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Cathodoluminescence color zonation in the Antarctic meteorite (enstatite chondrite) of Yamato 86004

Syuhei Ohgo

Syuhei Ohgo

Department of Biosphere-Geosphere Science, Okayama University of ScienceOkayama, Japan
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Ohgo, Syuhei
, 
Maki Mishima

Maki Mishima

Department of Applied Physics, Okayama University of ScienceOkayama, Japan
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Mishima, Maki
, 
Minoru Endo

Minoru Endo

Department of Applied Physics, Okayama University of ScienceOkayama, Japan
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Endo, Minoru
, 
Kiyotaka Ninagawa

Kiyotaka Ninagawa

Department of Applied Physics, Okayama University of ScienceOkayama, Japan
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Ninagawa, Kiyotaka
 oraz 
Hirotsugu Nishido

Hirotsugu Nishido

Department of Biosphere-Geosphere Science, Okayama University of ScienceOkayama, Japan
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Nishido, Hirotsugu
  
01 cze 2017
Cathodoluminescence color zonation in the Antarctic meteorite (enstatite chondrite) of Yamato 86004's Cover Image
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Kategoria artykułu: Conference Proceedings of the 4Asia Pacific Luminescence and Electron Spin Resonance Dating Conference Nov 23-25, 2015, Adelaide, Australia
Data publikacji: 01 cze 2017
Zakres stron: 136 - 141
Otrzymano: 14 mar 2016
Przyjęty: 11 sty 2017
DOI: https://doi.org/10.1515/geochr-2015-0053
Słowa kluczowe
© 2016 S. Ohgo.
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

(a) Color CL image of Y-86004. Yellow cross marks indicating the positions in CL-spectral measurement. (b) Parallel-polarizing microscope image of Y-86004 corresponding to the area in Fig. 1a. (c) Color-CL image of Y-86004 indicating boundaries between each zone. Zone 1: blue-CL area, zone 2: light-blue-CL area, zone 3: red-CL area. (d) BSE image of Y-86004 corresponding to the area indicating a square in Fig. 1c. Zone 1: blue-CL area, zone 2: light-blue CL area, zone 3: red-CL area, zone 4: non-CL area (fusion crust). en: enstatite, tri: tridymite, pl: plagioclase and opq: opaque minerals.
(a) Color CL image of Y-86004. Yellow cross marks indicating the positions in CL-spectral measurement. (b) Parallel-polarizing microscope image of Y-86004 corresponding to the area in Fig. 1a. (c) Color-CL image of Y-86004 indicating boundaries between each zone. Zone 1: blue-CL area, zone 2: light-blue-CL area, zone 3: red-CL area. (d) BSE image of Y-86004 corresponding to the area indicating a square in Fig. 1c. Zone 1: blue-CL area, zone 2: light-blue CL area, zone 3: red-CL area, zone 4: non-CL area (fusion crust). en: enstatite, tri: tridymite, pl: plagioclase and opq: opaque minerals.

Figure 2

CL spectra for the enstatite indicated by cross marks (Fig. 1a).
CL spectra for the enstatite indicated by cross marks (Fig. 1a).

Figure 3

Deconvolution of CL spectrum of blue-CL enstatite in energy units by Gaussian curve fitting.
Deconvolution of CL spectrum of blue-CL enstatite in energy units by Gaussian curve fitting.

Figure 4

Deconvolution of CL spectrum of light-blue-CL enstatite in energy units by Gaussian curve fitting.
Deconvolution of CL spectrum of light-blue-CL enstatite in energy units by Gaussian curve fitting.

Figure 5

Deconvolution of CL spectrum of red-CL enstatite in energy units by Gaussian curve fitting.
Deconvolution of CL spectrum of red-CL enstatite in energy units by Gaussian curve fitting.

Figure 6

Comparison of theoretical temperature profiles. Heating duration assumed 5–20 seconds.
Comparison of theoretical temperature profiles. Heating duration assumed 5–20 seconds.

Chemical compositions on an average of three analyses of the enstatite with different CL colors and fusion crust in each zone_ n_d_: not detected_

Enstatite in zone 1Enstatite in zone 2Enstatite in zone 3Fusion crust in zone 4
SiO259.8059.9659.2053.90wt.%
TiO2n.d.0.01n.d.n.d.
Al2O30.110.100.074.24
FeO0.430.110.6030.60
Cr2O30.02n.d.0.020.39
MnOn.d.n.d.0.040.94
MgO39.8139.7439.485.05
CaO0.260.280.243.55
NiO0.010.010.06n.d.
Na2O0.01n.d.n.d.1.41
K2O0.010.010.01n.d.
Total100.46100.2299.73100.00
Język:
Angielski
Częstotliwość wydawania:
1 razy w roku
Dziedziny czasopisma:
Nauki o Ziemi, Nauki o Ziemi, inne
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