Composition of Lavas from the Continuing Puu Oo Eruption of Kilauea Volcano, Hawaii

夏威夷基拉韦厄火山持续喷发的熔岩成分

• 批准号: 9405573
• 负责人: Michael Garcia
• 金额: $ 7.37万
• 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: 1994
• 资助国家: 美国
• 起止时间: 1994-07-01 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9405573&HistoricalAwards=false
• 关键词: Composition; Lavas; Continuing; Puu; Oo

9405573 Garcia The purpose of this study is to determine the nature and causes of compositional variation in lavas from the continuing eruption (1983 to present) of Kilauea Volcano, Hawaii. Mineral, glass and whole-rock compositions and O, Pb, Sr, Nd and Th isotope ratios will be determined and used to evaluate the relative importance of crystal fractionation, magma mixing, lithosphere assimilation and mantle melting processes in controlling the lava composition. Due to the long duration of this eruption ( 10 years), the lavas from this eruption offer a unique opportunity to investigate the effects of both crustal and mantle processes on lava composition. This is the only study that has extensively characterized Kilauea lavas. Only by fully characterizing Kilauea lavas can we hope to decipher the origin and evolution of this critical key component to the hotspot paradigm.

9405573加西亚这项研究的目的是确定自1983年至今夏威夷基拉韦厄火山持续喷发期间熔岩成分变化的性质和原因。将测定矿物、玻璃和全岩成分以及O、Pb、SR、ND和Th同位素比值，并用它们来评价晶体分馏、岩浆混合、岩石圈同化和地幔熔融过程在控制熔岩成分方面的相对重要性。由于这次喷发的持续时间很长(10年)，这次喷发产生的熔岩提供了一个独特的机会来研究地壳和地幔过程对熔岩成分的影响。这是唯一一项广泛描述基拉韦厄火山熔岩特征的研究。只有通过充分描述基拉韦厄火山熔岩的特征，我们才有希望破译这一热点范式的关键组成部分的起源和演化。