2006 Fiscal Year Final Research Report Summary
Dating of Quaternary Sediments and Ice Sheets History in East Antarctica
| Project/Area Number |
16300296
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geography
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| Research Institution | Nara Women's University |
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Principal Investigator |
TAKADA Masashi Nara Women's University, Faculty of Letters, Associate Professor, 文学部, 助教授 (60273827)
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| Co-Investigator(Kenkyū-buntansha) |
MAEMOKU Hideaki Hiroshima University, Graduate School of Education, Associate Professor, 大学院・教育学研究科, 助教授 (50222287)
YOKOYAMA Yusuke The University of Tokyo, Department of Earth and Planetary Sciences, Lecturer, 大学院・理学研究科, 講師 (10359648)
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| Project Period (FY) |
2004 – 2006
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| Keywords | East Antarctica / Quaternary sediments / ^<14>C ages / ice sheet / OSL dating / ESR dating / conmogenic dating |
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| Research Abstract |
We have been studied the stratigraphic relationship between raised beach deposits including in-situ fossil shells and glacial deposits in the Lutzow-Holm Bay region, East Antarctica, to clarify that the Antarctic ice sheet, unlike the northern hemisphere ice sheet, was not the greatest during the marine isotope stage (MIS) 2 but the greatest at the age older than 46 ka. The 46 ka is, however, close to the limit of 14C analysis and sensitive to the effect of contamination. Therefore, ages obtained by other dating methods would be of great help in interpreting those data. For this reason we investigate on optically stimulated luminescence (OSL), electron spin reasonance (ESR) and cosmogenic dates of Quaternary sediments in the Lutzow-Holm Bay region, East Antarctica, to compare them with AMS 14C dates and to discuss on late Pleistocene chronology.
Though some OSL or cosmogenic ages from our samples dearly differ from 14C ages, most of OSL, 14C, and cosmogenic dates seem to be consistent if we take calibration factors such as reservoir correction into account. While we should make further sophisticated dating experiments, we can reconfirm that the East Antarctic Ice Sheet did not re-advance to the ice-free area on the northernmost part of the Soya Coast during the LGM. There is a possibility that the ice sheet retreated from the area during the period prior to about 50,000 or 80,000 yrBP.
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Research Products
(18 results)
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[Journal Article] AMS^<14>C and OSL ages of Quaternary sediments in the Lutzow-Holm Bay region, East Antarctica.2006
Author(s)
Takada, M., Miura, H., Maemoku, M., Yokoyama, Y., Iwasaki, S.
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Journal Title
First Asia-Pacific Conference on Luminescence Dating, 23-26 October 2006, Book of Abstracts 23 October2006
Pages: 45
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Holocene glacial fluctuation reconstructed from glacio-marine sediments at Skallen in the Lutzow-Holm Bay, East Antarctica.2006
Author(s)
Maemoku, H., Miura, H., Iwasaki, S., Yokoyama, Y., Matsuzaki, H.
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Journal Title
Eos Trans. AGU(CD-ROM; 2006 AGU Fall Meeting Program and Abstracts) Fall Meet. Suppl. 87(52)
Pages: GC21A-1315
Description
「研究成果報告書概要(和文)」より
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[Journal Article] AMS 14C and OSL ages of Quaternary Sediments in the Liitzow-Holm Bay region, East Antarctica.2006
Author(s)
Takada, M., Miura, H., Maemoku, H., Yokoyama, Y., Iwasaki, S.
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Journal Title
Asia Pacifice Conference on Luminescnece Dating 2006 23-26
Pages: 45
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Glacial fluctuation and warming event since mid-Holocene.2006
Author(s)
Maemoku, H., Miura, H., Iwasaki, S., Yokoyama, Y.
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Journal Title
The 26th Symposium on Polar Geosciences, Program and Abstracts, National Institute of Polara Research, Tokyo, Japan
Pages: 33-35
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] East Antarctic glaciations during the Late Quaternary recorded in cosmogenic nuclides along the Skarvsnes coast.2006
Author(s)
Yamane, M., Yokoyama, Y., Miura, H., Maemoku, H., Iwasaki, S., Matsuzaki, H.
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Journal Title
The 26th Symposium on Polar Geosciences, Program and Abstracts, National Institute of Polara Research, Tokyo, Japan
Pages: 36-37
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Holocene Glacial Fluctuation Reconstructed from Glacio-marine Sedeiments at Skallen in the Liitzow-Holm Bay, East Antarctica.2006
Author(s)
Maemoku, H., Miura, H., Iwasaki, S., Yokoyama, Y., Matsuzaki, H.
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Journal Title
Eos Trans. AGU, Fall Meet. Suppl., Abstract 87(52)
Pages: GC21A-1315
Description
「研究成果報告書概要(欧文)」より
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