GLASS IN MANTLE-DERIVED PERIDOTITE XENOLITHS FROM THE McMURDO VOLCANIC GROUP, ANTARCTICA
Glass-bearing, mantle-derived peridotite xenoliths have been found in Late Cenozoic basanites at Turtle Rock and McMurdo Station, Ross Island, Antarctica. Glass in these xenoliths occurs as veinlets, interstitial pools, and thin films surrounding the primary xenolith minerals. The glass analyzed has...
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Department of Geology and Mineralogy, Facutly of Science, Hokkaido University
1990
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ftnipr:oai:nipr.repo.nii.ac.jp:00002631 2023-05-15T13:48:59+02:00 GLASS IN MANTLE-DERIVED PERIDOTITE XENOLITHS FROM THE McMURDO VOLCANIC GROUP, ANTARCTICA ニイダ キヨアキ Kiyoaki NIIDA 1990-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2631 http://id.nii.ac.jp/1291/00002631/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2631&item_no=1&attribute_id=18&file_no=1 en eng Department of Geology and Mineralogy, Facutly of Science, Hokkaido University National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2631 http://id.nii.ac.jp/1291/00002631/ AA1072335X Proceedings of the NIPR Symposium on Antarctic Geosciences, 4, 172-180(1990-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2631&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1990 ftnipr 2022-11-19T19:41:20Z Glass-bearing, mantle-derived peridotite xenoliths have been found in Late Cenozoic basanites at Turtle Rock and McMurdo Station, Ross Island, Antarctica. Glass in these xenoliths occurs as veinlets, interstitial pools, and thin films surrounding the primary xenolith minerals. The glass analyzed has three different compositions. Low-silica high-alkali glasses (42-48wt% SiO_2,4-6wt% Na_2O+K_2O) are likely to represent volatile-rich melts which were incorporated from the host basanite magma. High-silica low alkali glasses (53.5-56wt% SiO_2,4-5wt% Na_2O+K_2O) are non-alkaline and were possibly generated by decompressional breakdown of pargasitic amphibole. High-silica high-alkali glasses (55.5-57 wt% SiO_2,14-15 wt% Na_2O+K_2O) are unique and resemble the chemical composition of the most evolved nepheline-trachyte. Report Antarc* Antarctica Ross Island National Institute of Polar Research Repository, Japan Ross Island McMurdo Station ENVELOPE(166.667,166.667,-77.850,-77.850) Turtle Rock ENVELOPE(166.767,166.767,-77.733,-77.733) |
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Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Glass-bearing, mantle-derived peridotite xenoliths have been found in Late Cenozoic basanites at Turtle Rock and McMurdo Station, Ross Island, Antarctica. Glass in these xenoliths occurs as veinlets, interstitial pools, and thin films surrounding the primary xenolith minerals. The glass analyzed has three different compositions. Low-silica high-alkali glasses (42-48wt% SiO_2,4-6wt% Na_2O+K_2O) are likely to represent volatile-rich melts which were incorporated from the host basanite magma. High-silica low alkali glasses (53.5-56wt% SiO_2,4-5wt% Na_2O+K_2O) are non-alkaline and were possibly generated by decompressional breakdown of pargasitic amphibole. High-silica high-alkali glasses (55.5-57 wt% SiO_2,14-15 wt% Na_2O+K_2O) are unique and resemble the chemical composition of the most evolved nepheline-trachyte. |
format |
Report |
author |
ニイダ キヨアキ Kiyoaki NIIDA |
spellingShingle |
ニイダ キヨアキ Kiyoaki NIIDA GLASS IN MANTLE-DERIVED PERIDOTITE XENOLITHS FROM THE McMURDO VOLCANIC GROUP, ANTARCTICA |
author_facet |
ニイダ キヨアキ Kiyoaki NIIDA |
author_sort |
ニイダ キヨアキ |
title |
GLASS IN MANTLE-DERIVED PERIDOTITE XENOLITHS FROM THE McMURDO VOLCANIC GROUP, ANTARCTICA |
title_short |
GLASS IN MANTLE-DERIVED PERIDOTITE XENOLITHS FROM THE McMURDO VOLCANIC GROUP, ANTARCTICA |
title_full |
GLASS IN MANTLE-DERIVED PERIDOTITE XENOLITHS FROM THE McMURDO VOLCANIC GROUP, ANTARCTICA |
title_fullStr |
GLASS IN MANTLE-DERIVED PERIDOTITE XENOLITHS FROM THE McMURDO VOLCANIC GROUP, ANTARCTICA |
title_full_unstemmed |
GLASS IN MANTLE-DERIVED PERIDOTITE XENOLITHS FROM THE McMURDO VOLCANIC GROUP, ANTARCTICA |
title_sort |
glass in mantle-derived peridotite xenoliths from the mcmurdo volcanic group, antarctica |
publisher |
Department of Geology and Mineralogy, Facutly of Science, Hokkaido University |
publishDate |
1990 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2631 http://id.nii.ac.jp/1291/00002631/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2631&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(166.667,166.667,-77.850,-77.850) ENVELOPE(166.767,166.767,-77.733,-77.733) |
geographic |
Ross Island McMurdo Station Turtle Rock |
geographic_facet |
Ross Island McMurdo Station Turtle Rock |
genre |
Antarc* Antarctica Ross Island |
genre_facet |
Antarc* Antarctica Ross Island |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2631 http://id.nii.ac.jp/1291/00002631/ AA1072335X Proceedings of the NIPR Symposium on Antarctic Geosciences, 4, 172-180(1990-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2631&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250291609468928 |