| Project/Area Number |
14340148
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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 |
Geology
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| Research Institution | Niigata University |
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Principal Investigator |
MATSUOKA Atsushi Niigata University, Faculty of Science, Professor, 理学部, 教授 (00183947)
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| Co-Investigator(Kenkyū-buntansha) |
WATANABE Naoki Niigata University, Research Institute for Hazards in Snowy Areas, Lecturer, 積雪地域災害研究センター, 講師 (60282977)
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| Project Period (FY) |
2002 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥14,400,000 (Direct Cost: ¥14,400,000)
Fiscal Year 2004: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2003: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2002: ¥11,200,000 (Direct Cost: ¥11,200,000)
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| Keywords | Siliceous deposits / chert / radiolaria / Mesozoic / Paleozoic / Oxygen Isotope |
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| Research Abstract |
This project aims at unifying biostratigraphy by means of microfossils such as radiolarians and Oxygen isotope stratigaphy. The most important agenda for this project was to make up a laser microprobe analyzer composed of a laser unit and Oxygen purification lines. The analyzer has been completed at the end of the project term due to twice moves in connection to the renewal of an old building and the construction of a new building. However, the newly established analyzer is much more useful than originally planed because it produces not only Oxygen isotopes but also Silicon isotopes.
Oxygen isotopes of deep sea siliceous deposits obtained from the Pacific during ODP Leg 129 were measured by using a laser microprobe analyzer in the Geological Survey of Japan before the analyzer in Niigata University was set up. A preliminary result indicates that Upper Jurassic to Lower Cretaceous stratigraphy by means of Oxygen isotope and radiolaria is successfully unified.
Radiolarian biostratigraphic and micropaleontologic researches were carried out in the Mino and Chichibu Terranes, Southwest Japan. Scientific results on radiolarian paleontology and stratigraphy came from Southern Tibet in China and the North Palawan Block in the Philippines. Pelagic biogenic siliceous rocks have been collected systematically from Switzerland, Italy and Slovenia in the European Alps. These samples will be used for Oxygen and Silicon isotope measurements in the near future.
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