Mineralogy and IR spectroscopy of the Tagish Lake C2 chondrite and enstatite chondrites
Sample-correlated X-ray diffraction (XRD) and diffuse-reflectance Fourier- transform infrared (DRIFTS) spectra were collected for seven samples of the Tagish Lake C2 chondrite and thirteen enstatite chondrites. A reconnaissance of the Tagish Lake chondrite was carried out using micro-XRD, SEM-EDX an...
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ftunivwestonta:oai:ir.lib.uwo.ca:digitizedtheses-8139 2023-12-03T10:31:01+01:00 Mineralogy and IR spectroscopy of the Tagish Lake C2 chondrite and enstatite chondrites Izawa, Matthew Richard Mitsuomi 2008-01-01T08:00:00Z application/pdf https://ir.lib.uwo.ca/digitizedtheses/4320 https://ir.lib.uwo.ca/context/digitizedtheses/article/8139/viewcontent/2023_10_26_Tagish_lake_and_E_chondrites_mineralogy_and_IR_spectroscopy_OCR.pdf unknown Scholarship@Western https://ir.lib.uwo.ca/digitizedtheses/4320 https://ir.lib.uwo.ca/context/digitizedtheses/article/8139/viewcontent/2023_10_26_Tagish_lake_and_E_chondrites_mineralogy_and_IR_spectroscopy_OCR.pdf Digitized Theses X-ray diffraction Reflectance infrared spectroscopy Rietveld refinement chondrules CAI parent body alteration terrestrial alteration meteorite grain density text 2008 ftunivwestonta 2023-11-05T00:11:21Z Sample-correlated X-ray diffraction (XRD) and diffuse-reflectance Fourier- transform infrared (DRIFTS) spectra were collected for seven samples of the Tagish Lake C2 chondrite and thirteen enstatite chondrites. A reconnaissance of the Tagish Lake chondrite was carried out using micro-XRD, SEM-EDX and EPMA. Modal mineral abundances were obtained from XRD data via Rietveld refinement. Grain densities were calculated for each sample based on the modal abundances. DRIFTS spectra are analogous to remote-sensing emission IR spectra, facilitating comparison with astronomical observations. Tagish Lake was found to be more varied in major mineralogy than has previously been reported. In addition to the documented carbonate-rich and carbonate-poor lithologies, a magnetite- and- sulphide-rich lithology, and a carbonaterich, siderite-dominated lithology have been observed. Several Tagish Lake samples may contain extraterrestrial sulphates. Terrestrially altered enstatite chondrites may be analogous to the regolith of certain rare M- and E-type asteroids (“W-class”) which possess a spectral feature consistent with hydrated minerals. Text Tagish The University of Western Ontario: Scholarship@Western Tagish ENVELOPE(-134.272,-134.272,60.313,60.313) Tagish Lake ENVELOPE(-134.233,-134.233,59.717,59.717) |
institution |
Open Polar |
collection |
The University of Western Ontario: Scholarship@Western |
op_collection_id |
ftunivwestonta |
language |
unknown |
topic |
X-ray diffraction Reflectance infrared spectroscopy Rietveld refinement chondrules CAI parent body alteration terrestrial alteration meteorite grain density |
spellingShingle |
X-ray diffraction Reflectance infrared spectroscopy Rietveld refinement chondrules CAI parent body alteration terrestrial alteration meteorite grain density Izawa, Matthew Richard Mitsuomi Mineralogy and IR spectroscopy of the Tagish Lake C2 chondrite and enstatite chondrites |
topic_facet |
X-ray diffraction Reflectance infrared spectroscopy Rietveld refinement chondrules CAI parent body alteration terrestrial alteration meteorite grain density |
description |
Sample-correlated X-ray diffraction (XRD) and diffuse-reflectance Fourier- transform infrared (DRIFTS) spectra were collected for seven samples of the Tagish Lake C2 chondrite and thirteen enstatite chondrites. A reconnaissance of the Tagish Lake chondrite was carried out using micro-XRD, SEM-EDX and EPMA. Modal mineral abundances were obtained from XRD data via Rietveld refinement. Grain densities were calculated for each sample based on the modal abundances. DRIFTS spectra are analogous to remote-sensing emission IR spectra, facilitating comparison with astronomical observations. Tagish Lake was found to be more varied in major mineralogy than has previously been reported. In addition to the documented carbonate-rich and carbonate-poor lithologies, a magnetite- and- sulphide-rich lithology, and a carbonaterich, siderite-dominated lithology have been observed. Several Tagish Lake samples may contain extraterrestrial sulphates. Terrestrially altered enstatite chondrites may be analogous to the regolith of certain rare M- and E-type asteroids (“W-class”) which possess a spectral feature consistent with hydrated minerals. |
format |
Text |
author |
Izawa, Matthew Richard Mitsuomi |
author_facet |
Izawa, Matthew Richard Mitsuomi |
author_sort |
Izawa, Matthew Richard Mitsuomi |
title |
Mineralogy and IR spectroscopy of the Tagish Lake C2 chondrite and enstatite chondrites |
title_short |
Mineralogy and IR spectroscopy of the Tagish Lake C2 chondrite and enstatite chondrites |
title_full |
Mineralogy and IR spectroscopy of the Tagish Lake C2 chondrite and enstatite chondrites |
title_fullStr |
Mineralogy and IR spectroscopy of the Tagish Lake C2 chondrite and enstatite chondrites |
title_full_unstemmed |
Mineralogy and IR spectroscopy of the Tagish Lake C2 chondrite and enstatite chondrites |
title_sort |
mineralogy and ir spectroscopy of the tagish lake c2 chondrite and enstatite chondrites |
publisher |
Scholarship@Western |
publishDate |
2008 |
url |
https://ir.lib.uwo.ca/digitizedtheses/4320 https://ir.lib.uwo.ca/context/digitizedtheses/article/8139/viewcontent/2023_10_26_Tagish_lake_and_E_chondrites_mineralogy_and_IR_spectroscopy_OCR.pdf |
long_lat |
ENVELOPE(-134.272,-134.272,60.313,60.313) ENVELOPE(-134.233,-134.233,59.717,59.717) |
geographic |
Tagish Tagish Lake |
geographic_facet |
Tagish Tagish Lake |
genre |
Tagish |
genre_facet |
Tagish |
op_source |
Digitized Theses |
op_relation |
https://ir.lib.uwo.ca/digitizedtheses/4320 https://ir.lib.uwo.ca/context/digitizedtheses/article/8139/viewcontent/2023_10_26_Tagish_lake_and_E_chondrites_mineralogy_and_IR_spectroscopy_OCR.pdf |
_version_ |
1784257149843537920 |