univ. Tempe, AZ, United States)
Grotzinger, J. P. (California Inst. of Tech. Pasadena, CA, United States)
Mahaffy, P. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
McAdam, A. C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Morookian, J. M. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
February 23, 2015
Publication Date
March 16, 2015
Subject Category
Lunar And Planetary Science And Exploration
Chemistry And Materials (General)
Report/Patent Number
JSC-CN-32822
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: The Woodlands, TX
Country: United States
Start Date: March 16, 2015
End Date: March 20, 2015
Sponsors: Lunar and Planetary Inst.
Distribution Limits
Public
Copyright
Public Use Permitted.

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