PETROCHEMICAL CHARACTERISTICS OF SOME ULTRAMAFIC GRANULITES IN ONGUL ISLANDS, EAST ANTARCTICA
Ultramafic granulites in the East and West Ongul Islands area can be grouped into at least two types, A (free from plagioclase and garnet) and B (with plagioclase and/or garnet). Type A tends to occur as massive isolated blocks or pods and type B as concordant sheets. Both of the types with differen...
Main Authors: | , |
---|---|
Format: | Report |
Language: | English |
Published: |
ABSTRACT
1987
|
Subjects: | |
Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2546 http://id.nii.ac.jp/1291/00002546/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2546&item_no=1&attribute_id=18&file_no=1 |
id |
ftnipr:oai:nipr.repo.nii.ac.jp:00002546 |
---|---|
record_format |
openpolar |
spelling |
ftnipr:oai:nipr.repo.nii.ac.jp:00002546 2023-05-15T13:48:59+02:00 PETROCHEMICAL CHARACTERISTICS OF SOME ULTRAMAFIC GRANULITES IN ONGUL ISLANDS, EAST ANTARCTICA スズキ モリヒサ Morihisa SUZUKI 1987-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2546 http://id.nii.ac.jp/1291/00002546/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2546&item_no=1&attribute_id=18&file_no=1 en eng ABSTRACT Institute of Geology and Mineralogy, Faculty of Science, Hiroshima University National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2546 http://id.nii.ac.jp/1291/00002546/ AA1072335X Proceedings of the NIPR Symposium on Antarctic Geosciences, 1, 197(1987-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2546&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1987 ftnipr 2022-11-19T19:41:20Z Ultramafic granulites in the East and West Ongul Islands area can be grouped into at least two types, A (free from plagioclase and garnet) and B (with plagioclase and/or garnet). Type A tends to occur as massive isolated blocks or pods and type B as concordant sheets. Both of the types with different mode of occurrence and mineralogy show different petrochemical characteristics from each other. Type A is relatively rich in MgO and poor in Al_2O_3,K_2O and TiO_2 as compared with type B. Judged from the mode of occurrence and petrochemical characters, both types of ultramafic granulites as a whole are inferred to have been originated from the rocks intimately related with cumulate complexes. Type A is poorer in such incompatible elements as Ti and K than type B, so the degree of partial melting to give birth to the original rocks of the former is rather higher than the case of the latter. Moreover, it is worthy of note that most of the metabasites in the Prince Olav Coast, which are free from orthopyroxene, are plotted in the compositional range of type B here defined, and orthopyroxene-bearing extraordinary ones are plotted out of the range. More detailed investigations on the mode of occurrence, classification and the spatial distribution of ultramafic rocks in the Lutzow-Holm Complex will contribute to the knowledge on their origin and the tectonic setting of the Complex. Report Antarc* Antarctica East Antarctica Prince Olav Coast National Institute of Polar Research Repository, Japan East Antarctica Ongul ENVELOPE(39.533,39.533,-69.017,-69.017) Prince Olav Coast ENVELOPE(41.000,41.000,-69.000,-69.000) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Ultramafic granulites in the East and West Ongul Islands area can be grouped into at least two types, A (free from plagioclase and garnet) and B (with plagioclase and/or garnet). Type A tends to occur as massive isolated blocks or pods and type B as concordant sheets. Both of the types with different mode of occurrence and mineralogy show different petrochemical characteristics from each other. Type A is relatively rich in MgO and poor in Al_2O_3,K_2O and TiO_2 as compared with type B. Judged from the mode of occurrence and petrochemical characters, both types of ultramafic granulites as a whole are inferred to have been originated from the rocks intimately related with cumulate complexes. Type A is poorer in such incompatible elements as Ti and K than type B, so the degree of partial melting to give birth to the original rocks of the former is rather higher than the case of the latter. Moreover, it is worthy of note that most of the metabasites in the Prince Olav Coast, which are free from orthopyroxene, are plotted in the compositional range of type B here defined, and orthopyroxene-bearing extraordinary ones are plotted out of the range. More detailed investigations on the mode of occurrence, classification and the spatial distribution of ultramafic rocks in the Lutzow-Holm Complex will contribute to the knowledge on their origin and the tectonic setting of the Complex. |
format |
Report |
author |
スズキ モリヒサ Morihisa SUZUKI |
spellingShingle |
スズキ モリヒサ Morihisa SUZUKI PETROCHEMICAL CHARACTERISTICS OF SOME ULTRAMAFIC GRANULITES IN ONGUL ISLANDS, EAST ANTARCTICA |
author_facet |
スズキ モリヒサ Morihisa SUZUKI |
author_sort |
スズキ モリヒサ |
title |
PETROCHEMICAL CHARACTERISTICS OF SOME ULTRAMAFIC GRANULITES IN ONGUL ISLANDS, EAST ANTARCTICA |
title_short |
PETROCHEMICAL CHARACTERISTICS OF SOME ULTRAMAFIC GRANULITES IN ONGUL ISLANDS, EAST ANTARCTICA |
title_full |
PETROCHEMICAL CHARACTERISTICS OF SOME ULTRAMAFIC GRANULITES IN ONGUL ISLANDS, EAST ANTARCTICA |
title_fullStr |
PETROCHEMICAL CHARACTERISTICS OF SOME ULTRAMAFIC GRANULITES IN ONGUL ISLANDS, EAST ANTARCTICA |
title_full_unstemmed |
PETROCHEMICAL CHARACTERISTICS OF SOME ULTRAMAFIC GRANULITES IN ONGUL ISLANDS, EAST ANTARCTICA |
title_sort |
petrochemical characteristics of some ultramafic granulites in ongul islands, east antarctica |
publisher |
ABSTRACT |
publishDate |
1987 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2546 http://id.nii.ac.jp/1291/00002546/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2546&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(39.533,39.533,-69.017,-69.017) ENVELOPE(41.000,41.000,-69.000,-69.000) |
geographic |
East Antarctica Ongul Prince Olav Coast |
geographic_facet |
East Antarctica Ongul Prince Olav Coast |
genre |
Antarc* Antarctica East Antarctica Prince Olav Coast |
genre_facet |
Antarc* Antarctica East Antarctica Prince Olav Coast |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2546 http://id.nii.ac.jp/1291/00002546/ AA1072335X Proceedings of the NIPR Symposium on Antarctic Geosciences, 1, 197(1987-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2546&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250278371196928 |