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

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

Geochronometria
Volume 44 (2017): Issue 1 (January 2017)
By: Syuhei Ohgo,  Maki Mishima,  Minoru Endo,  Kiyotaka Ninagawa and  Hirotsugu Nishido  
Open Access
|Jun 2017

Figures & Tables

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.

Figure 2

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.

Figure 4

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.

Figure 6

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
DOI: https://doi.org/10.1515/geochr-2015-0053 | Journal eISSN: 1897-1695
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Language: English
Page range: 136 - 141
Submitted on: Mar 14, 2016
|
Accepted on: Jan 11, 2017
|
Published on: Jun 1, 2017
Published by: Sciendo
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year
Keywords:
enstatite,
cathodoluminescence,
enstatite chondrite,
Antarctic meteorite
Related subjects:
Geosciences,
Geosciences, other

© 2017 Syuhei Ohgo, Maki Mishima, Minoru Endo, Kiyotaka Ninagawa, Hirotsugu Nishido, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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