2012 Fiscal Year Final Research Report
Utility of stable isotope system of tungsten as a paleocean redox proxy based on molecular structure
| Project/Area Number |
23840058
|
|---|
| Research Category |
Grant-in-Aid for Research Activity Start-up
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Geochemistry/Astrochemistry
|
|---|
| Research Institution | Japan Agency for Marine-Earth Science and Technology |
|---|
Principal Investigator |
KASHIWABARA Teruhiko 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, ポストドクトラル研究員 (70611515)
|
|---|
| Project Period (FY) |
2011 – 2012
|
| Keywords | タングステン / X-ray Absorption Fine Structure (XAFS) / 蛍光分光 / 同位体分別 / 鉄マンガン酸化物 |
|---|
| Research Abstract |
Adsorption on marine ferromanganese oxides is the important process controlling concentration and isotopic composition of tungsten (W) in modern oxic seawater. We focused on the enrichment and isotopic fractionation of W onto ferromanganese oxides by both structural analysis and isotope measurements. We revealed that W changes its molecular symmetry through inner-sphere complexation on the surface of both Fe (oxyhydr)oxides and Mn oxides, and also shows isotopic fractionation.
|
Research Products
(10 results)
