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Transcript of Conference on Solar System Cosmochemistry and Planetary Science Studies in Hungary (September 4,...
Conference on Solar System Cosmochemistry and Planetary Science Studies in Hungary
(September 4, 2008)
New Application of Cathodoluminescence New Application of Cathodoluminescence
to Earth and Planetary Sciencesto Earth and Planetary Sciences
H.Nishido, M.Kayama,
T.Okumura and K.Ninagawa
(collaborated with Dr. Gucsik)
Okayama University of ScienceRASC
Type of luminescence Excitation source Application to geosciences
Thermoluminescence (TL) Thermal energy Dosimeter, Dating Optically Stimulated Luminescence (OSL) Visible light Dosimeter, Dating
Photoluminescence (PL) Ultraviolet radiation Mining exploration Cathodoluminescence (CL) Electrons Fabric and domain analysis Roentgenoluminescence (RL) X-rays Dosimeter Ionoluminescence Ions Dosimeter
Chemiluminescence Chemical reactions Water circulation analysis Bioluminescence Biochemical reactions Detection of micro biomats Triboluminescence Shear stress Bedrock monitoring sensor
Different types of luminescence
Type of luminescence Excitation source Application to geosciences
Thermoluminescence (TL) Thermal energy Dosimeter, Dating Optically Stimulated Luminescence (OSL) Visible light Dosimeter, Dating
Photoluminescence (PL) Ultraviolet radiation Mining exploration Cathodoluminescence (CL) Electrons Fabric and domain analysis Roentgenoluminescence (RL) X-rays Dosimeter Ionoluminescence Ions Dosimeter
Chemiluminescence Chemical reactions Water circulation analysis
Bioluminescence Biochemical reactions Detection of micro biomats Triboluminescence Shear stress Bedrock monitoring sensor
Different types of luminescence
Type of luminescence Excitation source Application to geosciences
Thermoluminescence (TL) Thermal energy Dosimeter, Dating Optically Stimulated Luminescence (OSL) Visible light Dosimeter, Dating
Photoluminescence (PL) Ultraviolet radiation Mining exploration Cathodoluminescence (CL) Electrons Fabric and domain analysis Roentgenoluminescence (RL) X-rays Dosimeter Ionoluminescence Ions Dosimeter
Chemiluminescence Chemical reactions Water circulation analysis
Bioluminescence Biochemical reactions Detection of micro biomats Triboluminescence Shear stress Bedrock monitoring sensor
Different types of luminescence
Quartz images by polarizing microscopy (Polmi)
and SEM‐CL microscopy (CL), Götze (2000).
Luminoscope ELM-3R (Nuclide Co. )
Cooled-CCD system : DS-5Mc (Nikon
Co.)
Optical system: Video lens (Edmund Co.)
・ Color imaging of CL
・ Comparison with petrological observation
Cold-cathode type CL instrument (Luminoscope)
E-type chondrite (Y-86004) width: 4.5 mm
Courtesy of Prof. Ninagawa
Phase I
Phase II
Phase III
CL image of Antarctic meteorite
SEM : JSM-5410LV ( JEOL Co. )Monochromator : Mono CL2 ( Oxford Instruments Co. )PMT : R2228 ( Hamamatsu Photonics Co. )Wavelength : 300 ~ 800 nmResolution : 0.5 nmTemperature : -196 ~ 400 C
Monochromator
・ CL spectral measurement
・ Comparison with SEM and BSE images, linked to EPMA
Hot-cathode type CL instrument (SEM-CL)
CL characterization of zoned zircon
A
B
C
D
Zircon from Osayama, Okayama Pref., Japan
A: Luminoscope CL image; B: Mono-CL image; C: CL spectral measurement positions; D: CL spectra
Conditions of shock metamorphism (from French, 1998)
shatter cone
Barringer impact crater, Arizona
Shocked quatrz
Meteor Impact → shock meatmorphism
PF (Planar Fractures) PDFs (Planar Deformation Features)
・ Conventional methods : Optical observation , TEM etc
・ New methods : CL imaging and spectroscopy,
Micro-Raman spectroscopy
Quartz
100 m 50 m
PDFsPF
PF and PDFs in quartz grains from Ries crater
Geological setting
Location map
Geological map
Occurrence
a: viewing from NE to SW; b: outcrop; c: chert vein
Sampling location map
Polarized microscope images
a b
c d
a, b, d: chert; c: sandstone
SEM images of HF etched quartz
a b
white arrow: "pillaring" texture; black arrow: "array" texture
PDF images
Optical image SEM-CL image
BSE imageSEM image
Raman spectral analysis
Micro-Raman spectra of shocked quartz from Mt. Oikeyama
Shocked quartz from Mt. Oikeyama
Optical image SEM-CL image
2D Raman mapping 3D Raman mapping
Bouguer anomaly map Impact crater structure
Concluding Remarks
・ CL method provide us a useful information on defect in the lattice and trace elements existed as a impurity, which are so difficult to characterize using any other conventional methods.
・ SEM-CL and micro-Raman spectroscopy enable to characterize crystallochemical properties of micro-size minerals in planetary science.
・ Further CL application can be expected to a new field in geosciences.