Rb-Sr mineral isochron ages of metamorphic rocks around Syowa Station and from the Yamato Mountains, East Antarctica
P(論文) Rb-Sr mineral isochron ages were determined for three metamorphic rocks around Syowa Station and from the Yamato Mountains, eastern Queen Maud Land. The Rb-Sr isotopic data demonstrate that the complete Sr isotopic homogenization occurred among K-feldspar, plagioclase, biotite and whole-rock,...
| Main Authors: | , , |
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| Language: | English |
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1985
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| Subjects: | |
| Online Access: | https://nipr.repo.nii.ac.jp/record/1791/files/KJ00000012423.pdf https://nipr.repo.nii.ac.jp/records/1791 |
| _version_ | 1829312481991852032 |
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| author | Shibata, Ken Yanai, Keizo Shiraishi, Kazuyuki |
| author_facet | Shibata, Ken Yanai, Keizo Shiraishi, Kazuyuki |
| author_sort | Shibata, Ken |
| collection | National Institute of Polar Research Repository, Japan |
| description | P(論文) Rb-Sr mineral isochron ages were determined for three metamorphic rocks around Syowa Station and from the Yamato Mountains, eastern Queen Maud Land. The Rb-Sr isotopic data demonstrate that the complete Sr isotopic homogenization occurred among K-feldspar, plagioclase, biotite and whole-rock, and define isochron ages of 482.5±9.5,468.9±7.8 and 493.3±4.5 Ma for rocks from Syowa Station, Skarvsnes and the Yamato Mountains, respectively. These ages probably represent the time of cooling after the regional metamorphism or granite intrusion. K-Ar age determinations on three metamorphic rocks give biotite and hornblende ages of 469±14,480±15 and 483±15Ma, and 502±15Ma, respectively. departmental bulletin paper |
| genre | Antarc* Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research Queen Maud Land |
| genre_facet | Antarc* Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research Queen Maud Land |
| geographic | East Antarctica Syowa Station Yamato Queen Maud Land Skarvsnes |
| geographic_facet | East Antarctica Syowa Station Yamato Queen Maud Land Skarvsnes |
| id | ftnipr:oai:nipr.repo.nii.ac.jp:00001791 |
| institution | Open Polar |
| language | English |
| long_lat | ENVELOPE(35.583,35.583,-71.417,-71.417) ENVELOPE(12.000,12.000,-72.500,-72.500) ENVELOPE(39.667,39.667,-69.467,-69.467) |
| op_collection_id | ftnipr |
| op_relation | Memoirs of National Institute of Polar Research. Special issue 37 164 171 AA00733561 https://nipr.repo.nii.ac.jp/record/1791/files/KJ00000012423.pdf https://nipr.repo.nii.ac.jp/records/1791 |
| publishDate | 1985 |
| record_format | openpolar |
| spelling | ftnipr:oai:nipr.repo.nii.ac.jp:00001791 2025-04-13T14:08:24+00:00 Rb-Sr mineral isochron ages of metamorphic rocks around Syowa Station and from the Yamato Mountains, East Antarctica Shibata, Ken Yanai, Keizo Shiraishi, Kazuyuki 1985-09 application/pdf https://nipr.repo.nii.ac.jp/record/1791/files/KJ00000012423.pdf https://nipr.repo.nii.ac.jp/records/1791 eng eng Memoirs of National Institute of Polar Research. Special issue 37 164 171 AA00733561 https://nipr.repo.nii.ac.jp/record/1791/files/KJ00000012423.pdf https://nipr.repo.nii.ac.jp/records/1791 1985 ftnipr 2025-03-19T10:19:56Z P(論文) Rb-Sr mineral isochron ages were determined for three metamorphic rocks around Syowa Station and from the Yamato Mountains, eastern Queen Maud Land. The Rb-Sr isotopic data demonstrate that the complete Sr isotopic homogenization occurred among K-feldspar, plagioclase, biotite and whole-rock, and define isochron ages of 482.5±9.5,468.9±7.8 and 493.3±4.5 Ma for rocks from Syowa Station, Skarvsnes and the Yamato Mountains, respectively. These ages probably represent the time of cooling after the regional metamorphism or granite intrusion. K-Ar age determinations on three metamorphic rocks give biotite and hornblende ages of 469±14,480±15 and 483±15Ma, and 502±15Ma, respectively. departmental bulletin paper Other/Unknown Material Antarc* Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research Queen Maud Land National Institute of Polar Research Repository, Japan East Antarctica Syowa Station Yamato ENVELOPE(35.583,35.583,-71.417,-71.417) Queen Maud Land ENVELOPE(12.000,12.000,-72.500,-72.500) Skarvsnes ENVELOPE(39.667,39.667,-69.467,-69.467) |
| spellingShingle | Shibata, Ken Yanai, Keizo Shiraishi, Kazuyuki Rb-Sr mineral isochron ages of metamorphic rocks around Syowa Station and from the Yamato Mountains, East Antarctica |
| title | Rb-Sr mineral isochron ages of metamorphic rocks around Syowa Station and from the Yamato Mountains, East Antarctica |
| title_full | Rb-Sr mineral isochron ages of metamorphic rocks around Syowa Station and from the Yamato Mountains, East Antarctica |
| title_fullStr | Rb-Sr mineral isochron ages of metamorphic rocks around Syowa Station and from the Yamato Mountains, East Antarctica |
| title_full_unstemmed | Rb-Sr mineral isochron ages of metamorphic rocks around Syowa Station and from the Yamato Mountains, East Antarctica |
| title_short | Rb-Sr mineral isochron ages of metamorphic rocks around Syowa Station and from the Yamato Mountains, East Antarctica |
| title_sort | rb-sr mineral isochron ages of metamorphic rocks around syowa station and from the yamato mountains, east antarctica |
| url | https://nipr.repo.nii.ac.jp/record/1791/files/KJ00000012423.pdf https://nipr.repo.nii.ac.jp/records/1791 |