Behavior of lithium isotopes in subduction zone mantle

俯冲带地幔中锂同位素的行为

• 批准号: 21540505
• 负责人: OTA Tsutomu
• 金额: $ 2.83万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21540505/
• 关键词: 地球化学; 元素分配; 高温高圧実験; 二次イオン質量分析計; 沈み込み帯; 地殻・マントル物質; カンラン石; リチウム; 流体; 同位体分別; 二次イオン質量分析装置; 二次イオン質量分析装置(SIMS)

This study aimed to decipher parameters of lithium partitioning and lithium isotope fractionation between mantle olivine and aqueous fluid, in terms of experimental petrology, in order to understand chemical interaction between surficial and mantle materials in deep subduction zone, which has defined a chemical evolution of the Earth. Lithium isotopic compositions obtained from synthesized olivines suggested that the subduction-zone mantle could have been more significantly fractionated in lithium isotope, rather than expected by previous studies.

本研究旨在从实验岩石学的角度，揭示地幔橄榄石与水流体之间锂的分配和锂同位素分馏参数，以了解深俯冲带中地幔物质与表面质之间的化学作用，从而确定地球的化学演化。从合成橄榄石中获得的锂同位素组成表明，俯冲带地幔中的锂同位素可能已经更显着分馏，而不是预期的先前的研究。

项目成果

In situ ion-microprobe determination of trace element partition coefficients for hornblende, plagioclase, orthopyroxene and apatite in equilibrium with natural rhyolitic glass

原位离子微探针测定与天然流纹石玻璃平衡的角闪石、斜长石、斜方辉石和磷灰石的微量元素分配系数

• 发表时间: 2011
• 期刊: Little Glass Mountain Rhyolite, California. American Mineralogist
• 作者: Brophy J. G.;Ota T.;Kunihiro T.;Tsujimori T.;Nakamura E.
• 通讯作者: Nakamura E.