Spatial and temporal variations in lithospheric strength along the Louisville Seamount Chain

路易斯维尔海山链沿线岩石圈强度的时空变化

• 批准号: NE/J011401/1
• 负责人: Anthony Brian Watts
• 金额: $ 4.8万
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2012
• 资助国家: 英国
• 起止时间: 2012 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FJ011401%2F1
• 关键词: Spatial; temporal; variations; lithospheric; strength

The first phase of this proposal focuses on developing new techniques and software to process and display data collected on the rock cores' physical properties, including density, porosity, colour properties, and concentration of potassium, thorium, and uranium in the rock. These tools will enable us to better identify and quantify real changes in these properties, rather than spurious variations caused by the breaks and fractures in the rock, and will enable future expeditions to do these analyses in real time, which provides valuable information for geochemical and petrological studies both during and after the expedition.The second phase of this proposal is directed at determining the vertical movements of the Louisville seamounts, which were once at or above sea level, but now lie over a kilometer under water, and how these movements reflect the strength of the outer part of the Earth, the lithosphere, underlying each seamount. We will be looking at how this strength varies over time at an individual seamount, as the lithosphere 'relaxes' under the load of the volcano, and also how it varies along the length of the Louisville Seamount Chain. This along-chain variation should predominantly reflect the variations in the age of the lithosphere when each volcano formed, but may also contain information about the impact of the hotspot that formed the seamounts and the geochemistry of the volcanoes themselves.

该提案的第一阶段侧重于开发新的技术和软件，以处理和显示收集到的关于岩石岩心物理特性的数据，包括密度、孔隙度、颜色特性以及岩石中钾、钍和铀的浓度。这些工具将使我们能够更好地识别和量化这些属性的真实的变化，而不是岩石中的断裂和裂缝引起的虚假变化，并将使未来的探险队能够在真实的时间内进行这些分析，这为考察期间和考察之后的地球化学和岩石学研究提供了有价值的信息。该建议的第二阶段旨在确定路易斯维尔的垂直运动我们将研究曾经处于海平面或高于海平面、但现在位于水下一公里以上的海底山脉，以及这些运动如何反映每个海底山脉下面的地球外部--岩石圈--的强度。我们将研究岩石圈在火山负荷下“松弛”时，单个海山的强度如何随时间变化，以及它如何沿沿着路易斯维尔海山链的长度变化。这种沿火山链的变化应主要反映每座火山形成时岩石圈年龄的变化，但也可能包含关于形成海山的热点的影响和火山本身的地球化学的信息。

项目成果

IODP expedition 330: Drilling the Louisville Seamount Trail in the SW Pacific

IODP 330 号探险队：在西南太平洋钻探路易斯维尔海山小道

• DOI: 10.2204/iodp.sd.15.02.2013
• 发表时间: 2013
• 期刊: Scientific Drilling
• 影响因子: 1.2
• 作者: Koppers;A.A.P. ;Yamazaki;Geldmacher;Anderson;Deschamps;Dorais;Ehmann;Fitton;Fulton;Ganbat;Hamelin
• 通讯作者: Hamelin

Erratum: Limited latitudinal mantle plume motion for the Louisville hotspot

勘误表：路易斯维尔热点的纬度地幔柱运动有限

• DOI: 10.1038/ngeo1677
• 发表时间: 2012
• 期刊: Nature Geoscience
• 影响因子: 18.3
• 作者: Koppers A

Discovery and analysis of topographic features using learning algorithms: A seamount case study

使用学习算法发现和分析地形特征：海山案例研究

• DOI: 10.1002/grl.50615
• 发表时间: 2013
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Valentine A