TY - JOUR
T1 - Spectral parameters for Dawn FC color data
T2 - Carbonaceous chondrites and aqueous alteration products as potential cerean analog materials
AU - Schäfer, Tanja
AU - Nathues, Andreas
AU - Mengel, Kurt
AU - Izawa, Matthew R.M.
AU - Cloutis, Edward A.
AU - Schäfer, Michael
AU - Hoffmann, Martin
N1 - Funding Information:
The first author would like to thank the International Max Planck Research School (IMPRS) at MPS for funding. Furthermore, she also would like to thank Dr. Nafiseh Masoumzadeh for helpful discussions on light scattering theory. Concerning the large amount of spectral data we included in this study we are thankful to all the authors (see online supplementary material 2 ) who contributed their spectra to RELAB facility and the USGS Spectroscopy Laboratory and those people who keep running these facilities and enable access to the data. EAC thanks the Canada Foundation for Innovation, the Manitoba Research Innovations Fund, the Canadian Space Agency, the Natural Sciences and Engineering Research Council of Canada, and the University of Winnipeg for their support in setting up and maintaining HOSERLab. We like to thank the reviewers for thoroughly reading the manuscript and providing helpful comments.
Publisher Copyright:
© 2015 Elsevier Inc.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - We identified a set of spectral parameters based on Dawn Framing Camera (FC) bandpasses, covering the wavelength range 0.4-1.0. μm, for mineralogical mapping of potential chondritic material and aqueous alteration products on dwarf planet Ceres. Our parameters are inferred from laboratory spectra of well-described and clearly classified carbonaceous chondrites representative for a dark component. We additionally investigated the FC signatures of candidate bright materials including carbonates, sulfates and hydroxide (brucite), which can possibly be exposed on the cerean surface by impact craters or plume activity. Several materials mineralogically related to carbonaceous chondrites, including pure ferromagnesian phyllosilicates, and serpentinites were also investigated. We tested the potential of the derived FC parameters for distinguishing between different carbonaceous chondritic materials, and between other plausible cerean surface materials. We found that the major carbonaceous chondrite groups (CM, CO, CV, CK, and CR) are distinguishable using the FC filter ratios 0.56/0.44. μm and 0.83/0.97. μm. The absorption bands of Fe-bearing phyllosilicates at 0.7 and 0.9. μm in terrestrial samples and CM carbonaceous chondrites can be detected by a combination of FC band parameters using the filters at 0.65, 0.75, 0.83, 0.92 and 0.97. μm. This set of parameters serves as a basis to identify and distinguish different lithologies on the cerean surface by FC multispectral data.
AB - We identified a set of spectral parameters based on Dawn Framing Camera (FC) bandpasses, covering the wavelength range 0.4-1.0. μm, for mineralogical mapping of potential chondritic material and aqueous alteration products on dwarf planet Ceres. Our parameters are inferred from laboratory spectra of well-described and clearly classified carbonaceous chondrites representative for a dark component. We additionally investigated the FC signatures of candidate bright materials including carbonates, sulfates and hydroxide (brucite), which can possibly be exposed on the cerean surface by impact craters or plume activity. Several materials mineralogically related to carbonaceous chondrites, including pure ferromagnesian phyllosilicates, and serpentinites were also investigated. We tested the potential of the derived FC parameters for distinguishing between different carbonaceous chondritic materials, and between other plausible cerean surface materials. We found that the major carbonaceous chondrite groups (CM, CO, CV, CK, and CR) are distinguishable using the FC filter ratios 0.56/0.44. μm and 0.83/0.97. μm. The absorption bands of Fe-bearing phyllosilicates at 0.7 and 0.9. μm in terrestrial samples and CM carbonaceous chondrites can be detected by a combination of FC band parameters using the filters at 0.65, 0.75, 0.83, 0.92 and 0.97. μm. This set of parameters serves as a basis to identify and distinguish different lithologies on the cerean surface by FC multispectral data.
KW - Asteroid Ceres
KW - Meteorites
KW - Mineralogy
KW - Spectroscopy
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UR - http://www.scopus.com/inward/citedby.url?scp=84946429724&partnerID=8YFLogxK
U2 - 10.1016/j.icarus.2015.10.005
DO - 10.1016/j.icarus.2015.10.005
M3 - Article
AN - SCOPUS:84946429724
SN - 0019-1035
VL - 265
SP - 149
EP - 160
JO - Icarus
JF - Icarus
ER -