The geochemical role of iron in basaltic magmatism and planetary differentiation: an experimental study

铁在玄武岩岩浆作用和行星分异中的地球化学作用：实验研究

• 批准号: DP0450252
• 负责人: Prof Hugh O'Neill
• 金额: $ 7.31万
• 依托单位: The Australian National University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2004
• 资助国家: 澳大利亚
• 起止时间: 2004-01-01 至 2006-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0450252
• 关键词: geochemical; role; iron; basaltic; magmatism

The amount of Fe in primitive terrestrial basalts is surprisingly variable. The reasons for this are poorly understood, but could include melting of Fe-enriched refertilized mantle sources, increasing partitioning of FeO into the melt with depth of melting, or oxidation of some FeO to Fe2O3. An experimental investigation of the effects of Fe both as 2+ and 3+ on the partial melting of model mantle material should help resolve this problem, while also providing the fundamental thermodynamic data needed to calibrate a general model for upper mantle phase relations.

原始陆地玄武岩中铁的含量变化惊人。 其原因尚不清楚，但可能包括富铁再肥化地幔源的熔化、随着熔化深度增加 FeO 在熔体中的分配，或一些 FeO 氧化为 Fe2O3。对 2+ 和 3+ 铁对模型地幔物质部分熔融影响的实验研究应该有助于解决这个问题，同时还提供校准上地幔相关系的通用模型所需的基本热力学数据。