Acve Remote Sensing of Elemental...

Ac#veRemoteSensingofElementalChemistry

Wiensetal.(2012)

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

“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

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

IndependentComponentsAnalysisofLIBSdatafromMars

Meslinetal.(2013)

PrincipalComponentsAnalysisappliedtoLIBS

Andersonetal.(2011)

RamanSpectroscopy

Ac#veRemoteSensingofMineralogy

•  Rayleigh-scaOeredphotons~107RmesmoreabundantthanRaman-scaOeredphotons!

•  Stokes>AnR-Stokesbecauseexcitedstatesareminimallypopulatedatroomtemperature

Ramaneffect:inelasRcphotonscaOering

Raman:emissionlinespectroscopy

It’sallabouttheshi9

Organics

Ramanvs.IRspectra:relatedbutdifferent

Ferinietal.(2004)

Candetectarangeofminerals

Sharppeakswithminimaloverlap

…andmixtures!

PeaksshiawithchemistryandhydraRonstate

•  ScaOeredpowerproporRonalto1/λ4

•  Butshorterλalsoincreasesfluorescence

Whatlaserλtouse?

Raman+LIBS:Chemicalandmineralogicalremotesensingwithasingleinstrument!?

Wiensetal.(LPSC2012)