Laser-Raman spectroscopic studies on graphite from East Antarctica
We report here the Laser-Raman spectroscopic data on the carbonaceous matter (CM) from Schirmacher Oasis (70°45'S, 11°40'E), East Antarctica for the first time. The sample was collected from the Precambrian rock, which consists of garnet-biotite gneiss. The first order Laser-Raman spectra...
Main Authors: | , , , , |
---|---|
Format: | Report |
Language: | English |
Published: |
National Geophysical Research Institute/National Geophysical Research Institute/Indira Gandhi Centre for Atomic Research/Indira Gandhi Centre for Atomic Research/National Geophysical Research Institute
2001
|
Subjects: | |
Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3091 http://id.nii.ac.jp/1291/00003091/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3091&item_no=1&attribute_id=18&file_no=1 |
id |
ftnipr:oai:nipr.repo.nii.ac.jp:00003091 |
---|---|
record_format |
openpolar |
spelling |
ftnipr:oai:nipr.repo.nii.ac.jp:00003091 2023-05-15T13:49:00+02:00 Laser-Raman spectroscopic studies on graphite from East Antarctica Sharma,Shadi R. Parthasarathy,Gopalakrishnarao Ravindran,T.R. Arora,Akhilesh K. Hussain, Sayed M. 2001-10 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3091 http://id.nii.ac.jp/1291/00003091/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3091&item_no=1&attribute_id=18&file_no=1 en eng National Geophysical Research Institute/National Geophysical Research Institute/Indira Gandhi Centre for Atomic Research/Indira Gandhi Centre for Atomic Research/National Geophysical Research Institute National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3091 http://id.nii.ac.jp/1291/00003091/ AA1130866X Polar geoscience, 14, 157-164(2001-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3091&item_no=1&attribute_id=18&file_no=1 Laser-Raman studies East Antarctica Schirmacher Oasis Graphitization metamorphism Departmental Bulletin Paper P(論文) 2001 ftnipr 2022-11-26T19:42:23Z We report here the Laser-Raman spectroscopic data on the carbonaceous matter (CM) from Schirmacher Oasis (70°45'S, 11°40'E), East Antarctica for the first time. The sample was collected from the Precambrian rock, which consists of garnet-biotite gneiss. The first order Laser-Raman spectra of the sample shows a strong well-ordered Raman peak (0) at 1581 cm^<-1> and a weak broad peak due to disorder (D) at 1354 cm^<-1>. The intensity ratio disordered-to-ordered Raman peak (D/O)_ has been used to estimate the in-plan crystallite size (L_a) of the graphite. The experimental values of D/0=0.143 and D/D+O=0.125 indicate that the CM is well crystallized graphite, thereby indicating the high metamorphic grade of the host rocks. Powder X-ray diffraction studies on the same sample of CM also indicate that the CM is well-crystalline hexagonal graphite with d_<002>=0.3354 nm. The structural parameters obtained by Raman spectroscopic method and the estimated in-plane crystallite size (L_a=298A) indicate that the metamorphic grade of the host rock of the studied sample falls in the upper sillimanite zone. The present study suggests that the peak metamorphic temperature of the host rock could be in the temperature range of about 700℃. Report Antarc* Antarctica East Antarctica Polar geoscience National Institute of Polar Research Repository, Japan East Antarctica Broad Peak ENVELOPE(-71.231,-71.231,70.495,70.495) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
Laser-Raman studies East Antarctica Schirmacher Oasis Graphitization metamorphism |
spellingShingle |
Laser-Raman studies East Antarctica Schirmacher Oasis Graphitization metamorphism Sharma,Shadi R. Parthasarathy,Gopalakrishnarao Ravindran,T.R. Arora,Akhilesh K. Hussain, Sayed M. Laser-Raman spectroscopic studies on graphite from East Antarctica |
topic_facet |
Laser-Raman studies East Antarctica Schirmacher Oasis Graphitization metamorphism |
description |
We report here the Laser-Raman spectroscopic data on the carbonaceous matter (CM) from Schirmacher Oasis (70°45'S, 11°40'E), East Antarctica for the first time. The sample was collected from the Precambrian rock, which consists of garnet-biotite gneiss. The first order Laser-Raman spectra of the sample shows a strong well-ordered Raman peak (0) at 1581 cm^<-1> and a weak broad peak due to disorder (D) at 1354 cm^<-1>. The intensity ratio disordered-to-ordered Raman peak (D/O)_ has been used to estimate the in-plan crystallite size (L_a) of the graphite. The experimental values of D/0=0.143 and D/D+O=0.125 indicate that the CM is well crystallized graphite, thereby indicating the high metamorphic grade of the host rocks. Powder X-ray diffraction studies on the same sample of CM also indicate that the CM is well-crystalline hexagonal graphite with d_<002>=0.3354 nm. The structural parameters obtained by Raman spectroscopic method and the estimated in-plane crystallite size (L_a=298A) indicate that the metamorphic grade of the host rock of the studied sample falls in the upper sillimanite zone. The present study suggests that the peak metamorphic temperature of the host rock could be in the temperature range of about 700℃. |
format |
Report |
author |
Sharma,Shadi R. Parthasarathy,Gopalakrishnarao Ravindran,T.R. Arora,Akhilesh K. Hussain, Sayed M. |
author_facet |
Sharma,Shadi R. Parthasarathy,Gopalakrishnarao Ravindran,T.R. Arora,Akhilesh K. Hussain, Sayed M. |
author_sort |
Sharma,Shadi R. |
title |
Laser-Raman spectroscopic studies on graphite from East Antarctica |
title_short |
Laser-Raman spectroscopic studies on graphite from East Antarctica |
title_full |
Laser-Raman spectroscopic studies on graphite from East Antarctica |
title_fullStr |
Laser-Raman spectroscopic studies on graphite from East Antarctica |
title_full_unstemmed |
Laser-Raman spectroscopic studies on graphite from East Antarctica |
title_sort |
laser-raman spectroscopic studies on graphite from east antarctica |
publisher |
National Geophysical Research Institute/National Geophysical Research Institute/Indira Gandhi Centre for Atomic Research/Indira Gandhi Centre for Atomic Research/National Geophysical Research Institute |
publishDate |
2001 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3091 http://id.nii.ac.jp/1291/00003091/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3091&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(-71.231,-71.231,70.495,70.495) |
geographic |
East Antarctica Broad Peak |
geographic_facet |
East Antarctica Broad Peak |
genre |
Antarc* Antarctica East Antarctica Polar geoscience |
genre_facet |
Antarc* Antarctica East Antarctica Polar geoscience |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3091 http://id.nii.ac.jp/1291/00003091/ AA1130866X Polar geoscience, 14, 157-164(2001-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3091&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250344542633984 |