2010 Fiscal Year Final Research Report

Technical development of in-situ dating method for tiny zircon and implication for metamorphic dynamics.

Research Project

Project/Area Number	20340151
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Research Field	Petrology/Mineralogy/Science of ore deposit
Research Institution	Okayama University
Principal Investigator	KOBAYASHI Katsura Okayama University, 地球物質科学研究センター, 准教授 (20325129)
Co-Investigator(Kenkyū-buntansha)	TSUJIMORI Tatsuki 岡山大学, 地球物質科学研究センター, 准教授 (00436833)
Research Collaborator	REHMAN Hafiz Ur 鹿児島大学, 理工学研究科, 助教 (60505410)
Project Period (FY)	2008 – 2010
Keywords	地球惑星進化 / ジルコン / 年代測定 / 二次イオン質量分析計 / 変成岩
Research Abstract	The main subject of this research was development of in-situ zircon dating method by the secondary ion mass spectrometer. The author succeeded to develop sample polishing technique to get the very flat surface and to prepare reliable zircon standards by conventional techniques, then established new dating method, which can be applied less than 10 micron zircon grain. The method had been applied to the Kohistan high pressure metermorphic rocks and determined ~45 Ma as their metermorphic age.