Volcanic Eruptions on Mid-Ocean Ridges: Insights into Axial Magma Chamber Processes

大洋中脊的火山喷发：洞察轴向岩浆室过程

• 批准号: 0241578
• 负责人: John Sinton
• 金额: $ 19.82万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0241578&HistoricalAwards=false
• 关键词: Volcanic; Eruptions; Mid; Ocean; Ridges

This is a renewal of studies of volcanological phenomena at a superfast spreading mid-ocean ridge, with data from the southern East Pacific Rise. Mapping and sampling of seven lava flow sequences have been completed and has revealed that their size, along-axis continuity, internal chemical heteorgeneity, and relation to other lava sequences within individual ridge segments has implications for magmatic processes occurring in sub-axial magma chambers. The processes underlying the production of chemical heterogeneity in erupted lavas can now be studied, as well as the how the various magmatic processes operate on inter- and intra-eruption timescales.

这是对大洋中脊超快扩张的火山现象研究的更新，数据来自南东太平洋隆起。已经完成了7个熔岩流序列的填图和取样，并揭示了它们的大小、沿轴的连续性、内部化学不成因性以及与个别山脊段内其他熔岩序列的关系，对发生在次轴向岩浆房中的岩浆作用具有意义。现在可以研究在喷发的熔岩中产生化学不均质性的过程，以及各种岩浆过程如何在喷发间和喷发内的时间尺度上运作。