Structural and temporal evolution of the Hawaiian plume: Constraints from noble gases in surface samples and the HSDP drill core

夏威夷羽流的结构和时间演化：来自地表样本和 HSDP 钻芯中稀有气体的约束

• 批准号: 37353627
• 负责人: Dr. Samuel Niedermann
• 金额: --
• 依托单位: Sektion 3.1: Anorganische und Isotopengeochemie
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/37353627?language=en
• 关键词: Structural; temporal; evolution; Hawaiian; plume

Ocean Island Basalts (OIBs) produced by intraplate volcanoes such as e.g. the Hawaiian ones are often geochemically characterized by variable isotopic signatures due to sampling of different mantle reservoirs. These variations can occur over short distances on a very local scale. The aim of the Hawaii Scientific Drilling Project (HSDP) was to investigate the chemical and isotopic heterogeneity of a single volcano, Mauna Kea, to better constrain the temporal evolution of the Hawaiian mantle plume. In addition to this we are interested to study the Hawaiian mantle plume in time and space. Thus we propose to investigate the spatial structure of the Hawaiian plume using noble gas isotopes of samples from several volcanoes of the “Kea chain”. Noble gas data, especially Ne data, from the Kea trend volcanoes are scarce. Those data have not only the great potential for resolving different geochemical reservoirs but also to deduce mantle dynamic and magmatic processes being involved in melt generation and evolution.

由板内火山（例如夏威夷火山）产生的洋岛玄武岩（OIBs）通常具有不同的同位素特征，这是由于对不同地幔储层进行采样所致。这些变化可以发生在很短的距离上，在一个非常局部的规模。夏威夷科学钻探项目（HSDP）的目的是调查莫纳克亚火山的化学和同位素异质性，以更好地限制夏威夷地幔柱的时间演化。除此之外，我们有兴趣研究夏威夷地幔柱的时间和空间。因此，我们建议调查的空间结构的夏威夷羽使用稀有气体同位素的样品从几个火山的“Kea链”。稀有气体数据，特别是Ne数据，从Kea趋势火山是稀缺的。这些数据不仅在解决不同地球化学储集层问题上具有巨大潜力，而且在推断地幔动力学和参与熔体生成和演化的岩浆过程方面也具有巨大潜力。