Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 149-160 |
| Number of pages | 12 |
| Journal | Icarus |
| Volume | 265 |
| DOIs | |
| Publication status | Published - Feb 1 2016 |
| Externally published | Yes |
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Keywords
- Asteroid Ceres
- Meteorites
- Mineralogy
- Spectroscopy
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science
Cite this
Spectral parameters for Dawn FC color data : Carbonaceous chondrites and aqueous alteration products as potential cerean analog materials. / Schäfer, Tanja; Nathues, Andreas; Mengel, Kurt; Richar Izawa, Matthew; Cloutis, Edward A.; Schäfer, Michael; Hoffmann, Martin.
In: Icarus, Vol. 265, 01.02.2016, p. 149-160.Research output: Contribution to journal › Article
}
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 - Richar Izawa, Matthew
AU - Cloutis, Edward A.
AU - Schäfer, Michael
AU - Hoffmann, Martin
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
UR - http://www.scopus.com/inward/record.url?scp=84946429724&partnerID=8YFLogxK
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
VL - 265
SP - 149
EP - 160
JO - Icarus
JF - Icarus
SN - 0019-1035
ER -