acve remote sensing of elemental...
TRANSCRIPT
![Page 1: Acve Remote Sensing of Elemental Chemistrywray.eas.gatech.edu/remotesensing2017/LectureNotes/RS... · 2017. 11. 11. · sol46 JakeMatijevic 30 min NASA/JPL-Caltech/U. Guelph APXS](https://reader034.vdocument.in/reader034/viewer/2022051804/5fed4b07f17aac2dd618ad9a/html5/thumbnails/1.jpg)
Ac#veRemoteSensingofElementalChemistry
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Wiensetal.(2012)
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ChemCam spectra of Coronation NASA/JPL-Caltech/LANL/CNES/IRAP
NASA/JPL-Caltech/MSSS
Target:Corona,on(N165)Sol13Shots:30
NASA/JPL-Caltech/LANL/CNES/IRAP/IAS/MSSSRemoteMicroImage5.4cm(2.1”)Across
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“Sheepbed” rocks contain 1 to 5-mm fractures filled with calcium sulfate minerals that precipitated from fluids at low to moderate temperatures
NASA/JPL-Caltech/LANL/CNES/IRAP/IAS/LPGN/CNRS/LGLyon/Planet-Terre
ChemCamspectrafromsol125“Crest”and135“Rapitan”
ChemCamRemoteMicro-Imager
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Jake Matijevic studied by Mastcam (image), APXS, and ChemCam
NASA/JPL-Caltech/MSSSLANL/IRAP/CNES/IAS/LPGN
Composition is similar to alkaline basalts on Earth produced by partial melting of the mantle
0 1 2 3 4 5 6 7 8 9 10 11 12 13
0.01
0.1
1
10
BrZn
Ni
Fe
Mn
Cr
Ti
CaKCl
S
P
Si
Mg
Al
Na
coun
ts p
er s
econ
d
Energy [keV]
sol34 Caltarget 90 min sol46 JakeMatijevic 30 min
NASA/JPL-Caltech/U.Guelph
APXSSpectra
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IndependentComponentsAnalysisofLIBSdatafromMars
Meslinetal.(2013)
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PrincipalComponentsAnalysisappliedtoLIBS
Andersonetal.(2011)
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RamanSpectroscopy
Ac#veRemoteSensingofMineralogy
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• Rayleigh-scaOeredphotons~107RmesmoreabundantthanRaman-scaOeredphotons!
• Stokes>AnR-Stokesbecauseexcitedstatesareminimallypopulatedatroomtemperature
Ramaneffect:inelasRcphotonscaOering
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Raman:emissionlinespectroscopy
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It’sallabouttheshi9
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Organics
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Ramanvs.IRspectra:relatedbutdifferent
Ferinietal.(2004)
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Candetectarangeofminerals
Sharppeakswithminimaloverlap
…andmixtures!
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PeaksshiawithchemistryandhydraRonstate
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• ScaOeredpowerproporRonalto1/λ4
• Butshorterλalsoincreasesfluorescence
Whatlaserλtouse?
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Raman+LIBS:Chemicalandmineralogicalremotesensingwithasingleinstrument!?
Wiensetal.(LPSC2012)