Analyses of environmental change in the continental area and marginal sea of the Arctic using radiogenic and stable isotopes of trace metal elements
| Project/Area Number |
20510008
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Environmental dynamic analysis
|
|---|
| Research Institution | Nagoya University |
|---|
Principal Investigator |
ASAHARA Yoshihiro Nagoya University, 環境学研究科, 助教 (10281065)
|
|---|
| Project Period (FY) |
2008 – 2010
|
| Project Status |
Completed (Fiscal Year 2010)
|
| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
|
|---|
| Keywords | 環境変動 / 同位体 / 海洋科学 / 地球化学 / 北極圏 |
|---|
| Research Abstract |
In this project, trace metal isotopes such as radiogenic Sr and Nd isotopes and stable Fe isotope were analyzed to examine the inflow and transportation of terrigenous material into the marginal seas such as the Bering and Okhotsk Seas. Isotope analyses of the Fe-Mn oxyhydroxides and carbonate in the Bering Sea sediments show that seawater Sr and Nd isotopes vary depending on weathering of the surrounding continental crusts such as Yukon River basin and the island-arc volcanic rocks such as Aleutians. In addition, iron of Fe-Mn oxyhydroxides and carbonate in the Okhotsk Sea has a "light" isotope composition, which suggests the supply from the Amur River. The regional and temporal variations of the Sr and Nd isotopes of the surface detrital sediments in the Bering and Chukchi Seas over the past 100 years reveal correlation of the terrigenous material supply from the surrounding continents and the annual mean SAT (surface air temperature) for the Arctic.
|
Report
(4 results)
Research Products
(35 results)
-
-
-
[Journal Article] La-Ce and Sm-Nd isotopic systematics of Early Proterozoic leucogranite with tetrad REE pattern.2010
Author(s)
Lee, S.G., Asahara Y., Tanaka T., Kim, N.H., Kim, K.H., Yi, K., Masuda, A., Song, Y.S.
-
Journal Title
Chemical Geology 276
Pages: 360-373
Related Report
Peer Reviewed
-
-
-
-
-
[Journal Article] Age and early metamorphic history of the Sambagawa belt : Lu-Hf and P-T constraints from the Western Iratsu eclogite.2009
Author(s)
Endo, S., Wallis, S., Hirata, T., Anczkiewicz, R., Platt, J., Thirlwall, M., Asahara Y.
-
Journal Title
Journal of Metamorphic Geology 27
Pages: 371-384
Related Report
Peer Reviewed
-
-
-
-
[Journal Article] Radiogenic and stable isotope systematics of strontium within a single granitic pluton.2009
Author(s)
Kimura, Y., Tsuboi, M., Wakaki, S., Katoh, D., Asahara, Y., Tanaka, T
-
Journal Title
Goldschmidt Conference 2009 (Davos, Switzerland)
Related Report
-
-
-
-
-
-
-
-
[Journal Article] Geochemical and isotopic constraints on the age and origin of the Nidar Ophiolitic Complex, Ladakh, India : Implications for the Neo-Tethyan subduction along the Indus suture zone.2008
Author(s)
Ahmad, T., Tanaka T., Sachan, H.K., Asahara Y., Islam, R., Khanna, P.P.
-
Journal Title
Tectonophysics 451
Pages: 206-224
Related Report
Peer Reviewed
-
-
-
-
-
-
-
-
-
[Journal Article] Geochemical and isotopic constraints On the age and origin of the Nidarop hiolitic Complex, Ladakh, India : Implications for the Neo-Tethyan subduction along the Indus suture zone2008
Author(s)
Ahmad, T., Tanaka, T., Sachan, H. K., Asahara, Y., Islam, R., Khanna. P. P.
-
Journal Title
Tectonophysics 451
Pages: 206-224
Related Report
Peer Reviewed
-
-
-
-
-
-
