Neodymium and Strontoum isotopic variations in North Pasific pelagic sediments.

Research Project

Project/Area Number	07640607
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Geology
Research Institution	KYUSHU UNIVERSITY
Principal Investigator	HAMAMOTO Reiko KYUSHU UNIVERSITY Faculty of Science, Reserch Assistant, 理学部, 教務員 (40089917)
Co-Investigator(Kenkyū-buntansha)	YANAGI Taketu KYUSYU UNIVERSITY Faculty of Science, Professor, 理学部, 教授 (90037234)
Project Period (FY)	1995 – 1997
Project Status	Completed (Fiscal Year 1997)
Budget Amount *help	¥2,200,000 (Direct Cost: ¥2,200,000) Fiscal Year 1997: ¥300,000 (Direct Cost: ¥300,000) Fiscal Year 1996: ¥500,000 (Direct Cost: ¥500,000) Fiscal Year 1995: ¥1,400,000 (Direct Cost: ¥1,400,000)
Keywords	neodymium isot / neodymium isotopic standard JNdi-1 / rare earth elements / pelagic sediments / improvement of Nd isotope analysis / Sm / ネオジウム同位体 / 標準試料 / JNdi-1 / 風成塵 / Sr同位体比
Research Abstract	It is difficult to separation and isotope measurement of rare earth elements (REE) as follows. (1) The REE occur as trace elements in rock-forming minerals, (2) the REE is quite similar in chemically each other, (3) isotopic variations of neodymium (Nd) in sediments are within 0.0001. We have no experience to analysis of REE and spent three years on improvement of analytical method of neodymium and samarium. The improvement of Nd isotope analysis by mass spectrometer is reported in "1996s meeting of Mass Spectrometry Society of Japan" as "Preparation of neodymium isotopic standard JNdi-1". That is co-studies of seven universities for the improvement of Nd isotopic analysis with new Nd standard prepared by T.Tanaka in Nagoya University. We also improved the Nd chemical separation from another REE and purification of REE from rock samples. We have to apologized that we couldn't reported on the Nd analytical result of pelagic sediments from North Pacific.