1997 Fiscal Year Final Research Report Summary
The origin of sapropels in the Eastern Mediterranean Sea
| Project/Area Number |
08454146
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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 |
Stratigraphy/Paleontology
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| Research Institution | HOKKAIDOU UNIVERSITY |
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Principal Investigator |
KOIZUMI Itaru Hokkaido Univ.Grad.School of Sci.Prof., 大学院・理学研究科, 教授 (20029721)
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| Co-Investigator(Kenkyū-buntansha) |
MINAGAWA Masao Hokkaido Univ.Grad.School of Envi.Earth Sci.Assoc.Prof., 大学院・地球環境科学研究科, 教授 (10250507)
OOBA Tadamichi Hokkaido Univ.Grad.School of Envi.Earth Sci.Prof., 大学院・地球環境科学研究科, 教授 (60013588)
SAKAMOTO Tatsuhiko Hokkaido Univ.Grad.School of Sci.Inst., 大学院・理学研究科, 助手 (90271709)
SUZUKI Noriyuki Hokkaido Univ.Grad.School of Sci.Assoc.Prof., 大学院・理学研究科, 助教授 (00144692)
OKADA Hisatake Hokkaido Univ.Grad.School of Sci.Prof., 大学院・理学研究科, 教授 (80111334)
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| Project Period (FY) |
1996 – 1997
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| Keywords | sapropel / monsoon / precession / staratification / productivity / organic matter / unoxic / mediterranean |
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| Research Abstract |
The core at ODP Hole 969F-1H recovered 430 kyr including from S11 to S1 sapropels. The multi-proxies analysis revealed that the organic-rich sapropels S3, S4, S5, and S6 were deposited at the conditions of low salinity surface water and stagnant bottomwater with high input of terrigenous organic materials. The depositional conditions of S7 was similar of them but with different bottomwater conditions in which organic flux should be dissolved.The organic-low sapropels S1, S10, and S11, interbedded in slightly reddish brown nannofossil ooze, were formed under warmer mixed surface water and stagnant bottomwater with dominant of marine-origin organic materials.
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