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Mercury: Determining Minerals And Their Abundances With Mid-IR Spectral Deconvolution III

Sprague, A. L. and Donaldson, H. K. and Kozlowski, R. W. and Helbert, J. and Maturilli, A. and Grosse, F. A. and Boop, T. S. and Boccafola, K. (2007) Mercury: Determining Minerals And Their Abundances With Mid-IR Spectral Deconvolution III. In: American Astronomical Society, 39th DPS meeting, 03.09. Division for Planetary Sciences, 39th meeting, 2007-10-07 - 2007-10-12, Orlando, Florida, USA.

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Abstract

We identify mineral types and approximate abundances on Mercury's surface from 196° to 270°W longitude from five slit observations at regions in north-mid and north latitudes. The subtending slit sectors have central coordinates as follows: (1) 11 April 2006#89; 203°W, 13°N 205°W, 47°N (2) 7 April 2006#77; 210°W, 8°N 230°W, 25°N (3) 11 April 2006#96; 212°W, 15°N 219°W, 45°N (4) 11 April 2006#93; 225°W, 13°N 237°W, 45°N (5) 11 April 2006#109; 262°W, 8°N, 267°W, 25°N. Our results are obtained by modeling spectra obtained with the Mid-Infrared Spectrometer and Imager (MIRSI) at the Infrared Telescope Facility (IRTF) using an established spectral deconvolution algorithm (Ramsey 1996, Ph.D. Dissertation, ASU; Ramsey and Christiansen 1998, JGR). We have assembled several mineral libraries (JHU, Salisbury et al. 1991; JPL, http://speclib.jpl.nasa.gov; RELAB, http://www.planetary brown.edu/relab; ASU, http://speclib.asu.edu; BED, Maturilli et al. 2007, LPSC XXXVIII Abs.) consisting of a wide range of known mineral compositions with grain sizes ranging from the finest separates, 0 - 45 µm, incrementally increasing to 250 - 400 µm. Surface mineral deconvolutions are suggestive of albite, enstatite, clinopyroxene, labradorite, and sodalite, mineral phases that have been previously observed in the mid-infrared at Mercury (Sprague et al. 1994, 1998, Icarus). The deconvolution also identified pigeonite at more than one location. The same techniques and computer program have correctly fit the known compositions of the HED samples, and given a plausible fit to spectra from the Moon (both also presented at this meeting). This work was funded by NSF AST0406796.

Document Type:Conference or Workshop Item (Speech)
Title:Mercury: Determining Minerals And Their Abundances With Mid-IR Spectral Deconvolution III
Authors:
AuthorsInstitution or Email of Authors
Sprague, A. L.Univ. of Arizona, USA
Donaldson, H. K.Univ. of Arizona, USA
Kozlowski, R. W.Susquehanna University
Helbert, J.UNSPECIFIED
Maturilli, A.UNSPECIFIED
Grosse, F. A.Susquehanna University
Boop, T. S.Susquehanna University
Boccafola, K.Susquehanna University
Date:October 2007
Journal or Publication Title:American Astronomical Society, 39th DPS meeting
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:03.09
Status:Published
Keywords:MIRSI, Mercury, Minerals
Event Title:Division for Planetary Sciences, 39th meeting
Event Location:Orlando, Florida, USA
Event Type:international Conference
Event Dates:2007-10-07 - 2007-10-12
Organizer:American Astronomical Union
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Vergleichende Planetologie (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Deposited By: Stefanie Hempel
Deposited On:15 Jan 2008
Last Modified:27 Apr 2009 14:36

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